/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:29:15,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:29:15,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:29:15,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:29:15,601 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 17:29:15,629 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:29:15,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:29:15,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:29:15,630 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:29:15,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:29:15,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:29:15,632 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:29:15,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:29:15,633 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:29:15,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:29:15,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:29:15,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:29:15,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:29:15,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:29:15,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:29:15,634 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:29:15,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:29:15,634 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:29:15,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:29:15,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:29:15,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:29:15,635 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:29:15,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:29:15,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:29:15,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:29:15,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:29:15,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:29:15,636 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:29:15,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:29:15,636 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:29:15,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:29:15,636 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:29:15,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:29:15,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:29:15,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:29:15,917 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:29:15,918 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:29:15,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-symm.wvr.bpl [2021-07-09 17:29:15,918 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-symm.wvr.bpl' [2021-07-09 17:29:15,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:29:15,952 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:29:15,953 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:29:15,953 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:29:15,953 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:29:15,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:29:15" (1/1) ... [2021-07-09 17:29:15,968 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:29:15" (1/1) ... [2021-07-09 17:29:15,973 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:29:15,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:29:15,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:29:15,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:29:15,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:29:15" (1/1) ... [2021-07-09 17:29:15,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:29:15" (1/1) ... [2021-07-09 17:29:15,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:29:15" (1/1) ... [2021-07-09 17:29:15,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:29:15" (1/1) ... [2021-07-09 17:29:15,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:29:15" (1/1) ... [2021-07-09 17:29:15,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:29:15" (1/1) ... [2021-07-09 17:29:15,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:29:15" (1/1) ... [2021-07-09 17:29:15,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:29:15,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:29:15,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:29:15,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:29:15,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:29:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:29:16,052 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:29:16,053 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:29:16,053 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:29:16,053 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:29:16,053 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:29:16,053 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:29:16,053 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:29:16,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:29:16,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:29:16,054 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:29:16,239 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:29:16,240 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-09 17:29:16,241 INFO L202 PluginConnector]: Adding new model chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:29:16 BoogieIcfgContainer [2021-07-09 17:29:16,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:29:16,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:29:16,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:29:16,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:29:16,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:29:15" (1/2) ... [2021-07-09 17:29:16,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c1584c and model type chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:29:16, skipping insertion in model container [2021-07-09 17:29:16,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:29:16" (2/2) ... [2021-07-09 17:29:16,246 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-symm.wvr.bpl [2021-07-09 17:29:16,249 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:29:16,250 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:29:16,250 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:29:16,250 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:29:16,313 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 17:29:16,328 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 17:29:16,345 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:29:16,345 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:29:16,345 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:29:16,345 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:29:16,346 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:29:16,346 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:29:16,346 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:29:16,346 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:29:16,352 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-07-09 17:29:16,363 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,386 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:29:16,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:16,391 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:16,391 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:16,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:16,398 INFO L82 PathProgramCache]: Analyzing trace with hash -257954186, now seen corresponding path program 1 times [2021-07-09 17:29:16,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:16,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666185782] [2021-07-09 17:29:16,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:16,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:16,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666185782] [2021-07-09 17:29:16,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666185782] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:29:16,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:29:16,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:29:16,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728930026] [2021-07-09 17:29:16,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:29:16,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:16,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:29:16,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:29:16,571 INFO L87 Difference]: Start difference. First operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:16,598 INFO L93 Difference]: Finished difference Result 50 states and 90 transitions. [2021-07-09 17:29:16,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:29:16,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 17:29:16,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:16,606 INFO L225 Difference]: With dead ends: 50 [2021-07-09 17:29:16,606 INFO L226 Difference]: Without dead ends: 45 [2021-07-09 17:29:16,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:29:16,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-07-09 17:29:16,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2021-07-09 17:29:16,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 56 transitions. [2021-07-09 17:29:16,639 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 56 transitions. Word has length 12 [2021-07-09 17:29:16,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:16,639 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 56 transitions. [2021-07-09 17:29:16,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,639 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 56 transitions. [2021-07-09 17:29:16,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:29:16,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:16,641 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:16,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:29:16,641 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:16,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:16,644 INFO L82 PathProgramCache]: Analyzing trace with hash 255431018, now seen corresponding path program 2 times [2021-07-09 17:29:16,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:16,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369465604] [2021-07-09 17:29:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:16,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:16,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369465604] [2021-07-09 17:29:16,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369465604] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:29:16,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:29:16,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:29:16,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641913312] [2021-07-09 17:29:16,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:29:16,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:16,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:29:16,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:29:16,702 INFO L87 Difference]: Start difference. First operand 30 states and 56 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:16,722 INFO L93 Difference]: Finished difference Result 48 states and 89 transitions. [2021-07-09 17:29:16,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:29:16,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 17:29:16,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:16,725 INFO L225 Difference]: With dead ends: 48 [2021-07-09 17:29:16,725 INFO L226 Difference]: Without dead ends: 48 [2021-07-09 17:29:16,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:29:16,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-07-09 17:29:16,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2021-07-09 17:29:16,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-07-09 17:29:16,734 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-07-09 17:29:16,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:16,734 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-07-09 17:29:16,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,734 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-07-09 17:29:16,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:29:16,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:16,736 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:16,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:29:16,736 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:16,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:16,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1890739742, now seen corresponding path program 3 times [2021-07-09 17:29:16,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:16,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516401585] [2021-07-09 17:29:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:16,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:16,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:16,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516401585] [2021-07-09 17:29:16,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516401585] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:29:16,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:29:16,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:29:16,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767152411] [2021-07-09 17:29:16,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:29:16,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:16,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:29:16,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:29:16,772 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:16,796 INFO L93 Difference]: Finished difference Result 36 states and 68 transitions. [2021-07-09 17:29:16,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:29:16,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 17:29:16,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:16,797 INFO L225 Difference]: With dead ends: 36 [2021-07-09 17:29:16,798 INFO L226 Difference]: Without dead ends: 36 [2021-07-09 17:29:16,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:29:16,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-07-09 17:29:16,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-07-09 17:29:16,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-07-09 17:29:16,800 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-07-09 17:29:16,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:16,801 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-07-09 17:29:16,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,801 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-07-09 17:29:16,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:29:16,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:16,801 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:16,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:29:16,802 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:16,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:16,802 INFO L82 PathProgramCache]: Analyzing trace with hash -309182698, now seen corresponding path program 1 times [2021-07-09 17:29:16,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:16,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316832153] [2021-07-09 17:29:16,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:16,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:16,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316832153] [2021-07-09 17:29:16,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316832153] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:29:16,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:29:16,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:29:16,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708833759] [2021-07-09 17:29:16,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:29:16,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:16,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:29:16,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:29:16,831 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:16,844 INFO L93 Difference]: Finished difference Result 38 states and 72 transitions. [2021-07-09 17:29:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:29:16,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:29:16,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:16,845 INFO L225 Difference]: With dead ends: 38 [2021-07-09 17:29:16,845 INFO L226 Difference]: Without dead ends: 38 [2021-07-09 17:29:16,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:29:16,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-07-09 17:29:16,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-07-09 17:29:16,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.945945945945946) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 72 transitions. [2021-07-09 17:29:16,848 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 72 transitions. Word has length 13 [2021-07-09 17:29:16,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:16,849 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 72 transitions. [2021-07-09 17:29:16,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,849 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 72 transitions. [2021-07-09 17:29:16,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:29:16,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:16,849 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:16,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:29:16,850 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:16,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:16,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1319300302, now seen corresponding path program 2 times [2021-07-09 17:29:16,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:16,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124409498] [2021-07-09 17:29:16,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:16,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:16,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124409498] [2021-07-09 17:29:16,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124409498] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:29:16,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:29:16,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:29:16,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559908664] [2021-07-09 17:29:16,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:29:16,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:16,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:29:16,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:29:16,882 INFO L87 Difference]: Start difference. First operand 38 states and 72 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:16,893 INFO L93 Difference]: Finished difference Result 59 states and 106 transitions. [2021-07-09 17:29:16,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:29:16,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:29:16,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:16,894 INFO L225 Difference]: With dead ends: 59 [2021-07-09 17:29:16,894 INFO L226 Difference]: Without dead ends: 59 [2021-07-09 17:29:16,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:29:16,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-07-09 17:29:16,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2021-07-09 17:29:16,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-07-09 17:29:16,897 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 13 [2021-07-09 17:29:16,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:16,897 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-07-09 17:29:16,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-07-09 17:29:16,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:29:16,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:16,898 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:16,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:29:16,898 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:16,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:16,899 INFO L82 PathProgramCache]: Analyzing trace with hash -626720332, now seen corresponding path program 3 times [2021-07-09 17:29:16,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:16,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725240490] [2021-07-09 17:29:16,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:16,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:16,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725240490] [2021-07-09 17:29:16,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725240490] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:29:16,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:29:16,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:29:16,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597351090] [2021-07-09 17:29:16,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:29:16,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:16,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:29:16,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:29:16,927 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:16,942 INFO L93 Difference]: Finished difference Result 41 states and 76 transitions. [2021-07-09 17:29:16,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:29:16,943 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:29:16,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:16,943 INFO L225 Difference]: With dead ends: 41 [2021-07-09 17:29:16,944 INFO L226 Difference]: Without dead ends: 39 [2021-07-09 17:29:16,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:29:16,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-07-09 17:29:16,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-07-09 17:29:16,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-07-09 17:29:16,955 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-07-09 17:29:16,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:16,955 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-07-09 17:29:16,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,955 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-07-09 17:29:16,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:29:16,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:16,956 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:16,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 17:29:16,956 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:16,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:16,957 INFO L82 PathProgramCache]: Analyzing trace with hash -968107418, now seen corresponding path program 1 times [2021-07-09 17:29:16,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:16,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400588627] [2021-07-09 17:29:16,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:17,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:17,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400588627] [2021-07-09 17:29:17,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400588627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:17,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730007952] [2021-07-09 17:29:17,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:17,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:29:17,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:17,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-07-09 17:29:17,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:17,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:17,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:17,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:17,409 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:29:17,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:17,411 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:39 [2021-07-09 17:29:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:17,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730007952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:17,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:17,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 17:29:17,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103264914] [2021-07-09 17:29:17,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:29:17,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:17,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:29:17,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:29:17,562 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:17,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:17,742 INFO L93 Difference]: Finished difference Result 78 states and 144 transitions. [2021-07-09 17:29:17,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:17,743 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:29:17,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:17,744 INFO L225 Difference]: With dead ends: 78 [2021-07-09 17:29:17,744 INFO L226 Difference]: Without dead ends: 71 [2021-07-09 17:29:17,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 285.3ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:29:17,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-07-09 17:29:17,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2021-07-09 17:29:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 93 transitions. [2021-07-09 17:29:17,759 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 93 transitions. Word has length 14 [2021-07-09 17:29:17,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:17,760 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 93 transitions. [2021-07-09 17:29:17,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 93 transitions. [2021-07-09 17:29:17,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:29:17,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:17,760 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:17,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-09 17:29:17,961 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:17,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:17,962 INFO L82 PathProgramCache]: Analyzing trace with hash 2061932018, now seen corresponding path program 2 times [2021-07-09 17:29:17,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:17,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885247104] [2021-07-09 17:29:17,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:18,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:18,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885247104] [2021-07-09 17:29:18,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885247104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:18,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875708929] [2021-07-09 17:29:18,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:18,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:18,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:18,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:29:18,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:18,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:18,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:18,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:18,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:18,433 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:18,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:18,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:18,442 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-07-09 17:29:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:18,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875708929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:18,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:18,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:29:18,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463255880] [2021-07-09 17:29:18,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:29:18,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:18,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:29:18,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:18,478 INFO L87 Difference]: Start difference. First operand 49 states and 93 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:18,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:18,804 INFO L93 Difference]: Finished difference Result 101 states and 189 transitions. [2021-07-09 17:29:18,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:29:18,804 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:29:18,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:18,805 INFO L225 Difference]: With dead ends: 101 [2021-07-09 17:29:18,805 INFO L226 Difference]: Without dead ends: 85 [2021-07-09 17:29:18,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 409.8ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:18,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-07-09 17:29:18,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 51. [2021-07-09 17:29:18,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:18,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 99 transitions. [2021-07-09 17:29:18,808 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 99 transitions. Word has length 14 [2021-07-09 17:29:18,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:18,808 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 99 transitions. [2021-07-09 17:29:18,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:18,808 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 99 transitions. [2021-07-09 17:29:18,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:29:18,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:18,809 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:19,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-09 17:29:19,010 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:19,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:19,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1138943690, now seen corresponding path program 3 times [2021-07-09 17:29:19,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:19,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402375001] [2021-07-09 17:29:19,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:19,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:19,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402375001] [2021-07-09 17:29:19,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402375001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:19,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027334406] [2021-07-09 17:29:19,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:19,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:29:19,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:19,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:29:19,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:19,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:19,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:19,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:19,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:19,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:19,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:19,352 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:19,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:19,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:19,358 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-07-09 17:29:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:19,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027334406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:19,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:19,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:29:19,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252141912] [2021-07-09 17:29:19,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:29:19,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:19,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:29:19,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:19,391 INFO L87 Difference]: Start difference. First operand 51 states and 99 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:19,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:19,527 INFO L93 Difference]: Finished difference Result 69 states and 134 transitions. [2021-07-09 17:29:19,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:19,528 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:29:19,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:19,528 INFO L225 Difference]: With dead ends: 69 [2021-07-09 17:29:19,528 INFO L226 Difference]: Without dead ends: 62 [2021-07-09 17:29:19,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 222.4ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:19,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-07-09 17:29:19,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-07-09 17:29:19,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:19,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 104 transitions. [2021-07-09 17:29:19,530 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 104 transitions. Word has length 14 [2021-07-09 17:29:19,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:19,531 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 104 transitions. [2021-07-09 17:29:19,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:19,531 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 104 transitions. [2021-07-09 17:29:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:29:19,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:19,531 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:19,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 17:29:19,753 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:19,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:19,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2758418, now seen corresponding path program 4 times [2021-07-09 17:29:19,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:19,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777736351] [2021-07-09 17:29:19,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:19,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:19,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777736351] [2021-07-09 17:29:19,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777736351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:19,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368004658] [2021-07-09 17:29:19,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:19,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:19,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:19,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:29:19,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:20,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:20,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:20,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:29:20,060 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:20,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:20,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:20,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:20,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:20,114 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:20,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:20,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:20,138 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:29:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:20,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368004658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:20,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:20,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:29:20,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763809646] [2021-07-09 17:29:20,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:29:20,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:20,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:29:20,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:29:20,214 INFO L87 Difference]: Start difference. First operand 53 states and 104 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:20,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:20,436 INFO L93 Difference]: Finished difference Result 75 states and 146 transitions. [2021-07-09 17:29:20,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:20,436 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:29:20,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:20,437 INFO L225 Difference]: With dead ends: 75 [2021-07-09 17:29:20,437 INFO L226 Difference]: Without dead ends: 66 [2021-07-09 17:29:20,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 353.9ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:20,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-07-09 17:29:20,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 52. [2021-07-09 17:29:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:20,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-07-09 17:29:20,441 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 14 [2021-07-09 17:29:20,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:20,441 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-07-09 17:29:20,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:20,441 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-07-09 17:29:20,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:29:20,444 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:20,444 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:20,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:20,649 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:20,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:20,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2146038118, now seen corresponding path program 5 times [2021-07-09 17:29:20,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:20,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345041303] [2021-07-09 17:29:20,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:20,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:20,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:20,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345041303] [2021-07-09 17:29:20,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345041303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:20,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405037639] [2021-07-09 17:29:20,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:20,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:29:20,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:20,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:29:20,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:20,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:20,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:20,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:20,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:29:20,920 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:20,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:20,924 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:20,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:20,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:20,946 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:29:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:21,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405037639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:21,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:21,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:29:21,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709462326] [2021-07-09 17:29:21,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:29:21,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:21,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:29:21,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:21,027 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:21,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:21,512 INFO L93 Difference]: Finished difference Result 116 states and 214 transitions. [2021-07-09 17:29:21,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:29:21,513 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:29:21,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:21,513 INFO L225 Difference]: With dead ends: 116 [2021-07-09 17:29:21,513 INFO L226 Difference]: Without dead ends: 93 [2021-07-09 17:29:21,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 528.3ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:29:21,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-09 17:29:21,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2021-07-09 17:29:21,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 57 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:21,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 118 transitions. [2021-07-09 17:29:21,516 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 118 transitions. Word has length 14 [2021-07-09 17:29:21,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:21,516 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 118 transitions. [2021-07-09 17:29:21,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:21,516 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 118 transitions. [2021-07-09 17:29:21,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:29:21,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:21,516 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:21,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 17:29:21,734 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:21,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:21,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2024741970, now seen corresponding path program 6 times [2021-07-09 17:29:21,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:21,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255434395] [2021-07-09 17:29:21,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:21,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:21,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255434395] [2021-07-09 17:29:21,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255434395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:21,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801528645] [2021-07-09 17:29:21,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:21,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:29:21,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:21,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:29:21,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:21,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:21,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:21,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:22,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:22,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:22,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:29:22,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:22,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:22,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:22,010 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:29:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:22,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801528645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:22,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:22,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:29:22,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656207360] [2021-07-09 17:29:22,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:29:22,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:22,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:29:22,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:22,041 INFO L87 Difference]: Start difference. First operand 58 states and 118 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:22,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:22,193 INFO L93 Difference]: Finished difference Result 78 states and 156 transitions. [2021-07-09 17:29:22,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:22,194 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:29:22,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:22,194 INFO L225 Difference]: With dead ends: 78 [2021-07-09 17:29:22,194 INFO L226 Difference]: Without dead ends: 71 [2021-07-09 17:29:22,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 232.5ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:22,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-07-09 17:29:22,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2021-07-09 17:29:22,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.086206896551724) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:22,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 121 transitions. [2021-07-09 17:29:22,197 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 121 transitions. Word has length 14 [2021-07-09 17:29:22,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:22,197 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 121 transitions. [2021-07-09 17:29:22,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:22,197 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 121 transitions. [2021-07-09 17:29:22,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:29:22,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:22,198 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:22,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:22,406 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:22,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:22,407 INFO L82 PathProgramCache]: Analyzing trace with hash -888556698, now seen corresponding path program 7 times [2021-07-09 17:29:22,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:22,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526575588] [2021-07-09 17:29:22,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:22,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:22,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526575588] [2021-07-09 17:29:22,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526575588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:22,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039793805] [2021-07-09 17:29:22,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:22,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:29:22,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:22,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:22,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:22,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:22,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:22,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:22,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:22,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:22,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:22,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:22,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:22,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:22,622 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:22,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:22,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:22,627 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:22,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:22,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:22,649 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:29:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:22,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039793805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:22,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:22,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:29:22,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120634028] [2021-07-09 17:29:22,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:29:22,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:22,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:29:22,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:22,733 INFO L87 Difference]: Start difference. First operand 59 states and 121 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:22,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:22,945 INFO L93 Difference]: Finished difference Result 84 states and 168 transitions. [2021-07-09 17:29:22,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:22,946 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:29:22,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:22,946 INFO L225 Difference]: With dead ends: 84 [2021-07-09 17:29:22,946 INFO L226 Difference]: Without dead ends: 75 [2021-07-09 17:29:22,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 263.2ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:22,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-07-09 17:29:22,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2021-07-09 17:29:22,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 57 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:22,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 118 transitions. [2021-07-09 17:29:22,948 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 118 transitions. Word has length 14 [2021-07-09 17:29:22,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:22,949 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 118 transitions. [2021-07-09 17:29:22,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:22,949 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 118 transitions. [2021-07-09 17:29:22,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:29:22,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:22,949 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:23,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 17:29:23,150 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:23,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:23,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1260239838, now seen corresponding path program 8 times [2021-07-09 17:29:23,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:23,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144876872] [2021-07-09 17:29:23,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:23,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:23,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144876872] [2021-07-09 17:29:23,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144876872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:23,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879292014] [2021-07-09 17:29:23,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:23,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:23,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:23,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:29:23,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:23,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:23,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:23,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:23,458 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:23,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:23,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:23,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:23,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:29:23,513 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:23,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:23,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:23,539 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:29:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:23,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879292014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:23,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:23,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:29:23,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892096031] [2021-07-09 17:29:23,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:29:23,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:23,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:29:23,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:23,628 INFO L87 Difference]: Start difference. First operand 58 states and 118 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:23,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:23,727 INFO L93 Difference]: Finished difference Result 86 states and 167 transitions. [2021-07-09 17:29:23,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:23,727 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:29:23,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:23,728 INFO L225 Difference]: With dead ends: 86 [2021-07-09 17:29:23,728 INFO L226 Difference]: Without dead ends: 72 [2021-07-09 17:29:23,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 233.4ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:29:23,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-07-09 17:29:23,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2021-07-09 17:29:23,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 125 transitions. [2021-07-09 17:29:23,730 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 125 transitions. Word has length 14 [2021-07-09 17:29:23,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:23,730 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 125 transitions. [2021-07-09 17:29:23,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:23,730 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 125 transitions. [2021-07-09 17:29:23,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:29:23,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:23,731 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:23,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 17:29:23,945 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:23,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:23,945 INFO L82 PathProgramCache]: Analyzing trace with hash 247547306, now seen corresponding path program 9 times [2021-07-09 17:29:23,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:23,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895690781] [2021-07-09 17:29:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:24,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:24,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895690781] [2021-07-09 17:29:24,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895690781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:24,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729105012] [2021-07-09 17:29:24,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:24,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:29:24,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:24,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:29:24,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:24,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:24,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:24,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:24,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:24,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:24,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:24,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:29:24,311 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:24,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:24,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:29:24,334 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:24,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:24,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:24,352 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:29:24,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:24,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729105012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:24,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:24,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:29:24,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956513022] [2021-07-09 17:29:24,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:29:24,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:24,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:29:24,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:24,445 INFO L87 Difference]: Start difference. First operand 60 states and 125 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:24,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:24,626 INFO L93 Difference]: Finished difference Result 108 states and 210 transitions. [2021-07-09 17:29:24,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:24,626 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:29:24,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:24,627 INFO L225 Difference]: With dead ends: 108 [2021-07-09 17:29:24,627 INFO L226 Difference]: Without dead ends: 94 [2021-07-09 17:29:24,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 304.0ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:24,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-09 17:29:24,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2021-07-09 17:29:24,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 131 transitions. [2021-07-09 17:29:24,629 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 131 transitions. Word has length 14 [2021-07-09 17:29:24,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:24,629 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 131 transitions. [2021-07-09 17:29:24,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:24,629 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 131 transitions. [2021-07-09 17:29:24,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:24,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:24,630 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:24,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 17:29:24,837 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:24,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:24,837 INFO L82 PathProgramCache]: Analyzing trace with hash 80062742, now seen corresponding path program 10 times [2021-07-09 17:29:24,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:24,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142229833] [2021-07-09 17:29:24,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:24,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:24,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142229833] [2021-07-09 17:29:24,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142229833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:24,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790935759] [2021-07-09 17:29:24,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:24,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:24,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:24,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:24,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:24,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790935759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:24,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:24,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:29:24,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130290388] [2021-07-09 17:29:24,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:29:24,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:24,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:29:24,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:29:25,000 INFO L87 Difference]: Start difference. First operand 63 states and 131 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:25,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:25,210 INFO L93 Difference]: Finished difference Result 89 states and 173 transitions. [2021-07-09 17:29:25,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:25,211 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:25,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:25,213 INFO L225 Difference]: With dead ends: 89 [2021-07-09 17:29:25,213 INFO L226 Difference]: Without dead ends: 78 [2021-07-09 17:29:25,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:25,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-07-09 17:29:25,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2021-07-09 17:29:25,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:25,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 121 transitions. [2021-07-09 17:29:25,218 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 121 transitions. Word has length 15 [2021-07-09 17:29:25,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:25,218 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 121 transitions. [2021-07-09 17:29:25,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:25,218 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 121 transitions. [2021-07-09 17:29:25,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:25,219 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:25,219 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:25,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:25,429 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:25,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:25,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1340900102, now seen corresponding path program 11 times [2021-07-09 17:29:25,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:25,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321209624] [2021-07-09 17:29:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:25,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:25,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321209624] [2021-07-09 17:29:25,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321209624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:25,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126161372] [2021-07-09 17:29:25,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:25,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:25,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:25,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:25,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:25,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126161372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:25,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:25,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:29:25,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964662818] [2021-07-09 17:29:25,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:29:25,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:25,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:29:25,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:29:25,560 INFO L87 Difference]: Start difference. First operand 58 states and 121 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:25,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:25,606 INFO L93 Difference]: Finished difference Result 86 states and 172 transitions. [2021-07-09 17:29:25,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:25,607 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:25,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:25,607 INFO L225 Difference]: With dead ends: 86 [2021-07-09 17:29:25,607 INFO L226 Difference]: Without dead ends: 86 [2021-07-09 17:29:25,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:29:25,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-07-09 17:29:25,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 59. [2021-07-09 17:29:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 58 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:25,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 124 transitions. [2021-07-09 17:29:25,609 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 124 transitions. Word has length 15 [2021-07-09 17:29:25,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:25,610 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 124 transitions. [2021-07-09 17:29:25,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:25,610 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 124 transitions. [2021-07-09 17:29:25,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:25,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:25,610 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:25,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 17:29:25,813 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:25,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:25,813 INFO L82 PathProgramCache]: Analyzing trace with hash -477995254, now seen corresponding path program 12 times [2021-07-09 17:29:25,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:25,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879735643] [2021-07-09 17:29:25,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:25,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:25,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879735643] [2021-07-09 17:29:25,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879735643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:25,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584233735] [2021-07-09 17:29:25,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:25,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:29:25,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:25,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:25,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:26,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584233735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:26,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:26,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:26,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889055707] [2021-07-09 17:29:26,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:26,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:26,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:26,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:26,060 INFO L87 Difference]: Start difference. First operand 59 states and 124 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:26,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:26,313 INFO L93 Difference]: Finished difference Result 89 states and 174 transitions. [2021-07-09 17:29:26,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:26,313 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:26,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:26,314 INFO L225 Difference]: With dead ends: 89 [2021-07-09 17:29:26,314 INFO L226 Difference]: Without dead ends: 83 [2021-07-09 17:29:26,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 287.8ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:29:26,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-09 17:29:26,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2021-07-09 17:29:26,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.135593220338983) internal successors, (126), 59 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:26,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 126 transitions. [2021-07-09 17:29:26,316 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 126 transitions. Word has length 15 [2021-07-09 17:29:26,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:26,316 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 126 transitions. [2021-07-09 17:29:26,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:26,316 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 126 transitions. [2021-07-09 17:29:26,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:26,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:26,316 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:26,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 17:29:26,521 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:26,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:26,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1170063830, now seen corresponding path program 13 times [2021-07-09 17:29:26,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:26,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363575260] [2021-07-09 17:29:26,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:26,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:26,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363575260] [2021-07-09 17:29:26,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363575260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:26,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267226772] [2021-07-09 17:29:26,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:29:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:26,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:26,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:26,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267226772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:26,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:26,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:26,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211468346] [2021-07-09 17:29:26,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:26,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:26,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:26,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:26,727 INFO L87 Difference]: Start difference. First operand 60 states and 126 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:26,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:26,820 INFO L93 Difference]: Finished difference Result 99 states and 198 transitions. [2021-07-09 17:29:26,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:26,820 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:26,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:26,821 INFO L225 Difference]: With dead ends: 99 [2021-07-09 17:29:26,821 INFO L226 Difference]: Without dead ends: 99 [2021-07-09 17:29:26,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:26,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-09 17:29:26,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 60. [2021-07-09 17:29:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.135593220338983) internal successors, (126), 59 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:26,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 126 transitions. [2021-07-09 17:29:26,823 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 126 transitions. Word has length 15 [2021-07-09 17:29:26,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:26,823 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 126 transitions. [2021-07-09 17:29:26,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:26,823 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 126 transitions. [2021-07-09 17:29:26,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:26,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:26,823 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:27,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-09 17:29:27,030 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:27,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:27,030 INFO L82 PathProgramCache]: Analyzing trace with hash 384009810, now seen corresponding path program 14 times [2021-07-09 17:29:27,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:27,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920808523] [2021-07-09 17:29:27,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:27,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:27,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920808523] [2021-07-09 17:29:27,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920808523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:27,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848386503] [2021-07-09 17:29:27,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:27,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:27,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:27,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:27,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:27,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:27,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:27,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:27,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:27,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:27,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:29:27,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:27,267 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:29:27,268 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:29:27,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:29:27,276 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:27,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:27,287 INFO L518 ElimStorePlain]: Eliminatee v_prenex_15 vanished before elimination [2021-07-09 17:29:27,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:27,289 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:29:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:27,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848386503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:27,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:27,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:27,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313977942] [2021-07-09 17:29:27,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:27,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:27,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:27,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:27,314 INFO L87 Difference]: Start difference. First operand 60 states and 126 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:27,838 INFO L93 Difference]: Finished difference Result 102 states and 195 transitions. [2021-07-09 17:29:27,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:27,838 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:27,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:27,838 INFO L225 Difference]: With dead ends: 102 [2021-07-09 17:29:27,839 INFO L226 Difference]: Without dead ends: 99 [2021-07-09 17:29:27,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 520.0ms TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:27,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-09 17:29:27,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 65. [2021-07-09 17:29:27,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.140625) internal successors, (137), 64 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:27,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 137 transitions. [2021-07-09 17:29:27,841 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 137 transitions. Word has length 15 [2021-07-09 17:29:27,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:27,841 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 137 transitions. [2021-07-09 17:29:27,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:27,841 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 137 transitions. [2021-07-09 17:29:27,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:27,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:27,841 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:28,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:28,053 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:28,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:28,053 INFO L82 PathProgramCache]: Analyzing trace with hash 160078342, now seen corresponding path program 15 times [2021-07-09 17:29:28,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:28,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376519891] [2021-07-09 17:29:28,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:28,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:28,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376519891] [2021-07-09 17:29:28,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376519891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:28,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436219693] [2021-07-09 17:29:28,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:29:28,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:29:28,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:28,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:28,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:28,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:28,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:28,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,270 INFO L628 ElimStorePlain]: treesize reduction 80, result has 35.0 percent of original size [2021-07-09 17:29:28,270 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:29:28,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:29:28,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:28,291 INFO L518 ElimStorePlain]: Eliminatee v_prenex_17 vanished before elimination [2021-07-09 17:29:28,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:28,293 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:29:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:28,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436219693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:28,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:28,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:29:28,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311873088] [2021-07-09 17:29:28,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:29:28,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:28,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:29:28,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:29:28,335 INFO L87 Difference]: Start difference. First operand 65 states and 137 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:28,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:28,509 INFO L93 Difference]: Finished difference Result 100 states and 201 transitions. [2021-07-09 17:29:28,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:29:28,510 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:28,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:28,510 INFO L225 Difference]: With dead ends: 100 [2021-07-09 17:29:28,510 INFO L226 Difference]: Without dead ends: 100 [2021-07-09 17:29:28,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:28,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-09 17:29:28,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 65. [2021-07-09 17:29:28,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.140625) internal successors, (137), 64 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:28,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 137 transitions. [2021-07-09 17:29:28,512 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 137 transitions. Word has length 15 [2021-07-09 17:29:28,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:28,512 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 137 transitions. [2021-07-09 17:29:28,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:28,513 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 137 transitions. [2021-07-09 17:29:28,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:28,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:28,513 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:28,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 17:29:28,726 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:28,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:28,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1520195082, now seen corresponding path program 16 times [2021-07-09 17:29:28,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:28,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579364950] [2021-07-09 17:29:28,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:28,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:28,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579364950] [2021-07-09 17:29:28,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579364950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:28,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489878381] [2021-07-09 17:29:28,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:28,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:28,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:28,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:28,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:28,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:28,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:29:28,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,969 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:29:28,969 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:29:28,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:29:28,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:28,984 INFO L518 ElimStorePlain]: Eliminatee v_prenex_20 vanished before elimination [2021-07-09 17:29:28,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:28,985 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:29:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:29,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489878381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:29,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:29,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:29,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992895329] [2021-07-09 17:29:29,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:29,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:29,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:29,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:29,008 INFO L87 Difference]: Start difference. First operand 65 states and 137 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:29,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:29,250 INFO L93 Difference]: Finished difference Result 87 states and 174 transitions. [2021-07-09 17:29:29,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:29,250 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:29,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:29,251 INFO L225 Difference]: With dead ends: 87 [2021-07-09 17:29:29,251 INFO L226 Difference]: Without dead ends: 87 [2021-07-09 17:29:29,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:29:29,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-09 17:29:29,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 61. [2021-07-09 17:29:29,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:29,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 128 transitions. [2021-07-09 17:29:29,253 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 128 transitions. Word has length 15 [2021-07-09 17:29:29,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:29,253 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 128 transitions. [2021-07-09 17:29:29,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:29,253 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 128 transitions. [2021-07-09 17:29:29,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:29,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:29,253 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:29,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:29,454 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:29,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:29,454 INFO L82 PathProgramCache]: Analyzing trace with hash -920894394, now seen corresponding path program 17 times [2021-07-09 17:29:29,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:29,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290865140] [2021-07-09 17:29:29,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:29,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:29,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290865140] [2021-07-09 17:29:29,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290865140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:29,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367720999] [2021-07-09 17:29:29,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:29,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:29,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:29,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:29,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:29,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367720999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:29,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:29,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:29,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139672655] [2021-07-09 17:29:29,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:29,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:29,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:29,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:29,620 INFO L87 Difference]: Start difference. First operand 61 states and 128 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:29,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:29,776 INFO L93 Difference]: Finished difference Result 71 states and 144 transitions. [2021-07-09 17:29:29,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:29,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:29,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:29,777 INFO L225 Difference]: With dead ends: 71 [2021-07-09 17:29:29,777 INFO L226 Difference]: Without dead ends: 65 [2021-07-09 17:29:29,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:29:29,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-07-09 17:29:29,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-07-09 17:29:29,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 130 transitions. [2021-07-09 17:29:29,779 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 130 transitions. Word has length 15 [2021-07-09 17:29:29,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:29,779 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 130 transitions. [2021-07-09 17:29:29,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:29,779 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 130 transitions. [2021-07-09 17:29:29,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:29,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:29,779 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:29,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-09 17:29:29,980 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:29,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:29,980 INFO L82 PathProgramCache]: Analyzing trace with hash 727164690, now seen corresponding path program 18 times [2021-07-09 17:29:29,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:29,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568039586] [2021-07-09 17:29:29,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:30,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:30,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568039586] [2021-07-09 17:29:30,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568039586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:30,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865644638] [2021-07-09 17:29:30,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:30,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:29:30,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:30,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:30,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:30,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:30,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:30,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,181 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-07-09 17:29:30,182 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:29:30,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,183 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:29:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:30,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865644638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:30,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:30,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:29:30,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74498592] [2021-07-09 17:29:30,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:29:30,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:30,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:29:30,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:29:30,198 INFO L87 Difference]: Start difference. First operand 62 states and 130 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:30,249 INFO L93 Difference]: Finished difference Result 73 states and 152 transitions. [2021-07-09 17:29:30,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:30,250 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:30,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:30,250 INFO L225 Difference]: With dead ends: 73 [2021-07-09 17:29:30,250 INFO L226 Difference]: Without dead ends: 73 [2021-07-09 17:29:30,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:29:30,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-07-09 17:29:30,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2021-07-09 17:29:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:30,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 130 transitions. [2021-07-09 17:29:30,252 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 130 transitions. Word has length 15 [2021-07-09 17:29:30,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:30,252 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 130 transitions. [2021-07-09 17:29:30,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:30,252 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 130 transitions. [2021-07-09 17:29:30,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:30,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:30,253 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:30,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-07-09 17:29:30,461 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:30,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:30,461 INFO L82 PathProgramCache]: Analyzing trace with hash -58889330, now seen corresponding path program 19 times [2021-07-09 17:29:30,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:30,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839124165] [2021-07-09 17:29:30,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:30,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:30,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839124165] [2021-07-09 17:29:30,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839124165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:30,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114607750] [2021-07-09 17:29:30,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:30,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:30,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:30,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:29:30,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:30,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,650 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:29:30,650 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:29:30,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:29:30,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:30,667 INFO L518 ElimStorePlain]: Eliminatee v_prenex_22 vanished before elimination [2021-07-09 17:29:30,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:30,668 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:29:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:30,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114607750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:30,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:30,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:30,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380814441] [2021-07-09 17:29:30,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:30,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:30,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:30,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:30,696 INFO L87 Difference]: Start difference. First operand 62 states and 130 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:30,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:30,879 INFO L93 Difference]: Finished difference Result 84 states and 165 transitions. [2021-07-09 17:29:30,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:30,879 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:30,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:30,879 INFO L225 Difference]: With dead ends: 84 [2021-07-09 17:29:30,879 INFO L226 Difference]: Without dead ends: 81 [2021-07-09 17:29:30,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 180.3ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:29:30,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-09 17:29:30,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2021-07-09 17:29:30,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 66 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:30,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 141 transitions. [2021-07-09 17:29:30,882 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 141 transitions. Word has length 15 [2021-07-09 17:29:30,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:30,882 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 141 transitions. [2021-07-09 17:29:30,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:30,882 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 141 transitions. [2021-07-09 17:29:30,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:30,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:30,882 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:31,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:31,085 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:31,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:31,085 INFO L82 PathProgramCache]: Analyzing trace with hash -282820798, now seen corresponding path program 20 times [2021-07-09 17:29:31,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:31,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076228194] [2021-07-09 17:29:31,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:31,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:31,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076228194] [2021-07-09 17:29:31,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076228194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:31,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376940457] [2021-07-09 17:29:31,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:31,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:31,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:31,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:31,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:31,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:31,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:31,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:31,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:31,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:31,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:31,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:31,280 INFO L628 ElimStorePlain]: treesize reduction 78, result has 35.5 percent of original size [2021-07-09 17:29:31,280 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:29:31,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:29:31,284 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:31,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:31,308 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-07-09 17:29:31,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:31,314 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:29:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:31,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376940457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:31,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:31,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:29:31,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019451303] [2021-07-09 17:29:31,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:29:31,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:31,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:29:31,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:29:31,349 INFO L87 Difference]: Start difference. First operand 67 states and 141 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:31,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:31,415 INFO L93 Difference]: Finished difference Result 86 states and 179 transitions. [2021-07-09 17:29:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:31,415 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:31,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:31,415 INFO L225 Difference]: With dead ends: 86 [2021-07-09 17:29:31,416 INFO L226 Difference]: Without dead ends: 86 [2021-07-09 17:29:31,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:29:31,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-07-09 17:29:31,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2021-07-09 17:29:31,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 66 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:31,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 141 transitions. [2021-07-09 17:29:31,418 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 141 transitions. Word has length 15 [2021-07-09 17:29:31,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:31,418 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 141 transitions. [2021-07-09 17:29:31,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:31,418 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 141 transitions. [2021-07-09 17:29:31,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:31,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:31,418 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:31,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-07-09 17:29:31,619 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:31,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:31,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1077295942, now seen corresponding path program 21 times [2021-07-09 17:29:31,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:31,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347618143] [2021-07-09 17:29:31,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:31,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:31,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347618143] [2021-07-09 17:29:31,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347618143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:31,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938448236] [2021-07-09 17:29:31,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:31,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:29:31,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:31,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:31,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:31,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:31,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:31,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:29:31,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:31,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:31,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:31,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:31,802 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:29:31,803 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:29:31,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:29:31,806 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:31,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:31,817 INFO L518 ElimStorePlain]: Eliminatee v_prenex_28 vanished before elimination [2021-07-09 17:29:31,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:31,818 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:29:31,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:31,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938448236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:31,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:31,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:31,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352425773] [2021-07-09 17:29:31,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:31,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:31,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:31,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:31,840 INFO L87 Difference]: Start difference. First operand 67 states and 141 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:31,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:31,961 INFO L93 Difference]: Finished difference Result 69 states and 144 transitions. [2021-07-09 17:29:31,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:31,962 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:31,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:31,962 INFO L225 Difference]: With dead ends: 69 [2021-07-09 17:29:31,962 INFO L226 Difference]: Without dead ends: 69 [2021-07-09 17:29:31,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:29:31,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-07-09 17:29:31,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2021-07-09 17:29:31,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:31,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 128 transitions. [2021-07-09 17:29:31,964 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 128 transitions. Word has length 15 [2021-07-09 17:29:31,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:31,964 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 128 transitions. [2021-07-09 17:29:31,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:31,964 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 128 transitions. [2021-07-09 17:29:31,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:31,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:31,964 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:32,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-07-09 17:29:32,177 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:32,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:32,177 INFO L82 PathProgramCache]: Analyzing trace with hash 2129293846, now seen corresponding path program 22 times [2021-07-09 17:29:32,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:32,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370397080] [2021-07-09 17:29:32,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:32,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:32,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370397080] [2021-07-09 17:29:32,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370397080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:32,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925089442] [2021-07-09 17:29:32,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:32,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:32,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:32,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:32,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:32,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:32,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:32,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:29:32,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:32,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:29:32,346 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:32,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:32,349 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:32,383 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:29:32,383 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:29:32,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:32,384 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:29:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:32,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925089442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:32,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:32,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:32,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306675915] [2021-07-09 17:29:32,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:32,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:32,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:32,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:32,410 INFO L87 Difference]: Start difference. First operand 61 states and 128 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:32,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:32,532 INFO L93 Difference]: Finished difference Result 89 states and 172 transitions. [2021-07-09 17:29:32,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:32,532 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:32,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:32,532 INFO L225 Difference]: With dead ends: 89 [2021-07-09 17:29:32,533 INFO L226 Difference]: Without dead ends: 86 [2021-07-09 17:29:32,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:32,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-07-09 17:29:32,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2021-07-09 17:29:32,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 65 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:32,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 139 transitions. [2021-07-09 17:29:32,535 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 139 transitions. Word has length 15 [2021-07-09 17:29:32,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:32,535 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 139 transitions. [2021-07-09 17:29:32,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:32,536 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 139 transitions. [2021-07-09 17:29:32,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:32,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:32,536 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:32,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:32,749 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:32,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:32,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1739535948, now seen corresponding path program 23 times [2021-07-09 17:29:32,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:32,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136772481] [2021-07-09 17:29:32,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:32,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:32,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136772481] [2021-07-09 17:29:32,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136772481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:32,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126257602] [2021-07-09 17:29:32,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:32,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:29:32,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:32,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:32,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:32,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126257602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:32,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:32,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:32,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965877200] [2021-07-09 17:29:32,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:32,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:32,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:32,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:32,904 INFO L87 Difference]: Start difference. First operand 66 states and 139 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:32,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:32,986 INFO L93 Difference]: Finished difference Result 91 states and 177 transitions. [2021-07-09 17:29:32,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:32,987 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:32,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:32,987 INFO L225 Difference]: With dead ends: 91 [2021-07-09 17:29:32,987 INFO L226 Difference]: Without dead ends: 91 [2021-07-09 17:29:32,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:29:32,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-09 17:29:32,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 64. [2021-07-09 17:29:32,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:32,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-07-09 17:29:32,990 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-07-09 17:29:32,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:32,990 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-07-09 17:29:32,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:32,990 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-07-09 17:29:32,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:32,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:32,990 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:33,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-07-09 17:29:33,206 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:33,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:33,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1029488178, now seen corresponding path program 24 times [2021-07-09 17:29:33,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:33,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160485497] [2021-07-09 17:29:33,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:33,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:33,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160485497] [2021-07-09 17:29:33,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160485497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:33,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219579951] [2021-07-09 17:29:33,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:33,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:29:33,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:33,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:33,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:33,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:29:33,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:33,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:29:33,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:33,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:33,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:33,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:33,362 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:33,409 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:29:33,409 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:29:33,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:33,410 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:29:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:33,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219579951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:33,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:33,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:29:33,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580296713] [2021-07-09 17:29:33,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:29:33,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:33,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:29:33,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:29:33,450 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:33,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:33,576 INFO L93 Difference]: Finished difference Result 87 states and 167 transitions. [2021-07-09 17:29:33,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:33,577 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:33,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:33,577 INFO L225 Difference]: With dead ends: 87 [2021-07-09 17:29:33,577 INFO L226 Difference]: Without dead ends: 87 [2021-07-09 17:29:33,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 136.1ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:29:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-09 17:29:33,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2021-07-09 17:29:33,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:33,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 129 transitions. [2021-07-09 17:29:33,579 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 129 transitions. Word has length 15 [2021-07-09 17:29:33,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:33,579 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 129 transitions. [2021-07-09 17:29:33,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:33,579 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 129 transitions. [2021-07-09 17:29:33,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:33,579 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:33,579 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:33,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 17:29:33,796 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:33,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:33,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1032427124, now seen corresponding path program 25 times [2021-07-09 17:29:33,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:33,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237952865] [2021-07-09 17:29:33,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:33,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:33,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:33,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237952865] [2021-07-09 17:29:33,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237952865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:33,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840664225] [2021-07-09 17:29:33,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:33,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:33,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:33,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840664225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:33,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:33,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:33,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310432513] [2021-07-09 17:29:33,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:33,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:33,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:33,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:33,931 INFO L87 Difference]: Start difference. First operand 63 states and 129 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:34,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:34,049 INFO L93 Difference]: Finished difference Result 70 states and 139 transitions. [2021-07-09 17:29:34,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:34,050 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:34,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:34,050 INFO L225 Difference]: With dead ends: 70 [2021-07-09 17:29:34,050 INFO L226 Difference]: Without dead ends: 66 [2021-07-09 17:29:34,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:29:34,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-07-09 17:29:34,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2021-07-09 17:29:34,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:34,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 128 transitions. [2021-07-09 17:29:34,052 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 128 transitions. Word has length 15 [2021-07-09 17:29:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:34,052 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 128 transitions. [2021-07-09 17:29:34,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 128 transitions. [2021-07-09 17:29:34,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:34,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:34,052 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:34,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-09 17:29:34,269 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:34,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:34,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1119308358, now seen corresponding path program 26 times [2021-07-09 17:29:34,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:34,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266809987] [2021-07-09 17:29:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:34,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:34,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:34,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266809987] [2021-07-09 17:29:34,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266809987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:34,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052573112] [2021-07-09 17:29:34,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:34,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:34,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:34,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:34,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:34,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:34,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:34,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:29:34,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:34,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:34,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:34,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:34,436 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:29:34,436 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:29:34,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:34,436 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:29:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:34,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052573112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:34,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:34,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:34,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279341912] [2021-07-09 17:29:34,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:34,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:34,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:34,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:34,444 INFO L87 Difference]: Start difference. First operand 63 states and 128 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:34,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:34,485 INFO L93 Difference]: Finished difference Result 70 states and 140 transitions. [2021-07-09 17:29:34,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:34,486 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:34,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:34,486 INFO L225 Difference]: With dead ends: 70 [2021-07-09 17:29:34,486 INFO L226 Difference]: Without dead ends: 70 [2021-07-09 17:29:34,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:34,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-07-09 17:29:34,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2021-07-09 17:29:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:34,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 119 transitions. [2021-07-09 17:29:34,489 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 119 transitions. Word has length 15 [2021-07-09 17:29:34,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:34,489 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 119 transitions. [2021-07-09 17:29:34,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:34,489 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 119 transitions. [2021-07-09 17:29:34,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:34,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:34,490 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:34,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-07-09 17:29:34,701 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:34,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:34,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1684129998, now seen corresponding path program 27 times [2021-07-09 17:29:34,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:34,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679300095] [2021-07-09 17:29:34,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:34,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:34,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679300095] [2021-07-09 17:29:34,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679300095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:34,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814742733] [2021-07-09 17:29:34,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:34,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:29:34,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:34,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:34,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:34,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814742733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:34,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:34,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:34,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851965507] [2021-07-09 17:29:34,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:34,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:34,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:34,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:34,871 INFO L87 Difference]: Start difference. First operand 59 states and 119 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:34,989 INFO L93 Difference]: Finished difference Result 69 states and 134 transitions. [2021-07-09 17:29:34,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:34,989 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:34,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:34,990 INFO L225 Difference]: With dead ends: 69 [2021-07-09 17:29:34,990 INFO L226 Difference]: Without dead ends: 63 [2021-07-09 17:29:34,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:29:34,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-07-09 17:29:34,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2021-07-09 17:29:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:34,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 118 transitions. [2021-07-09 17:29:34,991 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 118 transitions. Word has length 15 [2021-07-09 17:29:34,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:34,992 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 118 transitions. [2021-07-09 17:29:34,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 118 transitions. [2021-07-09 17:29:34,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:34,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:34,992 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:35,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:35,192 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:35,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:35,193 INFO L82 PathProgramCache]: Analyzing trace with hash -962778214, now seen corresponding path program 28 times [2021-07-09 17:29:35,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:35,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482597201] [2021-07-09 17:29:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:35,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:35,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482597201] [2021-07-09 17:29:35,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482597201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:35,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750777872] [2021-07-09 17:29:35,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:29:35,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:35,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:35,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:35,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:35,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:29:35,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:35,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,359 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:29:35,359 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:29:35,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,360 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:29:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:35,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750777872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:35,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:35,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:35,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584689430] [2021-07-09 17:29:35,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:35,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:35,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:35,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:35,364 INFO L87 Difference]: Start difference. First operand 59 states and 118 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:35,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:35,396 INFO L93 Difference]: Finished difference Result 67 states and 134 transitions. [2021-07-09 17:29:35,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:35,397 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:35,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:35,397 INFO L225 Difference]: With dead ends: 67 [2021-07-09 17:29:35,397 INFO L226 Difference]: Without dead ends: 67 [2021-07-09 17:29:35,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:35,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-07-09 17:29:35,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2021-07-09 17:29:35,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 118 transitions. [2021-07-09 17:29:35,399 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 118 transitions. Word has length 15 [2021-07-09 17:29:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:35,399 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 118 transitions. [2021-07-09 17:29:35,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 118 transitions. [2021-07-09 17:29:35,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:35,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:35,399 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:35,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-09 17:29:35,608 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:35,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:35,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1748832234, now seen corresponding path program 29 times [2021-07-09 17:29:35,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:35,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561526807] [2021-07-09 17:29:35,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:35,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:35,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561526807] [2021-07-09 17:29:35,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561526807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:35,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839944473] [2021-07-09 17:29:35,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:35,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:35,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:35,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:35,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:35,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839944473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:35,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:35,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:35,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622309683] [2021-07-09 17:29:35,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:35,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:35,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:35,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:35,780 INFO L87 Difference]: Start difference. First operand 59 states and 118 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:35,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:35,941 INFO L93 Difference]: Finished difference Result 77 states and 144 transitions. [2021-07-09 17:29:35,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:35,942 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:35,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:35,942 INFO L225 Difference]: With dead ends: 77 [2021-07-09 17:29:35,942 INFO L226 Difference]: Without dead ends: 74 [2021-07-09 17:29:35,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:29:35,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-07-09 17:29:35,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2021-07-09 17:29:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:35,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-07-09 17:29:35,947 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2021-07-09 17:29:35,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:35,947 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-07-09 17:29:35,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:35,947 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-07-09 17:29:35,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:35,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:35,947 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:36,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:36,149 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:36,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:36,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1972763702, now seen corresponding path program 30 times [2021-07-09 17:29:36,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:36,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253521178] [2021-07-09 17:29:36,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:36,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:36,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:36,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253521178] [2021-07-09 17:29:36,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253521178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:36,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795761217] [2021-07-09 17:29:36,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:36,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:29:36,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:36,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:36,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:36,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:36,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:36,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:36,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:36,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:36,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:36,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:36,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:36,329 INFO L628 ElimStorePlain]: treesize reduction 73, result has 38.7 percent of original size [2021-07-09 17:29:36,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:29:36,333 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:36,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:36,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:36,350 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-07-09 17:29:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:36,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795761217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:36,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:36,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:29:36,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413204341] [2021-07-09 17:29:36,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:29:36,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:36,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:29:36,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:29:36,383 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:36,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:36,440 INFO L93 Difference]: Finished difference Result 79 states and 158 transitions. [2021-07-09 17:29:36,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:36,441 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:36,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:36,441 INFO L225 Difference]: With dead ends: 79 [2021-07-09 17:29:36,441 INFO L226 Difference]: Without dead ends: 79 [2021-07-09 17:29:36,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:29:36,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-09 17:29:36,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2021-07-09 17:29:36,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:36,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-07-09 17:29:36,443 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2021-07-09 17:29:36,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:36,443 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-07-09 17:29:36,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:36,443 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-07-09 17:29:36,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:36,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:36,443 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:36,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:36,657 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:36,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:36,657 INFO L82 PathProgramCache]: Analyzing trace with hash -612646962, now seen corresponding path program 31 times [2021-07-09 17:29:36,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:36,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742565433] [2021-07-09 17:29:36,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:36,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:36,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742565433] [2021-07-09 17:29:36,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742565433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:36,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389101921] [2021-07-09 17:29:36,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:29:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:36,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:36,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:36,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389101921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:36,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:36,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:36,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624685031] [2021-07-09 17:29:36,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:36,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:36,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:36,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:36,813 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:36,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:36,888 INFO L93 Difference]: Finished difference Result 62 states and 123 transitions. [2021-07-09 17:29:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:36,889 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:36,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:36,889 INFO L225 Difference]: With dead ends: 62 [2021-07-09 17:29:36,889 INFO L226 Difference]: Without dead ends: 62 [2021-07-09 17:29:36,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:29:36,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-07-09 17:29:36,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2021-07-09 17:29:36,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:36,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 113 transitions. [2021-07-09 17:29:36,891 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 113 transitions. Word has length 15 [2021-07-09 17:29:36,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:36,891 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 113 transitions. [2021-07-09 17:29:36,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 113 transitions. [2021-07-09 17:29:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:36,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:36,891 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:37,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:37,100 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:37,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:37,101 INFO L82 PathProgramCache]: Analyzing trace with hash 439350942, now seen corresponding path program 32 times [2021-07-09 17:29:37,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:37,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461272466] [2021-07-09 17:29:37,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:37,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:37,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461272466] [2021-07-09 17:29:37,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461272466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:37,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582887908] [2021-07-09 17:29:37,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:37,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:37,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:37,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:37,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:37,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582887908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:37,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:37,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:37,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412924894] [2021-07-09 17:29:37,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:37,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:37,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:37,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:37,295 INFO L87 Difference]: Start difference. First operand 57 states and 113 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:37,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:37,390 INFO L93 Difference]: Finished difference Result 84 states and 158 transitions. [2021-07-09 17:29:37,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:37,390 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:37,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:37,390 INFO L225 Difference]: With dead ends: 84 [2021-07-09 17:29:37,390 INFO L226 Difference]: Without dead ends: 81 [2021-07-09 17:29:37,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:29:37,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-09 17:29:37,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2021-07-09 17:29:37,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:37,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-07-09 17:29:37,392 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-07-09 17:29:37,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:37,392 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-07-09 17:29:37,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:37,392 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-07-09 17:29:37,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:37,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:37,392 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:37,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable174 [2021-07-09 17:29:37,593 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:37,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:37,593 INFO L82 PathProgramCache]: Analyzing trace with hash 215419474, now seen corresponding path program 33 times [2021-07-09 17:29:37,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:37,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464228264] [2021-07-09 17:29:37,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:37,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:37,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464228264] [2021-07-09 17:29:37,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464228264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:37,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363539877] [2021-07-09 17:29:37,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:37,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:29:37,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:37,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:37,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:37,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:37,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:29:37,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,785 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:29:37,785 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:29:37,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:29:37,788 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:37,800 INFO L518 ElimStorePlain]: Eliminatee v_prenex_31 vanished before elimination [2021-07-09 17:29:37,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:37,800 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:29:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:37,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363539877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:37,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:37,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:37,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957227352] [2021-07-09 17:29:37,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:37,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:37,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:37,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:37,823 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:37,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:37,936 INFO L93 Difference]: Finished difference Result 83 states and 160 transitions. [2021-07-09 17:29:37,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:37,936 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:37,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:37,937 INFO L225 Difference]: With dead ends: 83 [2021-07-09 17:29:37,937 INFO L226 Difference]: Without dead ends: 83 [2021-07-09 17:29:37,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:29:37,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-09 17:29:37,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2021-07-09 17:29:37,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:37,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-07-09 17:29:37,938 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-07-09 17:29:37,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:37,938 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-07-09 17:29:37,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:37,938 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-07-09 17:29:37,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:37,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:37,939 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:38,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:38,153 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:38,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:38,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1195371358, now seen corresponding path program 34 times [2021-07-09 17:29:38,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:38,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164894877] [2021-07-09 17:29:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:38,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:38,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164894877] [2021-07-09 17:29:38,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164894877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:38,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999893070] [2021-07-09 17:29:38,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:38,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:38,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:38,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:38,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:38,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:38,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:38,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:29:38,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:38,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:38,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:38,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:38,356 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:29:38,356 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:29:38,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:29:38,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:38,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:38,371 INFO L518 ElimStorePlain]: Eliminatee v_prenex_34 vanished before elimination [2021-07-09 17:29:38,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:38,372 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:29:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:38,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999893070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:38,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:38,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:38,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314681214] [2021-07-09 17:29:38,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:38,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:38,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:38,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:38,396 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:38,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:38,541 INFO L93 Difference]: Finished difference Result 85 states and 161 transitions. [2021-07-09 17:29:38,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:29:38,542 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:38,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:38,542 INFO L225 Difference]: With dead ends: 85 [2021-07-09 17:29:38,542 INFO L226 Difference]: Without dead ends: 83 [2021-07-09 17:29:38,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:38,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-09 17:29:38,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2021-07-09 17:29:38,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 63 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:38,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2021-07-09 17:29:38,544 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 15 [2021-07-09 17:29:38,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:38,544 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2021-07-09 17:29:38,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:38,545 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2021-07-09 17:29:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:38,545 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:38,545 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:38,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-07-09 17:29:38,761 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:38,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:38,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1575536214, now seen corresponding path program 35 times [2021-07-09 17:29:38,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:38,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322229533] [2021-07-09 17:29:38,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:38,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:38,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322229533] [2021-07-09 17:29:38,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322229533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:38,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854267823] [2021-07-09 17:29:38,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:38,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:29:38,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:38,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:38,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:38,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854267823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:38,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:38,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:29:38,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348794140] [2021-07-09 17:29:38,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:29:38,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:38,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:29:38,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:29:38,914 INFO L87 Difference]: Start difference. First operand 64 states and 130 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:39,040 INFO L93 Difference]: Finished difference Result 84 states and 160 transitions. [2021-07-09 17:29:39,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:39,041 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:39,041 INFO L225 Difference]: With dead ends: 84 [2021-07-09 17:29:39,041 INFO L226 Difference]: Without dead ends: 84 [2021-07-09 17:29:39,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:39,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-09 17:29:39,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2021-07-09 17:29:39,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:39,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 128 transitions. [2021-07-09 17:29:39,044 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 128 transitions. Word has length 15 [2021-07-09 17:29:39,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:39,044 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 128 transitions. [2021-07-09 17:29:39,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:39,044 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 128 transitions. [2021-07-09 17:29:39,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:39,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:39,044 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:39,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-09 17:29:39,260 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:39,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:39,261 INFO L82 PathProgramCache]: Analyzing trace with hash -657515780, now seen corresponding path program 36 times [2021-07-09 17:29:39,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:39,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515402448] [2021-07-09 17:29:39,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:39,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:39,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:39,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515402448] [2021-07-09 17:29:39,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515402448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:39,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468248042] [2021-07-09 17:29:39,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:39,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:29:39,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:39,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:39,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:39,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468248042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:39,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:39,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:39,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640596720] [2021-07-09 17:29:39,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:39,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:39,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:39,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:39,434 INFO L87 Difference]: Start difference. First operand 63 states and 128 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:39,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:39,510 INFO L93 Difference]: Finished difference Result 67 states and 132 transitions. [2021-07-09 17:29:39,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:39,511 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:39,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:39,511 INFO L225 Difference]: With dead ends: 67 [2021-07-09 17:29:39,511 INFO L226 Difference]: Without dead ends: 63 [2021-07-09 17:29:39,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:29:39,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-07-09 17:29:39,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-07-09 17:29:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 62 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:39,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 127 transitions. [2021-07-09 17:29:39,512 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 127 transitions. Word has length 15 [2021-07-09 17:29:39,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:39,513 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 127 transitions. [2021-07-09 17:29:39,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:39,513 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 127 transitions. [2021-07-09 17:29:39,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:39,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:39,513 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:39,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-07-09 17:29:39,729 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:39,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:39,729 INFO L82 PathProgramCache]: Analyzing trace with hash -570634546, now seen corresponding path program 37 times [2021-07-09 17:29:39,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:39,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271290824] [2021-07-09 17:29:39,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:39,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:39,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271290824] [2021-07-09 17:29:39,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271290824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:39,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512773933] [2021-07-09 17:29:39,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:39,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:39,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:39,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512773933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:39,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:39,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:39,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972258692] [2021-07-09 17:29:39,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:39,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:39,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:39,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:39,913 INFO L87 Difference]: Start difference. First operand 63 states and 127 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:39,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:39,993 INFO L93 Difference]: Finished difference Result 67 states and 133 transitions. [2021-07-09 17:29:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:40,011 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:40,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:40,011 INFO L225 Difference]: With dead ends: 67 [2021-07-09 17:29:40,012 INFO L226 Difference]: Without dead ends: 67 [2021-07-09 17:29:40,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:40,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-07-09 17:29:40,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2021-07-09 17:29:40,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:40,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-07-09 17:29:40,013 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 15 [2021-07-09 17:29:40,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:40,013 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-07-09 17:29:40,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:40,013 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-07-09 17:29:40,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:40,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:40,014 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:40,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-07-09 17:29:40,214 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:40,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:40,214 INFO L82 PathProgramCache]: Analyzing trace with hash -889346478, now seen corresponding path program 38 times [2021-07-09 17:29:40,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:40,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438445365] [2021-07-09 17:29:40,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:40,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:40,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438445365] [2021-07-09 17:29:40,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438445365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:40,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855859880] [2021-07-09 17:29:40,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:40,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:40,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:40,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:40,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:40,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:40,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:40,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:40,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:40,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:40,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:40,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:40,433 INFO L628 ElimStorePlain]: treesize reduction 70, result has 41.2 percent of original size [2021-07-09 17:29:40,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:40,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:29:40,438 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:40,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:40,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:29:40,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:40,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:40,472 INFO L518 ElimStorePlain]: Eliminatee v_prenex_38 vanished before elimination [2021-07-09 17:29:40,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:40,473 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:29:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:40,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855859880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:40,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:40,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:40,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28226393] [2021-07-09 17:29:40,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:40,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:40,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:40,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:40,501 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:40,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:40,666 INFO L93 Difference]: Finished difference Result 96 states and 176 transitions. [2021-07-09 17:29:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:29:40,667 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:40,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:40,667 INFO L225 Difference]: With dead ends: 96 [2021-07-09 17:29:40,667 INFO L226 Difference]: Without dead ends: 93 [2021-07-09 17:29:40,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 182.3ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:29:40,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-09 17:29:40,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2021-07-09 17:29:40,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-07-09 17:29:40,669 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-07-09 17:29:40,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:40,669 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-07-09 17:29:40,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:40,669 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-07-09 17:29:40,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:40,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:40,669 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:40,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:40,870 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:40,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:40,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1113277946, now seen corresponding path program 39 times [2021-07-09 17:29:40,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:40,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040069974] [2021-07-09 17:29:40,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:40,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:40,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:40,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040069974] [2021-07-09 17:29:40,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040069974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:40,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654696548] [2021-07-09 17:29:40,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:40,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:29:40,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:40,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:40,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:41,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:29:41,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:41,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,067 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:29:41,068 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:29:41,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:29:41,070 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:41,082 INFO L518 ElimStorePlain]: Eliminatee v_prenex_41 vanished before elimination [2021-07-09 17:29:41,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:41,083 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:29:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:41,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654696548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:41,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:41,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:41,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994955188] [2021-07-09 17:29:41,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:41,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:41,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:41,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:41,108 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:41,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:41,330 INFO L93 Difference]: Finished difference Result 80 states and 151 transitions. [2021-07-09 17:29:41,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:41,330 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:41,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:41,331 INFO L225 Difference]: With dead ends: 80 [2021-07-09 17:29:41,331 INFO L226 Difference]: Without dead ends: 80 [2021-07-09 17:29:41,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:29:41,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-09 17:29:41,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2021-07-09 17:29:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:41,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-07-09 17:29:41,332 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-07-09 17:29:41,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:41,332 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-07-09 17:29:41,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:41,333 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-07-09 17:29:41,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:41,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:41,333 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:41,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-07-09 17:29:41,533 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:41,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:41,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1770898518, now seen corresponding path program 40 times [2021-07-09 17:29:41,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:41,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799229692] [2021-07-09 17:29:41,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:41,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:41,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799229692] [2021-07-09 17:29:41,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799229692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:41,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024665938] [2021-07-09 17:29:41,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:41,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:41,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:41,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:41,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:41,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:41,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:29:41,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,751 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:29:41,751 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:29:41,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:29:41,753 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:41,765 INFO L518 ElimStorePlain]: Eliminatee v_prenex_44 vanished before elimination [2021-07-09 17:29:41,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:41,766 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:29:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:41,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024665938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:41,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:41,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:41,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058364432] [2021-07-09 17:29:41,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:41,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:41,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:41,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:41,789 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:42,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:42,169 INFO L93 Difference]: Finished difference Result 82 states and 152 transitions. [2021-07-09 17:29:42,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:29:42,173 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:42,173 INFO L225 Difference]: With dead ends: 82 [2021-07-09 17:29:42,173 INFO L226 Difference]: Without dead ends: 80 [2021-07-09 17:29:42,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 396.7ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:42,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-09 17:29:42,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2021-07-09 17:29:42,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 60 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:42,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 121 transitions. [2021-07-09 17:29:42,175 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 121 transitions. Word has length 15 [2021-07-09 17:29:42,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:42,175 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 121 transitions. [2021-07-09 17:29:42,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:42,175 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 121 transitions. [2021-07-09 17:29:42,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:42,175 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:42,175 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:42,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:42,389 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:42,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:42,389 INFO L82 PathProgramCache]: Analyzing trace with hash 246838794, now seen corresponding path program 41 times [2021-07-09 17:29:42,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:42,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134141078] [2021-07-09 17:29:42,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:42,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:42,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134141078] [2021-07-09 17:29:42,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134141078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:42,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939151398] [2021-07-09 17:29:42,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:42,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:29:42,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:42,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:42,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:42,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939151398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:42,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:42,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:42,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012923155] [2021-07-09 17:29:42,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:42,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:42,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:42,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:42,578 INFO L87 Difference]: Start difference. First operand 61 states and 121 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:42,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:42,689 INFO L93 Difference]: Finished difference Result 92 states and 166 transitions. [2021-07-09 17:29:42,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:42,690 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:42,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:42,690 INFO L225 Difference]: With dead ends: 92 [2021-07-09 17:29:42,690 INFO L226 Difference]: Without dead ends: 92 [2021-07-09 17:29:42,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:29:42,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-09 17:29:42,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2021-07-09 17:29:42,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:42,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-07-09 17:29:42,692 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-07-09 17:29:42,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:42,692 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-07-09 17:29:42,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:42,692 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-07-09 17:29:42,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:42,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:42,692 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:42,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:42,908 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:42,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:42,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1986213200, now seen corresponding path program 42 times [2021-07-09 17:29:42,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:42,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758389106] [2021-07-09 17:29:42,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:42,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:42,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758389106] [2021-07-09 17:29:42,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758389106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:42,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487101053] [2021-07-09 17:29:42,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:42,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:29:42,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:42,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:42,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:43,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487101053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:43,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:43,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:43,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87245810] [2021-07-09 17:29:43,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:43,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:43,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:43,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:43,085 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:43,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:43,189 INFO L93 Difference]: Finished difference Result 79 states and 144 transitions. [2021-07-09 17:29:43,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:43,190 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:43,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:43,190 INFO L225 Difference]: With dead ends: 79 [2021-07-09 17:29:43,190 INFO L226 Difference]: Without dead ends: 75 [2021-07-09 17:29:43,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:29:43,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-07-09 17:29:43,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2021-07-09 17:29:43,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0) internal successors, (118), 59 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 118 transitions. [2021-07-09 17:29:43,192 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 118 transitions. Word has length 15 [2021-07-09 17:29:43,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:43,192 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 118 transitions. [2021-07-09 17:29:43,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:43,192 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 118 transitions. [2021-07-09 17:29:43,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:43,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:43,192 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:43,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:43,401 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:43,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:43,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1899331966, now seen corresponding path program 43 times [2021-07-09 17:29:43,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:43,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555311268] [2021-07-09 17:29:43,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:43,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:43,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555311268] [2021-07-09 17:29:43,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555311268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:43,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044515048] [2021-07-09 17:29:43,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:29:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:43,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:29:43,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:43,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044515048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:43,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:43,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:43,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020735136] [2021-07-09 17:29:43,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:43,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:43,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:43,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:43,574 INFO L87 Difference]: Start difference. First operand 60 states and 118 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:43,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:43,682 INFO L93 Difference]: Finished difference Result 89 states and 166 transitions. [2021-07-09 17:29:43,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:43,682 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:43,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:43,682 INFO L225 Difference]: With dead ends: 89 [2021-07-09 17:29:43,682 INFO L226 Difference]: Without dead ends: 89 [2021-07-09 17:29:43,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:43,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-09 17:29:43,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2021-07-09 17:29:43,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0) internal successors, (116), 58 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:43,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 116 transitions. [2021-07-09 17:29:43,684 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 116 transitions. Word has length 15 [2021-07-09 17:29:43,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:43,684 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 116 transitions. [2021-07-09 17:29:43,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:43,684 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 116 transitions. [2021-07-09 17:29:43,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:43,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:43,685 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:43,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-07-09 17:29:43,893 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:43,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:43,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1398467878, now seen corresponding path program 44 times [2021-07-09 17:29:43,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:43,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742211806] [2021-07-09 17:29:43,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:43,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:43,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742211806] [2021-07-09 17:29:43,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742211806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:43,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685410223] [2021-07-09 17:29:43,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:43,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:43,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:43,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:43,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:44,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685410223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:44,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:44,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:44,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077616865] [2021-07-09 17:29:44,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:44,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:44,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:44,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:44,024 INFO L87 Difference]: Start difference. First operand 59 states and 116 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:44,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:44,143 INFO L93 Difference]: Finished difference Result 63 states and 120 transitions. [2021-07-09 17:29:44,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:44,143 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:44,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:44,144 INFO L225 Difference]: With dead ends: 63 [2021-07-09 17:29:44,144 INFO L226 Difference]: Without dead ends: 57 [2021-07-09 17:29:44,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:44,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-07-09 17:29:44,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-07-09 17:29:44,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:44,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-07-09 17:29:44,145 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 15 [2021-07-09 17:29:44,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:44,145 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-07-09 17:29:44,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:44,145 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-07-09 17:29:44,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:29:44,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:44,146 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:44,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-07-09 17:29:44,353 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:44,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:44,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1382942798, now seen corresponding path program 45 times [2021-07-09 17:29:44,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:44,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749169566] [2021-07-09 17:29:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:44,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:44,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749169566] [2021-07-09 17:29:44,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749169566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:44,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020880923] [2021-07-09 17:29:44,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:44,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:29:44,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:44,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:29:44,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:44,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:29:44,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:29:44,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,480 INFO L628 ElimStorePlain]: treesize reduction 19, result has 38.7 percent of original size [2021-07-09 17:29:44,480 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:29:44,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,481 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:12 [2021-07-09 17:29:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:44,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020880923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:44,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:44,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:29:44,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801598611] [2021-07-09 17:29:44,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:29:44,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:44,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:29:44,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:29:44,496 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:44,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:44,553 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2021-07-09 17:29:44,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:29:44,553 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:29:44,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:44,553 INFO L225 Difference]: With dead ends: 64 [2021-07-09 17:29:44,553 INFO L226 Difference]: Without dead ends: 64 [2021-07-09 17:29:44,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:29:44,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-07-09 17:29:44,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2021-07-09 17:29:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 51 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:44,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 100 transitions. [2021-07-09 17:29:44,555 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 100 transitions. Word has length 15 [2021-07-09 17:29:44,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:44,555 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 100 transitions. [2021-07-09 17:29:44,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:44,555 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 100 transitions. [2021-07-09 17:29:44,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:29:44,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:44,555 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:44,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:44,756 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:44,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1355148170, now seen corresponding path program 46 times [2021-07-09 17:29:44,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:44,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80346561] [2021-07-09 17:29:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:44,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:44,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80346561] [2021-07-09 17:29:44,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80346561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:44,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560739262] [2021-07-09 17:29:44,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:44,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:44,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:44,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:29:44,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:44,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:29:44,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:44,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:45,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:45,013 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:29:45,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:45,013 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:76, output treesize:37 [2021-07-09 17:29:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:45,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560739262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:45,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:45,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 17:29:45,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650170702] [2021-07-09 17:29:45,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:29:45,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:45,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:29:45,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:45,073 INFO L87 Difference]: Start difference. First operand 52 states and 100 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:45,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:45,297 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-07-09 17:29:45,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:45,297 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:29:45,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:45,297 INFO L225 Difference]: With dead ends: 98 [2021-07-09 17:29:45,297 INFO L226 Difference]: Without dead ends: 91 [2021-07-09 17:29:45,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 313.1ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:45,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-09 17:29:45,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 62. [2021-07-09 17:29:45,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 119 transitions. [2021-07-09 17:29:45,299 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 119 transitions. Word has length 16 [2021-07-09 17:29:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:45,299 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 119 transitions. [2021-07-09 17:29:45,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 119 transitions. [2021-07-09 17:29:45,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:29:45,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:45,299 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:45,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:45,515 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:45,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:45,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1913206166, now seen corresponding path program 47 times [2021-07-09 17:29:45,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:45,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359683996] [2021-07-09 17:29:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:45,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:45,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359683996] [2021-07-09 17:29:45,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359683996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:45,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435649782] [2021-07-09 17:29:45,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:45,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:45,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:45,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:29:45,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:45,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:45,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:45,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:45,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:45,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:45,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:45,831 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:45,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:45,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:45,837 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-07-09 17:29:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:45,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435649782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:45,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:45,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:29:45,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367788074] [2021-07-09 17:29:45,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:45,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:45,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:45,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:45,868 INFO L87 Difference]: Start difference. First operand 62 states and 119 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:46,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:46,047 INFO L93 Difference]: Finished difference Result 102 states and 191 transitions. [2021-07-09 17:29:46,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:46,047 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:29:46,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:46,048 INFO L225 Difference]: With dead ends: 102 [2021-07-09 17:29:46,048 INFO L226 Difference]: Without dead ends: 95 [2021-07-09 17:29:46,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 283.0ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:29:46,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-07-09 17:29:46,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2021-07-09 17:29:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.967741935483871) internal successors, (122), 62 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:46,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 122 transitions. [2021-07-09 17:29:46,049 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 122 transitions. Word has length 16 [2021-07-09 17:29:46,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:46,049 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 122 transitions. [2021-07-09 17:29:46,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:46,050 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 122 transitions. [2021-07-09 17:29:46,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:29:46,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:46,050 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:46,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:46,250 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:46,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1051201102, now seen corresponding path program 48 times [2021-07-09 17:29:46,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:46,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073504792] [2021-07-09 17:29:46,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:46,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:46,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073504792] [2021-07-09 17:29:46,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073504792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:46,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641139969] [2021-07-09 17:29:46,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:46,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:29:46,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:46,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:29:46,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:46,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:46,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:46,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:29:46,637 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:46,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:46,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,643 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-07-09 17:29:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:46,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641139969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:46,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:46,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:29:46,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522442971] [2021-07-09 17:29:46,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:46,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:46,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:46,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:46,675 INFO L87 Difference]: Start difference. First operand 63 states and 122 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:46,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:46,847 INFO L93 Difference]: Finished difference Result 103 states and 194 transitions. [2021-07-09 17:29:46,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:46,847 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:29:46,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:46,848 INFO L225 Difference]: With dead ends: 103 [2021-07-09 17:29:46,848 INFO L226 Difference]: Without dead ends: 96 [2021-07-09 17:29:46,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 345.8ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:46,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-09 17:29:46,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2021-07-09 17:29:46,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 63 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 125 transitions. [2021-07-09 17:29:46,849 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 125 transitions. Word has length 16 [2021-07-09 17:29:46,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:46,850 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 125 transitions. [2021-07-09 17:29:46,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:46,850 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 125 transitions. [2021-07-09 17:29:46,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:29:46,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:46,850 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:47,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:47,050 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:47,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:47,051 INFO L82 PathProgramCache]: Analyzing trace with hash 84984170, now seen corresponding path program 49 times [2021-07-09 17:29:47,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:47,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912931656] [2021-07-09 17:29:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:47,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:47,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912931656] [2021-07-09 17:29:47,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912931656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:47,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446932224] [2021-07-09 17:29:47,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:47,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:29:47,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:47,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:47,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:47,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:47,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:47,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:47,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:29:47,417 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:47,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:47,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:47,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:47,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:47,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:47,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:47,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:47,462 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:47,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:47,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:47,480 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:29:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:47,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446932224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:47,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:47,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:29:47,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291694977] [2021-07-09 17:29:47,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:47,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:47,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:47,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:47,547 INFO L87 Difference]: Start difference. First operand 64 states and 125 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:47,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:47,860 INFO L93 Difference]: Finished difference Result 109 states and 210 transitions. [2021-07-09 17:29:47,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:29:47,860 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:29:47,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:47,861 INFO L225 Difference]: With dead ends: 109 [2021-07-09 17:29:47,861 INFO L226 Difference]: Without dead ends: 100 [2021-07-09 17:29:47,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 415.4ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:29:47,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-09 17:29:47,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 65. [2021-07-09 17:29:47,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:47,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 128 transitions. [2021-07-09 17:29:47,862 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 128 transitions. Word has length 16 [2021-07-09 17:29:47,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:47,862 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 128 transitions. [2021-07-09 17:29:47,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:47,862 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 128 transitions. [2021-07-09 17:29:47,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:29:47,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:47,863 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:48,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-07-09 17:29:48,070 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:48,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:48,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1938861990, now seen corresponding path program 50 times [2021-07-09 17:29:48,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:48,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140739058] [2021-07-09 17:29:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:48,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:48,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:48,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140739058] [2021-07-09 17:29:48,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140739058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:48,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847359079] [2021-07-09 17:29:48,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:48,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:48,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:48,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:29:48,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:48,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:48,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:48,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:48,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:29:48,383 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:48,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:48,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:48,389 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-07-09 17:29:48,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:48,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847359079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:48,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:48,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:29:48,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680979475] [2021-07-09 17:29:48,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:48,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:48,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:48,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:48,423 INFO L87 Difference]: Start difference. First operand 65 states and 128 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:48,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:48,541 INFO L93 Difference]: Finished difference Result 83 states and 159 transitions. [2021-07-09 17:29:48,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:48,542 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:29:48,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:48,542 INFO L225 Difference]: With dead ends: 83 [2021-07-09 17:29:48,542 INFO L226 Difference]: Without dead ends: 76 [2021-07-09 17:29:48,542 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:48,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-07-09 17:29:48,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2021-07-09 17:29:48,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.015151515151515) internal successors, (133), 66 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:48,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 133 transitions. [2021-07-09 17:29:48,543 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 133 transitions. Word has length 16 [2021-07-09 17:29:48,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:48,544 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 133 transitions. [2021-07-09 17:29:48,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:48,544 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 133 transitions. [2021-07-09 17:29:48,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:29:48,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:48,544 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:48,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:48,757 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:48,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:48,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1494100242, now seen corresponding path program 51 times [2021-07-09 17:29:48,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:48,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586749257] [2021-07-09 17:29:48,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:48,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:48,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586749257] [2021-07-09 17:29:48,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586749257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:48,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102057139] [2021-07-09 17:29:48,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:48,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:29:48,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:48,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:29:48,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:49,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:49,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:49,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:29:49,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:49,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,062 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 17:29:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:49,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102057139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:49,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:49,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:29:49,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269817583] [2021-07-09 17:29:49,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:49,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:49,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:49,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:49,094 INFO L87 Difference]: Start difference. First operand 67 states and 133 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:49,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:49,348 INFO L93 Difference]: Finished difference Result 93 states and 181 transitions. [2021-07-09 17:29:49,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:29:49,348 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:29:49,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:49,355 INFO L225 Difference]: With dead ends: 93 [2021-07-09 17:29:49,356 INFO L226 Difference]: Without dead ends: 86 [2021-07-09 17:29:49,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 292.6ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-07-09 17:29:49,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 68. [2021-07-09 17:29:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.029850746268657) internal successors, (136), 67 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 136 transitions. [2021-07-09 17:29:49,357 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 136 transitions. Word has length 16 [2021-07-09 17:29:49,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:49,357 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 136 transitions. [2021-07-09 17:29:49,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:49,357 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 136 transitions. [2021-07-09 17:29:49,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:29:49,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:49,358 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:49,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:49,566 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:49,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:49,567 INFO L82 PathProgramCache]: Analyzing trace with hash -357914970, now seen corresponding path program 52 times [2021-07-09 17:29:49,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:49,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291868738] [2021-07-09 17:29:49,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:49,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:49,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291868738] [2021-07-09 17:29:49,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291868738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:49,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932905883] [2021-07-09 17:29:49,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:49,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:49,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:49,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:29:49,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:49,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:49,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:49,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:29:49,926 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:49,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:49,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:49,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:49,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:29:49,977 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:49,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:49,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:49,996 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:29:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:50,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932905883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:50,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:50,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:29:50,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341455741] [2021-07-09 17:29:50,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:50,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:50,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:50,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:50,066 INFO L87 Difference]: Start difference. First operand 68 states and 136 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:50,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:50,322 INFO L93 Difference]: Finished difference Result 93 states and 183 transitions. [2021-07-09 17:29:50,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:29:50,323 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:29:50,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:50,323 INFO L225 Difference]: With dead ends: 93 [2021-07-09 17:29:50,323 INFO L226 Difference]: Without dead ends: 84 [2021-07-09 17:29:50,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 402.0ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:29:50,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-09 17:29:50,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2021-07-09 17:29:50,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0) internal successors, (130), 65 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:50,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 130 transitions. [2021-07-09 17:29:50,325 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 130 transitions. Word has length 16 [2021-07-09 17:29:50,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:50,325 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 130 transitions. [2021-07-09 17:29:50,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:50,325 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 130 transitions. [2021-07-09 17:29:50,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:29:50,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:50,325 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:50,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:50,540 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:50,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:50,541 INFO L82 PathProgramCache]: Analyzing trace with hash 694082934, now seen corresponding path program 53 times [2021-07-09 17:29:50,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:50,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633323742] [2021-07-09 17:29:50,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:50,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:50,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633323742] [2021-07-09 17:29:50,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633323742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:50,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308723013] [2021-07-09 17:29:50,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:50,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:50,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:50,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:29:50,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:50,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:50,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:50,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:50,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:50,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:50,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:50,837 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:50,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:50,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:50,843 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-07-09 17:29:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:50,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308723013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:50,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:50,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:29:50,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596618867] [2021-07-09 17:29:50,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:50,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:50,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:50,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:50,879 INFO L87 Difference]: Start difference. First operand 66 states and 130 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:51,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:51,079 INFO L93 Difference]: Finished difference Result 86 states and 169 transitions. [2021-07-09 17:29:51,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:29:51,079 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:29:51,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:51,079 INFO L225 Difference]: With dead ends: 86 [2021-07-09 17:29:51,079 INFO L226 Difference]: Without dead ends: 79 [2021-07-09 17:29:51,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 271.2ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:29:51,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-09 17:29:51,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2021-07-09 17:29:51,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 139 transitions. [2021-07-09 17:29:51,081 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 139 transitions. Word has length 16 [2021-07-09 17:29:51,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:51,081 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 139 transitions. [2021-07-09 17:29:51,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:51,081 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 139 transitions. [2021-07-09 17:29:51,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:29:51,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:51,081 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:51,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:51,289 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:51,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:51,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1830268206, now seen corresponding path program 54 times [2021-07-09 17:29:51,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:51,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926202369] [2021-07-09 17:29:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:51,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:51,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926202369] [2021-07-09 17:29:51,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926202369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:51,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116357889] [2021-07-09 17:29:51,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:51,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:29:51,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:51,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:29:51,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:51,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:51,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:51,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:51,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:51,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:51,568 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:51,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:51,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:51,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:51,591 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:51,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:51,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:51,619 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:51,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:51,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:51,637 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:29:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:51,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116357889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:51,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:51,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:29:51,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559735736] [2021-07-09 17:29:51,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:51,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:51,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:51,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:51,715 INFO L87 Difference]: Start difference. First operand 70 states and 139 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:52,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:52,071 INFO L93 Difference]: Finished difference Result 93 states and 183 transitions. [2021-07-09 17:29:52,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:29:52,072 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:29:52,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:52,072 INFO L225 Difference]: With dead ends: 93 [2021-07-09 17:29:52,072 INFO L226 Difference]: Without dead ends: 84 [2021-07-09 17:29:52,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 418.5ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:29:52,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-09 17:29:52,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2021-07-09 17:29:52,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:52,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 136 transitions. [2021-07-09 17:29:52,076 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 136 transitions. Word has length 16 [2021-07-09 17:29:52,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:52,076 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 136 transitions. [2021-07-09 17:29:52,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:52,077 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 136 transitions. [2021-07-09 17:29:52,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:29:52,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:52,077 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:52,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-07-09 17:29:52,278 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:52,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:52,278 INFO L82 PathProgramCache]: Analyzing trace with hash -315902554, now seen corresponding path program 55 times [2021-07-09 17:29:52,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:52,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530655345] [2021-07-09 17:29:52,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:52,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:52,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530655345] [2021-07-09 17:29:52,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530655345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:52,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929649633] [2021-07-09 17:29:52,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:52,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:29:52,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:52,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:52,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:52,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:52,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:52,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:52,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:52,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:52,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:52,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:52,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:52,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:29:52,554 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:52,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:52,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:29:52,557 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:52,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:52,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:52,578 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:29:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:52,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929649633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:52,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:52,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:29:52,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315236772] [2021-07-09 17:29:52,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:52,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:52,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:52,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:52,644 INFO L87 Difference]: Start difference. First operand 69 states and 136 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:52,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:52,988 INFO L93 Difference]: Finished difference Result 94 states and 188 transitions. [2021-07-09 17:29:52,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:29:52,988 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:29:52,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:52,988 INFO L225 Difference]: With dead ends: 94 [2021-07-09 17:29:52,988 INFO L226 Difference]: Without dead ends: 85 [2021-07-09 17:29:52,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 434.9ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:29:52,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-07-09 17:29:52,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2021-07-09 17:29:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 139 transitions. [2021-07-09 17:29:52,990 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 139 transitions. Word has length 16 [2021-07-09 17:29:52,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:52,990 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 139 transitions. [2021-07-09 17:29:52,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:52,990 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 139 transitions. [2021-07-09 17:29:52,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:29:52,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:52,990 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:53,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:53,205 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:53,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:53,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1093890538, now seen corresponding path program 56 times [2021-07-09 17:29:53,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:53,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969328462] [2021-07-09 17:29:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:53,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:53,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969328462] [2021-07-09 17:29:53,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969328462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:53,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778287414] [2021-07-09 17:29:53,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:53,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:53,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:53,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:29:53,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:53,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:53,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:53,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:29:53,474 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:53,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:53,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,480 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 17:29:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:53,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778287414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:53,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:53,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:29:53,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005796435] [2021-07-09 17:29:53,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:53,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:53,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:53,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:53,513 INFO L87 Difference]: Start difference. First operand 70 states and 139 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:53,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:53,647 INFO L93 Difference]: Finished difference Result 89 states and 171 transitions. [2021-07-09 17:29:53,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:53,648 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:29:53,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:53,648 INFO L225 Difference]: With dead ends: 89 [2021-07-09 17:29:53,648 INFO L226 Difference]: Without dead ends: 82 [2021-07-09 17:29:53,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:53,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-09 17:29:53,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2021-07-09 17:29:53,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:53,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-07-09 17:29:53,649 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 16 [2021-07-09 17:29:53,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:53,649 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-07-09 17:29:53,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:53,650 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-07-09 17:29:53,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:29:53,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:53,650 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:53,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:53,861 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:53,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:53,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1955895602, now seen corresponding path program 57 times [2021-07-09 17:29:53,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:53,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844448066] [2021-07-09 17:29:53,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:54,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:54,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844448066] [2021-07-09 17:29:54,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844448066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:54,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553202060] [2021-07-09 17:29:54,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:54,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:29:54,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:54,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:29:54,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:54,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:54,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:54,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:54,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:54,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:54,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:29:54,217 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:54,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:54,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:54,223 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-07-09 17:29:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:54,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553202060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:54,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:54,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:29:54,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693370428] [2021-07-09 17:29:54,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:54,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:54,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:54,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:54,267 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:54,486 INFO L93 Difference]: Finished difference Result 99 states and 193 transitions. [2021-07-09 17:29:54,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:29:54,486 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:29:54,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:54,486 INFO L225 Difference]: With dead ends: 99 [2021-07-09 17:29:54,487 INFO L226 Difference]: Without dead ends: 92 [2021-07-09 17:29:54,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 333.7ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:29:54,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-09 17:29:54,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2021-07-09 17:29:54,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 71 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 145 transitions. [2021-07-09 17:29:54,488 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 145 transitions. Word has length 16 [2021-07-09 17:29:54,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:54,488 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 145 transitions. [2021-07-09 17:29:54,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,488 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 145 transitions. [2021-07-09 17:29:54,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:29:54,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:54,488 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:54,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:54,701 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:54,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:54,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1202886422, now seen corresponding path program 58 times [2021-07-09 17:29:54,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:54,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352431728] [2021-07-09 17:29:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:54,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:54,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352431728] [2021-07-09 17:29:54,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352431728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:54,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262528598] [2021-07-09 17:29:54,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:54,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:54,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:54,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:29:54,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:55,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:55,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:55,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:55,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:55,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:55,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:55,087 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:55,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:55,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:55,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:55,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:55,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:55,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:55,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:29:55,141 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:55,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:55,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:55,160 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:29:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:55,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262528598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:55,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:55,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:29:55,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091006814] [2021-07-09 17:29:55,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:55,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:55,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:55,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:55,229 INFO L87 Difference]: Start difference. First operand 72 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:55,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:55,542 INFO L93 Difference]: Finished difference Result 100 states and 197 transitions. [2021-07-09 17:29:55,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:29:55,542 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:29:55,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:55,543 INFO L225 Difference]: With dead ends: 100 [2021-07-09 17:29:55,543 INFO L226 Difference]: Without dead ends: 91 [2021-07-09 17:29:55,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 453.5ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:55,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-09 17:29:55,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2021-07-09 17:29:55,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.014705882352941) internal successors, (137), 68 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:55,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 137 transitions. [2021-07-09 17:29:55,544 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 137 transitions. Word has length 16 [2021-07-09 17:29:55,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:55,544 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 137 transitions. [2021-07-09 17:29:55,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:55,544 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 137 transitions. [2021-07-09 17:29:55,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:29:55,545 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:55,545 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:55,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-07-09 17:29:55,751 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:55,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:55,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1036686798, now seen corresponding path program 59 times [2021-07-09 17:29:55,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:55,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838653351] [2021-07-09 17:29:55,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:55,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:55,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838653351] [2021-07-09 17:29:55,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838653351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:55,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845720043] [2021-07-09 17:29:55,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:55,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:29:55,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:55,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:29:55,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:56,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:56,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:56,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:29:56,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:56,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,042 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 17:29:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:56,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845720043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:56,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:56,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:29:56,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949799860] [2021-07-09 17:29:56,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:56,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:56,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:56,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:56,074 INFO L87 Difference]: Start difference. First operand 69 states and 137 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:56,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:56,253 INFO L93 Difference]: Finished difference Result 91 states and 179 transitions. [2021-07-09 17:29:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:29:56,254 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:29:56,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:56,254 INFO L225 Difference]: With dead ends: 91 [2021-07-09 17:29:56,254 INFO L226 Difference]: Without dead ends: 84 [2021-07-09 17:29:56,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 254.0ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:29:56,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-09 17:29:56,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2021-07-09 17:29:56,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.028169014084507) internal successors, (144), 71 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:56,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 144 transitions. [2021-07-09 17:29:56,255 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 144 transitions. Word has length 16 [2021-07-09 17:29:56,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:56,256 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 144 transitions. [2021-07-09 17:29:56,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:56,256 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 144 transitions. [2021-07-09 17:29:56,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:29:56,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:56,256 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:56,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:56,457 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:56,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:56,457 INFO L82 PathProgramCache]: Analyzing trace with hash 99498474, now seen corresponding path program 60 times [2021-07-09 17:29:56,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:56,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067597859] [2021-07-09 17:29:56,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:56,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:56,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067597859] [2021-07-09 17:29:56,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067597859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:56,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612330737] [2021-07-09 17:29:56,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:56,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:29:56,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:56,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:29:56,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:56,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:56,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:56,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:56,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:56,727 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:56,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:29:56,731 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:56,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:56,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:56,751 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:29:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:56,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612330737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:56,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:56,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:29:56,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934425895] [2021-07-09 17:29:56,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:56,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:56,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:56,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:56,839 INFO L87 Difference]: Start difference. First operand 72 states and 144 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:56,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:56,999 INFO L93 Difference]: Finished difference Result 95 states and 186 transitions. [2021-07-09 17:29:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:29:56,999 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:29:56,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:57,000 INFO L225 Difference]: With dead ends: 95 [2021-07-09 17:29:57,000 INFO L226 Difference]: Without dead ends: 88 [2021-07-09 17:29:57,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 275.6ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:29:57,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-09 17:29:57,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2021-07-09 17:29:57,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 72 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:57,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 148 transitions. [2021-07-09 17:29:57,001 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 148 transitions. Word has length 16 [2021-07-09 17:29:57,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:57,001 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 148 transitions. [2021-07-09 17:29:57,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:57,002 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 148 transitions. [2021-07-09 17:29:57,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:29:57,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:57,002 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:57,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-07-09 17:29:57,202 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:57,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:57,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2046672286, now seen corresponding path program 61 times [2021-07-09 17:29:57,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:57,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218538274] [2021-07-09 17:29:57,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:57,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:57,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218538274] [2021-07-09 17:29:57,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218538274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:57,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379930687] [2021-07-09 17:29:57,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:57,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:29:57,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:57,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:57,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:57,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:57,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:57,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:57,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:57,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:57,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:57,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:57,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:57,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:57,491 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:57,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:57,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:29:57,496 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:57,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:57,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:57,522 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:29:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:57,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379930687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:57,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:57,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:29:57,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882784236] [2021-07-09 17:29:57,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:57,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:57,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:57,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:57,608 INFO L87 Difference]: Start difference. First operand 73 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:57,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:57,937 INFO L93 Difference]: Finished difference Result 98 states and 199 transitions. [2021-07-09 17:29:57,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:29:57,937 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:29:57,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:57,938 INFO L225 Difference]: With dead ends: 98 [2021-07-09 17:29:57,938 INFO L226 Difference]: Without dead ends: 89 [2021-07-09 17:29:57,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 438.3ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:29:57,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-09 17:29:57,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 73. [2021-07-09 17:29:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 72 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:57,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 148 transitions. [2021-07-09 17:29:57,939 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 148 transitions. Word has length 16 [2021-07-09 17:29:57,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:57,939 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 148 transitions. [2021-07-09 17:29:57,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 148 transitions. [2021-07-09 17:29:57,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:29:57,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:57,939 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:58,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:58,149 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:58,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:58,149 INFO L82 PathProgramCache]: Analyzing trace with hash 141510890, now seen corresponding path program 62 times [2021-07-09 17:29:58,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:58,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442983514] [2021-07-09 17:29:58,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:58,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:58,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442983514] [2021-07-09 17:29:58,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442983514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:58,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017314000] [2021-07-09 17:29:58,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:58,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:58,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:58,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:29:58,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:58,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:58,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:58,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:58,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:58,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:58,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:58,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:58,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:58,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:58,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:58,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:29:58,416 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:58,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:58,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:29:58,419 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:29:58,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:58,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:58,440 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:29:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:58,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017314000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:58,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:58,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:29:58,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417720721] [2021-07-09 17:29:58,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:58,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:58,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:58,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:58,517 INFO L87 Difference]: Start difference. First operand 73 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:58,712 INFO L93 Difference]: Finished difference Result 103 states and 201 transitions. [2021-07-09 17:29:58,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:58,713 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:29:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:58,713 INFO L225 Difference]: With dead ends: 103 [2021-07-09 17:29:58,713 INFO L226 Difference]: Without dead ends: 89 [2021-07-09 17:29:58,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 281.5ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:29:58,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-09 17:29:58,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2021-07-09 17:29:58,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 76 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 157 transitions. [2021-07-09 17:29:58,715 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 157 transitions. Word has length 16 [2021-07-09 17:29:58,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:58,715 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 157 transitions. [2021-07-09 17:29:58,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,715 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 157 transitions. [2021-07-09 17:29:58,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:29:58,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:58,715 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:58,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:58,924 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:58,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:58,924 INFO L82 PathProgramCache]: Analyzing trace with hash 245268066, now seen corresponding path program 63 times [2021-07-09 17:29:58,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:58,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611995909] [2021-07-09 17:29:58,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:59,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:59,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611995909] [2021-07-09 17:29:59,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611995909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:59,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955404585] [2021-07-09 17:29:59,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:59,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:29:59,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:59,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:29:59,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:59,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:59,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:59,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:59,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:29:59,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:59,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:59,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:59,202 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:29:59,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:59,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955404585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:59,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:59,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:29:59,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825498081] [2021-07-09 17:29:59,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:59,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:59,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:59,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:59,234 INFO L87 Difference]: Start difference. First operand 77 states and 157 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:59,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:59,335 INFO L93 Difference]: Finished difference Result 97 states and 191 transitions. [2021-07-09 17:29:59,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:59,335 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:29:59,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:59,335 INFO L225 Difference]: With dead ends: 97 [2021-07-09 17:29:59,335 INFO L226 Difference]: Without dead ends: 90 [2021-07-09 17:29:59,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:59,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-09 17:29:59,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2021-07-09 17:29:59,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.0779220779220777) internal successors, (160), 77 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 160 transitions. [2021-07-09 17:29:59,337 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 160 transitions. Word has length 16 [2021-07-09 17:29:59,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:59,337 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 160 transitions. [2021-07-09 17:29:59,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:59,337 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 160 transitions. [2021-07-09 17:29:59,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:29:59,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:59,337 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:59,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:59,553 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:59,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1107273130, now seen corresponding path program 64 times [2021-07-09 17:29:59,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:59,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165269704] [2021-07-09 17:29:59,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:59,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:59,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165269704] [2021-07-09 17:29:59,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165269704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:59,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873167052] [2021-07-09 17:29:59,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:59,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:59,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:59,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:29:59,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:59,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:59,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:59,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:59,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:29:59,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:59,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:59,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:59,835 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:29:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:59,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873167052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:59,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:59,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:29:59,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97994760] [2021-07-09 17:29:59,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:59,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:59,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:59,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:59,865 INFO L87 Difference]: Start difference. First operand 78 states and 160 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:00,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:00,047 INFO L93 Difference]: Finished difference Result 107 states and 213 transitions. [2021-07-09 17:30:00,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:00,047 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:30:00,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:00,048 INFO L225 Difference]: With dead ends: 107 [2021-07-09 17:30:00,048 INFO L226 Difference]: Without dead ends: 100 [2021-07-09 17:30:00,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 275.0ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:00,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-09 17:30:00,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2021-07-09 17:30:00,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.08974358974359) internal successors, (163), 78 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:00,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 163 transitions. [2021-07-09 17:30:00,049 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 163 transitions. Word has length 16 [2021-07-09 17:30:00,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:00,050 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 163 transitions. [2021-07-09 17:30:00,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:00,050 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 163 transitions. [2021-07-09 17:30:00,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:30:00,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:00,050 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:00,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-07-09 17:30:00,251 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:00,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:00,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2051508894, now seen corresponding path program 65 times [2021-07-09 17:30:00,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:00,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528780933] [2021-07-09 17:30:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:00,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:00,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:00,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528780933] [2021-07-09 17:30:00,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528780933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:00,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707061717] [2021-07-09 17:30:00,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:00,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:30:00,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:00,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:30:00,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:00,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:00,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:00,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:00,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:30:00,603 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:00,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:30:00,607 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:00,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:00,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:00,627 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:30:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:00,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707061717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:00,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:00,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:30:00,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131375772] [2021-07-09 17:30:00,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:00,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:00,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:00,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:00,706 INFO L87 Difference]: Start difference. First operand 79 states and 163 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:00,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:00,942 INFO L93 Difference]: Finished difference Result 105 states and 210 transitions. [2021-07-09 17:30:00,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:00,942 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:30:00,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:00,943 INFO L225 Difference]: With dead ends: 105 [2021-07-09 17:30:00,943 INFO L226 Difference]: Without dead ends: 98 [2021-07-09 17:30:00,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 408.9ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:00,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-09 17:30:00,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2021-07-09 17:30:00,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.0779220779220777) internal successors, (160), 77 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:00,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 160 transitions. [2021-07-09 17:30:00,944 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 160 transitions. Word has length 16 [2021-07-09 17:30:00,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:00,944 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 160 transitions. [2021-07-09 17:30:00,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:00,944 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 160 transitions. [2021-07-09 17:30:00,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:30:00,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:00,945 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:01,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-07-09 17:30:01,147 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:01,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:01,147 INFO L82 PathProgramCache]: Analyzing trace with hash -999510990, now seen corresponding path program 66 times [2021-07-09 17:30:01,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:01,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054384269] [2021-07-09 17:30:01,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:01,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:01,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054384269] [2021-07-09 17:30:01,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054384269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:01,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057753061] [2021-07-09 17:30:01,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:01,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:30:01,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:01,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:30:01,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:01,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:01,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:01,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:01,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:01,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:01,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:30:01,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:01,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:01,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:01,577 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:30:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:01,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057753061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:01,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:01,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:30:01,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419610972] [2021-07-09 17:30:01,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:01,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:01,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:01,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:01,607 INFO L87 Difference]: Start difference. First operand 78 states and 160 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:01,819 INFO L93 Difference]: Finished difference Result 99 states and 200 transitions. [2021-07-09 17:30:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:01,819 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:30:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:01,819 INFO L225 Difference]: With dead ends: 99 [2021-07-09 17:30:01,819 INFO L226 Difference]: Without dead ends: 92 [2021-07-09 17:30:01,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 382.0ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:01,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-09 17:30:01,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-07-09 17:30:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:01,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 165 transitions. [2021-07-09 17:30:01,821 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 165 transitions. Word has length 16 [2021-07-09 17:30:01,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:01,821 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 165 transitions. [2021-07-09 17:30:01,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:01,821 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 165 transitions. [2021-07-09 17:30:01,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:30:01,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:01,821 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:02,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-07-09 17:30:02,022 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:02,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:02,022 INFO L82 PathProgramCache]: Analyzing trace with hash 136674282, now seen corresponding path program 67 times [2021-07-09 17:30:02,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:02,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710217870] [2021-07-09 17:30:02,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:02,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:02,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710217870] [2021-07-09 17:30:02,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710217870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:02,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544565338] [2021-07-09 17:30:02,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:02,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:30:02,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:02,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:02,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:02,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:02,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:02,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:02,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:02,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:02,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:02,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:02,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:02,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:30:02,298 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:02,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:02,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:30:02,301 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:02,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:02,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:02,321 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:30:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:02,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544565338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:02,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:02,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:30:02,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429726990] [2021-07-09 17:30:02,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:02,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:02,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:02,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:02,393 INFO L87 Difference]: Start difference. First operand 80 states and 165 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:02,688 INFO L93 Difference]: Finished difference Result 105 states and 212 transitions. [2021-07-09 17:30:02,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:02,688 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:30:02,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:02,689 INFO L225 Difference]: With dead ends: 105 [2021-07-09 17:30:02,689 INFO L226 Difference]: Without dead ends: 96 [2021-07-09 17:30:02,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 395.3ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:30:02,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-09 17:30:02,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 79. [2021-07-09 17:30:02,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.076923076923077) internal successors, (162), 78 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 162 transitions. [2021-07-09 17:30:02,690 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 162 transitions. Word has length 16 [2021-07-09 17:30:02,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:02,690 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 162 transitions. [2021-07-09 17:30:02,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,691 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 162 transitions. [2021-07-09 17:30:02,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:30:02,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:02,691 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:02,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:02,907 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:02,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:02,907 INFO L82 PathProgramCache]: Analyzing trace with hash -2009496478, now seen corresponding path program 68 times [2021-07-09 17:30:02,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:02,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165272660] [2021-07-09 17:30:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:03,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:03,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165272660] [2021-07-09 17:30:03,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165272660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:03,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978562342] [2021-07-09 17:30:03,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:03,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:03,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:03,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:30:03,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:03,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:03,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:03,110 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:03,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:30:03,140 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:03,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:30:03,144 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:03,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:03,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:03,166 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:30:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:03,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978562342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:03,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:03,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:30:03,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189643959] [2021-07-09 17:30:03,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:03,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:03,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:03,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:03,243 INFO L87 Difference]: Start difference. First operand 79 states and 162 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:03,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:03,729 INFO L93 Difference]: Finished difference Result 148 states and 284 transitions. [2021-07-09 17:30:03,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:30:03,730 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:30:03,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:03,730 INFO L225 Difference]: With dead ends: 148 [2021-07-09 17:30:03,730 INFO L226 Difference]: Without dead ends: 125 [2021-07-09 17:30:03,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 498.0ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:30:03,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-07-09 17:30:03,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 83. [2021-07-09 17:30:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1463414634146343) internal successors, (176), 82 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:03,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 176 transitions. [2021-07-09 17:30:03,732 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 176 transitions. Word has length 16 [2021-07-09 17:30:03,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:03,732 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 176 transitions. [2021-07-09 17:30:03,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 176 transitions. [2021-07-09 17:30:03,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:30:03,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:03,733 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:03,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-07-09 17:30:03,933 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:03,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:03,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1885309270, now seen corresponding path program 69 times [2021-07-09 17:30:03,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:03,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245162525] [2021-07-09 17:30:03,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:04,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:04,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245162525] [2021-07-09 17:30:04,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245162525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:04,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218491254] [2021-07-09 17:30:04,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:04,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:04,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:04,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:30:04,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:04,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:04,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:04,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:04,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:04,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:04,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:04,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:04,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:04,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:04,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:04,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:30:04,206 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:04,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:04,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:30:04,209 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:04,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:04,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:04,242 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-07-09 17:30:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:04,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218491254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:04,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:04,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:30:04,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097684872] [2021-07-09 17:30:04,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:04,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:04,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:04,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:04,295 INFO L87 Difference]: Start difference. First operand 83 states and 176 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:04,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:04,601 INFO L93 Difference]: Finished difference Result 105 states and 215 transitions. [2021-07-09 17:30:04,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:04,601 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:30:04,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:04,602 INFO L225 Difference]: With dead ends: 105 [2021-07-09 17:30:04,602 INFO L226 Difference]: Without dead ends: 92 [2021-07-09 17:30:04,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 335.8ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:04,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-09 17:30:04,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2021-07-09 17:30:04,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:04,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-07-09 17:30:04,603 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-07-09 17:30:04,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:04,603 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-07-09 17:30:04,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:04,603 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-07-09 17:30:04,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:30:04,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:04,604 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:04,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-07-09 17:30:04,817 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:04,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:04,817 INFO L82 PathProgramCache]: Analyzing trace with hash -749123998, now seen corresponding path program 70 times [2021-07-09 17:30:04,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:04,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369365881] [2021-07-09 17:30:04,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:05,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:05,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369365881] [2021-07-09 17:30:05,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369365881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:05,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793487948] [2021-07-09 17:30:05,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:05,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:05,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:05,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:30:05,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:05,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:05,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:05,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:05,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:05,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:05,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:05,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:05,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:05,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:05,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:05,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:30:05,155 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:05,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:05,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:30:05,158 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:05,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:05,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:05,179 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:30:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:05,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793487948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:05,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:05,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:30:05,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762546853] [2021-07-09 17:30:05,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:05,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:05,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:05,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:05,260 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:05,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:05,575 INFO L93 Difference]: Finished difference Result 105 states and 219 transitions. [2021-07-09 17:30:05,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:05,575 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:30:05,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:05,576 INFO L225 Difference]: With dead ends: 105 [2021-07-09 17:30:05,576 INFO L226 Difference]: Without dead ends: 96 [2021-07-09 17:30:05,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 441.0ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:05,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-09 17:30:05,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2021-07-09 17:30:05,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:05,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-07-09 17:30:05,577 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-07-09 17:30:05,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:05,577 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-07-09 17:30:05,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:05,578 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-07-09 17:30:05,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:30:05,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:05,578 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:05,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable352 [2021-07-09 17:30:05,794 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:05,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:05,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1399672538, now seen corresponding path program 71 times [2021-07-09 17:30:05,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:05,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581844774] [2021-07-09 17:30:05,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:05,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:06,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:06,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581844774] [2021-07-09 17:30:06,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581844774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:06,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896888942] [2021-07-09 17:30:06,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:06,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:30:06,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:06,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:30:06,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:06,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:06,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:06,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:06,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:06,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:06,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:06,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:06,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:06,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:30:06,125 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:06,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:06,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:30:06,128 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:06,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:06,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:06,156 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:30:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:06,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896888942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:06,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:06,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:30:06,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296356331] [2021-07-09 17:30:06,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:06,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:06,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:06,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:06,221 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:06,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:06,546 INFO L93 Difference]: Finished difference Result 112 states and 235 transitions. [2021-07-09 17:30:06,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:06,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:30:06,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:06,547 INFO L225 Difference]: With dead ends: 112 [2021-07-09 17:30:06,547 INFO L226 Difference]: Without dead ends: 103 [2021-07-09 17:30:06,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 454.8ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:30:06,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-09 17:30:06,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 86. [2021-07-09 17:30:06,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-07-09 17:30:06,548 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-07-09 17:30:06,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:06,548 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-07-09 17:30:06,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:06,548 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-07-09 17:30:06,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:30:06,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:06,549 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:06,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-07-09 17:30:06,765 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:06,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:06,765 INFO L82 PathProgramCache]: Analyzing trace with hash -707111582, now seen corresponding path program 72 times [2021-07-09 17:30:06,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:06,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638006095] [2021-07-09 17:30:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:06,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:06,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638006095] [2021-07-09 17:30:06,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638006095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:06,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814303735] [2021-07-09 17:30:06,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:06,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:30:06,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:06,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:30:06,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:07,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:07,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:07,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:07,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:07,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:07,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:30:07,124 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:07,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:07,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:07,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:07,147 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:07,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:07,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:07,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:30:07,168 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:07,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:07,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:07,187 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:30:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:07,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814303735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:07,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:07,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:30:07,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231455665] [2021-07-09 17:30:07,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:07,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:07,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:07,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:07,278 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:07,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:07,485 INFO L93 Difference]: Finished difference Result 117 states and 237 transitions. [2021-07-09 17:30:07,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:07,485 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:30:07,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:07,486 INFO L225 Difference]: With dead ends: 117 [2021-07-09 17:30:07,486 INFO L226 Difference]: Without dead ends: 103 [2021-07-09 17:30:07,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 316.3ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:07,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-09 17:30:07,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 86. [2021-07-09 17:30:07,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-07-09 17:30:07,488 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-07-09 17:30:07,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:07,488 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-07-09 17:30:07,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:07,488 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-07-09 17:30:07,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:30:07,489 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:07,489 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:07,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-07-09 17:30:07,689 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:07,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:07,690 INFO L82 PathProgramCache]: Analyzing trace with hash -125256330, now seen corresponding path program 73 times [2021-07-09 17:30:07,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:07,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761129685] [2021-07-09 17:30:07,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:07,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:07,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761129685] [2021-07-09 17:30:07,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761129685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:07,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873034228] [2021-07-09 17:30:07,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:07,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:30:07,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:07,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:07,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:07,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:07,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:07,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:07,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:30:07,909 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:07,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:07,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:07,916 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:30:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:07,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873034228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:07,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:07,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:30:07,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242970203] [2021-07-09 17:30:07,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:07,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:07,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:07,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:07,946 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:08,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:08,209 INFO L93 Difference]: Finished difference Result 110 states and 228 transitions. [2021-07-09 17:30:08,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:08,209 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:30:08,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:08,209 INFO L225 Difference]: With dead ends: 110 [2021-07-09 17:30:08,209 INFO L226 Difference]: Without dead ends: 103 [2021-07-09 17:30:08,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:08,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-09 17:30:08,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 87. [2021-07-09 17:30:08,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 86 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:08,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 185 transitions. [2021-07-09 17:30:08,211 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 185 transitions. Word has length 16 [2021-07-09 17:30:08,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:08,211 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 185 transitions. [2021-07-09 17:30:08,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:08,211 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 185 transitions. [2021-07-09 17:30:08,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:30:08,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:08,211 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:08,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:08,412 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:08,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:08,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1010928942, now seen corresponding path program 74 times [2021-07-09 17:30:08,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:08,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659382621] [2021-07-09 17:30:08,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:08,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:08,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659382621] [2021-07-09 17:30:08,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659382621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:08,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130217507] [2021-07-09 17:30:08,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:08,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:08,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:08,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:30:08,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:08,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:08,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:08,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:08,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:08,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:08,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:08,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:08,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:08,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:08,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:08,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:30:08,666 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:08,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:08,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:30:08,670 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:08,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:08,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:08,689 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:30:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:08,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130217507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:08,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:08,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:30:08,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919232160] [2021-07-09 17:30:08,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:08,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:08,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:08,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:08,775 INFO L87 Difference]: Start difference. First operand 87 states and 185 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:09,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:09,054 INFO L93 Difference]: Finished difference Result 113 states and 233 transitions. [2021-07-09 17:30:09,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:09,055 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:30:09,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:09,055 INFO L225 Difference]: With dead ends: 113 [2021-07-09 17:30:09,055 INFO L226 Difference]: Without dead ends: 106 [2021-07-09 17:30:09,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 345.9ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:09,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-09 17:30:09,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 86. [2021-07-09 17:30:09,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:09,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-07-09 17:30:09,057 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-07-09 17:30:09,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:09,057 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-07-09 17:30:09,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:09,057 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-07-09 17:30:09,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:30:09,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:09,057 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:09,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-07-09 17:30:09,268 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:09,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:09,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1135241818, now seen corresponding path program 75 times [2021-07-09 17:30:09,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:09,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176400711] [2021-07-09 17:30:09,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:09,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:09,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176400711] [2021-07-09 17:30:09,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176400711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:09,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433029642] [2021-07-09 17:30:09,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:09,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:09,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:09,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:30:09,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:09,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:09,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:09,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:09,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:09,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:09,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:09,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:09,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:09,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:09,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:30:09,538 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:09,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:09,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:09,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:30:09,561 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:09,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:09,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:09,580 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:30:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:09,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433029642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:09,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:09,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:30:09,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173076770] [2021-07-09 17:30:09,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:09,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:09,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:09,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:09,657 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:09,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:09,897 INFO L93 Difference]: Finished difference Result 126 states and 253 transitions. [2021-07-09 17:30:09,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:09,898 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:30:09,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:09,898 INFO L225 Difference]: With dead ends: 126 [2021-07-09 17:30:09,898 INFO L226 Difference]: Without dead ends: 112 [2021-07-09 17:30:09,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:09,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-09 17:30:09,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 86. [2021-07-09 17:30:09,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:09,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-07-09 17:30:09,900 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-07-09 17:30:09,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:09,900 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-07-09 17:30:09,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:09,900 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-07-09 17:30:09,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:30:09,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:09,900 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:10,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:10,121 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:10,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:10,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1052941358, now seen corresponding path program 76 times [2021-07-09 17:30:10,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:10,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780465435] [2021-07-09 17:30:10,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:10,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:10,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780465435] [2021-07-09 17:30:10,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780465435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:10,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425297684] [2021-07-09 17:30:10,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:10,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:10,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:10,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:30:10,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:10,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:10,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:10,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:10,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:30:10,385 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:10,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:30:10,389 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:10,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:10,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:10,409 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:30:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:10,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425297684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:10,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:10,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:30:10,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827184044] [2021-07-09 17:30:10,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:10,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:10,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:10,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:10,477 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:11,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:11,022 INFO L93 Difference]: Finished difference Result 181 states and 350 transitions. [2021-07-09 17:30:11,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:30:11,023 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:30:11,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:11,023 INFO L225 Difference]: With dead ends: 181 [2021-07-09 17:30:11,023 INFO L226 Difference]: Without dead ends: 151 [2021-07-09 17:30:11,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 554.6ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:11,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-09 17:30:11,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 90. [2021-07-09 17:30:11,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.191011235955056) internal successors, (195), 89 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:11,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 195 transitions. [2021-07-09 17:30:11,025 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 195 transitions. Word has length 16 [2021-07-09 17:30:11,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:11,025 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 195 transitions. [2021-07-09 17:30:11,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:11,025 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 195 transitions. [2021-07-09 17:30:11,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:30:11,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:11,025 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:11,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-07-09 17:30:11,226 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:11,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:11,226 INFO L82 PathProgramCache]: Analyzing trace with hash -275756062, now seen corresponding path program 77 times [2021-07-09 17:30:11,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:11,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421940253] [2021-07-09 17:30:11,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:11,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:11,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421940253] [2021-07-09 17:30:11,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421940253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:11,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936772813] [2021-07-09 17:30:11,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:11,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:30:11,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:11,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:30:11,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:11,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:11,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:11,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:11,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:11,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:11,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:11,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:11,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:11,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:11,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:11,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:30:11,543 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:11,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:11,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:30:11,547 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:11,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:11,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:11,567 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:30:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:11,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936772813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:11,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:11,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:30:11,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429704979] [2021-07-09 17:30:11,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:11,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:11,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:11,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:11,655 INFO L87 Difference]: Start difference. First operand 90 states and 195 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:12,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:12,073 INFO L93 Difference]: Finished difference Result 144 states and 298 transitions. [2021-07-09 17:30:12,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:12,074 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:30:12,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:12,074 INFO L225 Difference]: With dead ends: 144 [2021-07-09 17:30:12,074 INFO L226 Difference]: Without dead ends: 135 [2021-07-09 17:30:12,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 491.8ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:30:12,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-09 17:30:12,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 94. [2021-07-09 17:30:12,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:12,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-07-09 17:30:12,076 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 16 [2021-07-09 17:30:12,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:12,076 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-07-09 17:30:12,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:12,076 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-07-09 17:30:12,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:12,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:12,077 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:12,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2021-07-09 17:30:12,293 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:12,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:12,293 INFO L82 PathProgramCache]: Analyzing trace with hash 966701318, now seen corresponding path program 78 times [2021-07-09 17:30:12,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:12,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741926953] [2021-07-09 17:30:12,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:12,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:12,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741926953] [2021-07-09 17:30:12,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741926953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:12,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288599268] [2021-07-09 17:30:12,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:12,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:30:12,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:12,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:30:12,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:12,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288599268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:12,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:12,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:12,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707868509] [2021-07-09 17:30:12,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:12,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:12,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:12,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:12,515 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:12,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:12,696 INFO L93 Difference]: Finished difference Result 128 states and 259 transitions. [2021-07-09 17:30:12,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:12,696 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:12,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:12,697 INFO L225 Difference]: With dead ends: 128 [2021-07-09 17:30:12,697 INFO L226 Difference]: Without dead ends: 114 [2021-07-09 17:30:12,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 236.2ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:12,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-07-09 17:30:12,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 89. [2021-07-09 17:30:12,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.2045454545454546) internal successors, (194), 88 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:12,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 194 transitions. [2021-07-09 17:30:12,698 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 194 transitions. Word has length 17 [2021-07-09 17:30:12,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:12,698 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 194 transitions. [2021-07-09 17:30:12,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 194 transitions. [2021-07-09 17:30:12,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:12,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:12,699 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:12,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:12,925 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:12,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:12,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1397953814, now seen corresponding path program 79 times [2021-07-09 17:30:12,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:12,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356009992] [2021-07-09 17:30:12,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:12,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:12,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356009992] [2021-07-09 17:30:12,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356009992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:12,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65702080] [2021-07-09 17:30:12,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:13,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:13,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:13,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65702080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:13,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:13,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:30:13,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980497528] [2021-07-09 17:30:13,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:30:13,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:13,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:30:13,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:30:13,077 INFO L87 Difference]: Start difference. First operand 89 states and 194 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:13,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:13,150 INFO L93 Difference]: Finished difference Result 126 states and 261 transitions. [2021-07-09 17:30:13,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:13,151 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:13,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:13,151 INFO L225 Difference]: With dead ends: 126 [2021-07-09 17:30:13,151 INFO L226 Difference]: Without dead ends: 126 [2021-07-09 17:30:13,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:30:13,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-09 17:30:13,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 90. [2021-07-09 17:30:13,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.2134831460674156) internal successors, (197), 89 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:13,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 197 transitions. [2021-07-09 17:30:13,153 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 197 transitions. Word has length 17 [2021-07-09 17:30:13,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:13,153 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 197 transitions. [2021-07-09 17:30:13,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:13,153 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 197 transitions. [2021-07-09 17:30:13,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:13,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:13,153 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:13,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-07-09 17:30:13,363 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:13,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:13,364 INFO L82 PathProgramCache]: Analyzing trace with hash 846772626, now seen corresponding path program 80 times [2021-07-09 17:30:13,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:13,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146951347] [2021-07-09 17:30:13,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:13,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:13,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146951347] [2021-07-09 17:30:13,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146951347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:13,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381447981] [2021-07-09 17:30:13,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:13,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:13,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:13,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:13,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:13,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381447981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:13,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:13,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:13,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510795233] [2021-07-09 17:30:13,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:13,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:13,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:13,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:13,661 INFO L87 Difference]: Start difference. First operand 90 states and 197 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:14,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:14,034 INFO L93 Difference]: Finished difference Result 128 states and 260 transitions. [2021-07-09 17:30:14,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:14,034 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:14,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:14,035 INFO L225 Difference]: With dead ends: 128 [2021-07-09 17:30:14,035 INFO L226 Difference]: Without dead ends: 119 [2021-07-09 17:30:14,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 422.9ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:14,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-09 17:30:14,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 91. [2021-07-09 17:30:14,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.2111111111111112) internal successors, (199), 90 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:14,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 199 transitions. [2021-07-09 17:30:14,037 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 199 transitions. Word has length 17 [2021-07-09 17:30:14,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:14,037 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 199 transitions. [2021-07-09 17:30:14,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:14,037 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 199 transitions. [2021-07-09 17:30:14,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:14,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:14,045 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:14,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:14,261 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:14,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:14,262 INFO L82 PathProgramCache]: Analyzing trace with hash 396996678, now seen corresponding path program 81 times [2021-07-09 17:30:14,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:14,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111799010] [2021-07-09 17:30:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:14,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:14,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111799010] [2021-07-09 17:30:14,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111799010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:14,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346097108] [2021-07-09 17:30:14,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:14,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:14,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:14,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:14,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:14,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346097108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:14,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:14,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:14,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956333732] [2021-07-09 17:30:14,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:14,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:14,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:14,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:14,469 INFO L87 Difference]: Start difference. First operand 91 states and 199 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:14,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:14,653 INFO L93 Difference]: Finished difference Result 143 states and 295 transitions. [2021-07-09 17:30:14,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:14,653 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:14,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:14,654 INFO L225 Difference]: With dead ends: 143 [2021-07-09 17:30:14,654 INFO L226 Difference]: Without dead ends: 143 [2021-07-09 17:30:14,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:14,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-09 17:30:14,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 91. [2021-07-09 17:30:14,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.2111111111111112) internal successors, (199), 90 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:14,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 199 transitions. [2021-07-09 17:30:14,656 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 199 transitions. Word has length 17 [2021-07-09 17:30:14,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:14,656 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 199 transitions. [2021-07-09 17:30:14,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:14,656 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 199 transitions. [2021-07-09 17:30:14,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:14,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:14,656 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:14,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-07-09 17:30:14,872 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:14,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:14,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1799125834, now seen corresponding path program 82 times [2021-07-09 17:30:14,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:14,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444350383] [2021-07-09 17:30:14,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:14,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:14,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444350383] [2021-07-09 17:30:14,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444350383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:14,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080041564] [2021-07-09 17:30:14,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:14,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:14,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:14,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:14,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:15,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080041564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:15,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:15,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:15,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341191834] [2021-07-09 17:30:15,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:15,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:15,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:15,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:15,154 INFO L87 Difference]: Start difference. First operand 91 states and 199 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:15,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:15,572 INFO L93 Difference]: Finished difference Result 126 states and 257 transitions. [2021-07-09 17:30:15,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:15,572 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:15,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:15,573 INFO L225 Difference]: With dead ends: 126 [2021-07-09 17:30:15,573 INFO L226 Difference]: Without dead ends: 120 [2021-07-09 17:30:15,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 466.4ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-09 17:30:15,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 91. [2021-07-09 17:30:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.2111111111111112) internal successors, (199), 90 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:15,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 199 transitions. [2021-07-09 17:30:15,574 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 199 transitions. Word has length 17 [2021-07-09 17:30:15,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:15,574 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 199 transitions. [2021-07-09 17:30:15,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:15,574 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 199 transitions. [2021-07-09 17:30:15,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:15,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:15,575 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:15,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-07-09 17:30:15,791 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:15,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:15,792 INFO L82 PathProgramCache]: Analyzing trace with hash -847782378, now seen corresponding path program 83 times [2021-07-09 17:30:15,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:15,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005748125] [2021-07-09 17:30:15,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:15,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:15,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005748125] [2021-07-09 17:30:15,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005748125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:15,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292074333] [2021-07-09 17:30:15,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:15,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:30:15,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:15,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:15,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:16,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292074333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:16,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:16,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:16,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384033341] [2021-07-09 17:30:16,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:16,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:16,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:16,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:16,045 INFO L87 Difference]: Start difference. First operand 91 states and 199 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:16,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:16,227 INFO L93 Difference]: Finished difference Result 140 states and 289 transitions. [2021-07-09 17:30:16,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:16,227 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:16,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:16,228 INFO L225 Difference]: With dead ends: 140 [2021-07-09 17:30:16,228 INFO L226 Difference]: Without dead ends: 140 [2021-07-09 17:30:16,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:16,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-07-09 17:30:16,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 92. [2021-07-09 17:30:16,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.208791208791209) internal successors, (201), 91 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 201 transitions. [2021-07-09 17:30:16,229 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 201 transitions. Word has length 17 [2021-07-09 17:30:16,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:16,229 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 201 transitions. [2021-07-09 17:30:16,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:16,229 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 201 transitions. [2021-07-09 17:30:16,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:16,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:16,230 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:16,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:16,430 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:16,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:16,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1633836398, now seen corresponding path program 84 times [2021-07-09 17:30:16,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:16,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063012540] [2021-07-09 17:30:16,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:16,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:16,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063012540] [2021-07-09 17:30:16,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063012540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:16,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399281269] [2021-07-09 17:30:16,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:16,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:30:16,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:16,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:16,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:16,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:16,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:16,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:16,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:16,769 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:30:16,769 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:16,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:30:16,772 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:16,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:16,787 INFO L518 ElimStorePlain]: Eliminatee v_prenex_77 vanished before elimination [2021-07-09 17:30:16,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:16,789 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:30:16,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:16,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399281269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:16,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:16,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:16,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245244666] [2021-07-09 17:30:16,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:16,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:16,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:16,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:16,827 INFO L87 Difference]: Start difference. First operand 92 states and 201 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:17,371 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-07-09 17:30:17,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:17,494 INFO L93 Difference]: Finished difference Result 139 states and 278 transitions. [2021-07-09 17:30:17,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:17,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:17,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:17,495 INFO L225 Difference]: With dead ends: 139 [2021-07-09 17:30:17,495 INFO L226 Difference]: Without dead ends: 136 [2021-07-09 17:30:17,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 702.0ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:17,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-09 17:30:17,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 97. [2021-07-09 17:30:17,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.2083333333333335) internal successors, (212), 96 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:17,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 212 transitions. [2021-07-09 17:30:17,497 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 212 transitions. Word has length 17 [2021-07-09 17:30:17,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:17,497 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 212 transitions. [2021-07-09 17:30:17,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:17,497 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 212 transitions. [2021-07-09 17:30:17,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:17,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:17,497 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:17,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-07-09 17:30:17,705 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:17,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:17,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1857767866, now seen corresponding path program 85 times [2021-07-09 17:30:17,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:17,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990939397] [2021-07-09 17:30:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:17,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:17,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990939397] [2021-07-09 17:30:17,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990939397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:17,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888728784] [2021-07-09 17:30:17,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:17,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:17,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:17,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888728784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:17,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:17,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:17,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102730570] [2021-07-09 17:30:17,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:17,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:17,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:17,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:17,958 INFO L87 Difference]: Start difference. First operand 97 states and 212 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:18,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:18,192 INFO L93 Difference]: Finished difference Result 141 states and 292 transitions. [2021-07-09 17:30:18,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:18,192 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:18,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:18,192 INFO L225 Difference]: With dead ends: 141 [2021-07-09 17:30:18,192 INFO L226 Difference]: Without dead ends: 141 [2021-07-09 17:30:18,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 242.4ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:18,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-09 17:30:18,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 97. [2021-07-09 17:30:18,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.2083333333333335) internal successors, (212), 96 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:18,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 212 transitions. [2021-07-09 17:30:18,194 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 212 transitions. Word has length 17 [2021-07-09 17:30:18,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:18,194 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 212 transitions. [2021-07-09 17:30:18,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:18,194 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 212 transitions. [2021-07-09 17:30:18,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:18,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:18,195 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:18,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-07-09 17:30:18,413 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:18,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:18,413 INFO L82 PathProgramCache]: Analyzing trace with hash -497651126, now seen corresponding path program 86 times [2021-07-09 17:30:18,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:18,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979092416] [2021-07-09 17:30:18,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:18,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:18,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979092416] [2021-07-09 17:30:18,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979092416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:18,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093027299] [2021-07-09 17:30:18,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:18,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:18,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:18,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:18,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:18,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:18,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:18,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:18,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:18,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:18,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:18,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:18,712 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:30:18,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:30:18,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:18,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:18,726 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:18,726 INFO L518 ElimStorePlain]: Eliminatee v_prenex_80 vanished before elimination [2021-07-09 17:30:18,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:18,727 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:30:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:18,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093027299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:18,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:18,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:18,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391515561] [2021-07-09 17:30:18,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:18,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:18,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:18,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:18,756 INFO L87 Difference]: Start difference. First operand 97 states and 212 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:19,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:19,166 INFO L93 Difference]: Finished difference Result 124 states and 257 transitions. [2021-07-09 17:30:19,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:19,166 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:19,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:19,167 INFO L225 Difference]: With dead ends: 124 [2021-07-09 17:30:19,167 INFO L226 Difference]: Without dead ends: 124 [2021-07-09 17:30:19,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 454.4ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:19,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-07-09 17:30:19,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2021-07-09 17:30:19,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.2065217391304346) internal successors, (203), 92 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:19,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 203 transitions. [2021-07-09 17:30:19,169 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 203 transitions. Word has length 17 [2021-07-09 17:30:19,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:19,169 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 203 transitions. [2021-07-09 17:30:19,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 203 transitions. [2021-07-09 17:30:19,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:19,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:19,169 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:19,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-07-09 17:30:19,370 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:19,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:19,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1801174, now seen corresponding path program 87 times [2021-07-09 17:30:19,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:19,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170502098] [2021-07-09 17:30:19,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:19,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:19,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170502098] [2021-07-09 17:30:19,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170502098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:19,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159887053] [2021-07-09 17:30:19,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:19,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:19,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:19,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:19,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:19,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159887053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:19,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:19,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:19,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637308211] [2021-07-09 17:30:19,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:19,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:19,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:19,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:19,582 INFO L87 Difference]: Start difference. First operand 93 states and 203 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:19,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:19,791 INFO L93 Difference]: Finished difference Result 109 states and 229 transitions. [2021-07-09 17:30:19,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:19,791 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:19,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:19,791 INFO L225 Difference]: With dead ends: 109 [2021-07-09 17:30:19,791 INFO L226 Difference]: Without dead ends: 100 [2021-07-09 17:30:19,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:19,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-09 17:30:19,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2021-07-09 17:30:19,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.202127659574468) internal successors, (207), 94 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:19,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 207 transitions. [2021-07-09 17:30:19,796 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 207 transitions. Word has length 17 [2021-07-09 17:30:19,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:19,797 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 207 transitions. [2021-07-09 17:30:19,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:19,797 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 207 transitions. [2021-07-09 17:30:19,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:19,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:19,797 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:20,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-07-09 17:30:20,002 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:20,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:20,003 INFO L82 PathProgramCache]: Analyzing trace with hash -447974774, now seen corresponding path program 88 times [2021-07-09 17:30:20,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:20,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616536255] [2021-07-09 17:30:20,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:20,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:20,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616536255] [2021-07-09 17:30:20,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616536255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:20,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101790207] [2021-07-09 17:30:20,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:20,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:20,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:20,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:20,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:20,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101790207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:20,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:20,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:20,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681603069] [2021-07-09 17:30:20,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:20,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:20,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:20,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:20,202 INFO L87 Difference]: Start difference. First operand 95 states and 207 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:20,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:20,273 INFO L93 Difference]: Finished difference Result 112 states and 240 transitions. [2021-07-09 17:30:20,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:20,274 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:20,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:20,274 INFO L225 Difference]: With dead ends: 112 [2021-07-09 17:30:20,274 INFO L226 Difference]: Without dead ends: 112 [2021-07-09 17:30:20,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:20,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-09 17:30:20,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 95. [2021-07-09 17:30:20,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.202127659574468) internal successors, (207), 94 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:20,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 207 transitions. [2021-07-09 17:30:20,276 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 207 transitions. Word has length 17 [2021-07-09 17:30:20,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:20,276 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 207 transitions. [2021-07-09 17:30:20,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:20,276 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 207 transitions. [2021-07-09 17:30:20,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:20,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:20,276 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:20,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-07-09 17:30:20,485 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:20,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:20,485 INFO L82 PathProgramCache]: Analyzing trace with hash 954154382, now seen corresponding path program 89 times [2021-07-09 17:30:20,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:20,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513503986] [2021-07-09 17:30:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:20,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:20,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513503986] [2021-07-09 17:30:20,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513503986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:20,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019954615] [2021-07-09 17:30:20,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:20,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:20,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:20,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:20,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:20,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019954615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:20,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:20,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:20,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264875965] [2021-07-09 17:30:20,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:20,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:20,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:20,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:20,716 INFO L87 Difference]: Start difference. First operand 95 states and 207 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:20,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:20,967 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2021-07-09 17:30:20,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:20,967 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:20,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:20,967 INFO L225 Difference]: With dead ends: 107 [2021-07-09 17:30:20,967 INFO L226 Difference]: Without dead ends: 101 [2021-07-09 17:30:20,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 270.5ms TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:20,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-07-09 17:30:20,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2021-07-09 17:30:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.202127659574468) internal successors, (207), 94 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 207 transitions. [2021-07-09 17:30:20,970 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 207 transitions. Word has length 17 [2021-07-09 17:30:20,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:20,970 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 207 transitions. [2021-07-09 17:30:20,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:20,970 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 207 transitions. [2021-07-09 17:30:20,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:20,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:20,970 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:21,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:21,179 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:21,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:21,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1692753830, now seen corresponding path program 90 times [2021-07-09 17:30:21,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:21,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272750836] [2021-07-09 17:30:21,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:21,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:21,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272750836] [2021-07-09 17:30:21,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272750836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:21,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833090646] [2021-07-09 17:30:21,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:21,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:30:21,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:21,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:21,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:21,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833090646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:21,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:21,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:21,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279259685] [2021-07-09 17:30:21,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:21,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:21,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:21,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:21,367 INFO L87 Difference]: Start difference. First operand 95 states and 207 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:21,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:21,458 INFO L93 Difference]: Finished difference Result 125 states and 266 transitions. [2021-07-09 17:30:21,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:21,458 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:21,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:21,459 INFO L225 Difference]: With dead ends: 125 [2021-07-09 17:30:21,459 INFO L226 Difference]: Without dead ends: 125 [2021-07-09 17:30:21,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:21,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-07-09 17:30:21,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 96. [2021-07-09 17:30:21,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.2) internal successors, (209), 95 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:21,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 209 transitions. [2021-07-09 17:30:21,462 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 209 transitions. Word has length 17 [2021-07-09 17:30:21,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:21,462 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 209 transitions. [2021-07-09 17:30:21,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:21,462 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 209 transitions. [2021-07-09 17:30:21,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:21,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:21,462 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:21,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-07-09 17:30:21,677 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:21,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:21,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1816159446, now seen corresponding path program 91 times [2021-07-09 17:30:21,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:21,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109804618] [2021-07-09 17:30:21,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:21,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:21,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109804618] [2021-07-09 17:30:21,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109804618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:21,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623518567] [2021-07-09 17:30:21,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:21,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:21,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:21,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:21,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:21,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:21,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:21,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:21,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:21,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:21,949 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:30:21,949 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:21,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:30:21,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:21,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:21,967 INFO L518 ElimStorePlain]: Eliminatee v_prenex_85 vanished before elimination [2021-07-09 17:30:21,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:21,968 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:30:21,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:21,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623518567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:21,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:21,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:21,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054137118] [2021-07-09 17:30:21,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:21,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:21,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:21,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:21,999 INFO L87 Difference]: Start difference. First operand 96 states and 209 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:22,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:22,404 INFO L93 Difference]: Finished difference Result 120 states and 247 transitions. [2021-07-09 17:30:22,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:22,404 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:22,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:22,405 INFO L225 Difference]: With dead ends: 120 [2021-07-09 17:30:22,405 INFO L226 Difference]: Without dead ends: 117 [2021-07-09 17:30:22,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 395.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:22,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-07-09 17:30:22,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 101. [2021-07-09 17:30:22,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.2) internal successors, (220), 100 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 220 transitions. [2021-07-09 17:30:22,406 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 220 transitions. Word has length 17 [2021-07-09 17:30:22,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:22,406 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 220 transitions. [2021-07-09 17:30:22,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:22,406 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 220 transitions. [2021-07-09 17:30:22,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:22,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:22,407 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:22,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-07-09 17:30:22,613 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:22,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:22,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1592227978, now seen corresponding path program 92 times [2021-07-09 17:30:22,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:22,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601654619] [2021-07-09 17:30:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:22,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:22,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601654619] [2021-07-09 17:30:22,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601654619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:22,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495432739] [2021-07-09 17:30:22,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:22,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:22,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:22,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:30:22,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:22,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:22,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:22,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,838 INFO L628 ElimStorePlain]: treesize reduction 74, result has 39.8 percent of original size [2021-07-09 17:30:22,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:30:22,842 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:22,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:22,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:30:22,863 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:22,877 INFO L518 ElimStorePlain]: Eliminatee v_prenex_88 vanished before elimination [2021-07-09 17:30:22,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:22,878 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:30:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:22,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495432739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:22,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:22,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:22,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472688811] [2021-07-09 17:30:22,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:22,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:22,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:22,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:22,916 INFO L87 Difference]: Start difference. First operand 101 states and 220 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:23,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:23,012 INFO L93 Difference]: Finished difference Result 126 states and 269 transitions. [2021-07-09 17:30:23,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:23,013 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:23,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:23,013 INFO L225 Difference]: With dead ends: 126 [2021-07-09 17:30:23,013 INFO L226 Difference]: Without dead ends: 126 [2021-07-09 17:30:23,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:23,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-09 17:30:23,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2021-07-09 17:30:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.2) internal successors, (220), 100 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 220 transitions. [2021-07-09 17:30:23,015 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 220 transitions. Word has length 17 [2021-07-09 17:30:23,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:23,015 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 220 transitions. [2021-07-09 17:30:23,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:23,015 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 220 transitions. [2021-07-09 17:30:23,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:23,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:23,015 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:23,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-07-09 17:30:23,216 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:23,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:23,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1342622578, now seen corresponding path program 93 times [2021-07-09 17:30:23,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:23,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777246175] [2021-07-09 17:30:23,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:23,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:23,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:23,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777246175] [2021-07-09 17:30:23,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777246175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:23,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121502390] [2021-07-09 17:30:23,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:23,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:23,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:23,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:23,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:23,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:23,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:23,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:23,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:23,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:23,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:23,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:23,475 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:30:23,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:30:23,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:23,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:23,492 INFO L518 ElimStorePlain]: Eliminatee v_prenex_91 vanished before elimination [2021-07-09 17:30:23,492 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:23,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:23,494 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:30:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:23,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121502390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:23,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:23,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:23,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84998036] [2021-07-09 17:30:23,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:23,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:23,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:23,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:23,517 INFO L87 Difference]: Start difference. First operand 101 states and 220 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:23,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:23,713 INFO L93 Difference]: Finished difference Result 105 states and 226 transitions. [2021-07-09 17:30:23,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:23,713 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:23,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:23,713 INFO L225 Difference]: With dead ends: 105 [2021-07-09 17:30:23,713 INFO L226 Difference]: Without dead ends: 105 [2021-07-09 17:30:23,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 236.5ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:23,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-09 17:30:23,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2021-07-09 17:30:23,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-07-09 17:30:23,715 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 17 [2021-07-09 17:30:23,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:23,715 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-07-09 17:30:23,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-07-09 17:30:23,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:23,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:23,715 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:23,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-07-09 17:30:23,916 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:23,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:23,916 INFO L82 PathProgramCache]: Analyzing trace with hash 68356102, now seen corresponding path program 94 times [2021-07-09 17:30:23,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:23,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21745] [2021-07-09 17:30:23,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:24,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:24,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21745] [2021-07-09 17:30:24,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:24,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701936642] [2021-07-09 17:30:24,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:24,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:24,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:24,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:24,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:24,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701936642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:24,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:24,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:24,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991090810] [2021-07-09 17:30:24,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:24,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:24,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:24,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:24,129 INFO L87 Difference]: Start difference. First operand 94 states and 205 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:24,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:24,346 INFO L93 Difference]: Finished difference Result 106 states and 224 transitions. [2021-07-09 17:30:24,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:24,346 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:24,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:24,346 INFO L225 Difference]: With dead ends: 106 [2021-07-09 17:30:24,346 INFO L226 Difference]: Without dead ends: 100 [2021-07-09 17:30:24,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:24,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-09 17:30:24,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2021-07-09 17:30:24,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.2065217391304346) internal successors, (203), 92 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:24,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 203 transitions. [2021-07-09 17:30:24,348 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 203 transitions. Word has length 17 [2021-07-09 17:30:24,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:24,348 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 203 transitions. [2021-07-09 17:30:24,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:24,348 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 203 transitions. [2021-07-09 17:30:24,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:24,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:24,348 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:24,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-07-09 17:30:24,563 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:24,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:24,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1716415186, now seen corresponding path program 95 times [2021-07-09 17:30:24,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:24,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258742652] [2021-07-09 17:30:24,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:24,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:24,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258742652] [2021-07-09 17:30:24,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258742652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:24,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354830066] [2021-07-09 17:30:24,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:24,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:30:24,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:24,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:24,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:24,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354830066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:24,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:24,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:24,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936877239] [2021-07-09 17:30:24,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:24,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:24,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:24,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:24,737 INFO L87 Difference]: Start difference. First operand 93 states and 203 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:24,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:24,876 INFO L93 Difference]: Finished difference Result 123 states and 261 transitions. [2021-07-09 17:30:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:24,876 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:24,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:24,877 INFO L225 Difference]: With dead ends: 123 [2021-07-09 17:30:24,877 INFO L226 Difference]: Without dead ends: 123 [2021-07-09 17:30:24,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:24,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-09 17:30:24,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 95. [2021-07-09 17:30:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.202127659574468) internal successors, (207), 94 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:24,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 207 transitions. [2021-07-09 17:30:24,878 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 207 transitions. Word has length 17 [2021-07-09 17:30:24,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:24,878 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 207 transitions. [2021-07-09 17:30:24,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:24,878 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 207 transitions. [2021-07-09 17:30:24,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:24,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:24,879 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:25,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:25,089 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:25,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:25,089 INFO L82 PathProgramCache]: Analyzing trace with hash 930361166, now seen corresponding path program 96 times [2021-07-09 17:30:25,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:25,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049971055] [2021-07-09 17:30:25,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:25,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:25,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049971055] [2021-07-09 17:30:25,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049971055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:25,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429855032] [2021-07-09 17:30:25,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:25,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:30:25,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:25,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:25,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:25,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:25,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:25,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:25,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:25,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:25,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:25,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:25,311 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:30:25,311 INFO L518 ElimStorePlain]: Eliminatee v_prenex_93 vanished before elimination [2021-07-09 17:30:25,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:30:25,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:25,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:25,326 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:25,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:25,327 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:30:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:25,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429855032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:25,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:25,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:25,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832781741] [2021-07-09 17:30:25,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:25,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:25,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:25,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:25,352 INFO L87 Difference]: Start difference. First operand 95 states and 207 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:25,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:25,694 INFO L93 Difference]: Finished difference Result 126 states and 259 transitions. [2021-07-09 17:30:25,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:30:25,694 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:25,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:25,694 INFO L225 Difference]: With dead ends: 126 [2021-07-09 17:30:25,695 INFO L226 Difference]: Without dead ends: 123 [2021-07-09 17:30:25,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 318.8ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:25,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-09 17:30:25,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 100. [2021-07-09 17:30:25,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.202020202020202) internal successors, (218), 99 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:25,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 218 transitions. [2021-07-09 17:30:25,696 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 218 transitions. Word has length 17 [2021-07-09 17:30:25,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:25,696 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 218 transitions. [2021-07-09 17:30:25,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:25,696 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 218 transitions. [2021-07-09 17:30:25,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:25,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:25,697 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:25,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-07-09 17:30:25,905 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:25,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:25,905 INFO L82 PathProgramCache]: Analyzing trace with hash 706429698, now seen corresponding path program 97 times [2021-07-09 17:30:25,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:25,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548291548] [2021-07-09 17:30:25,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:25,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:25,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548291548] [2021-07-09 17:30:25,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548291548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:25,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560289988] [2021-07-09 17:30:25,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:26,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:26,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:26,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560289988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:26,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:26,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:26,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328533527] [2021-07-09 17:30:26,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:26,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:26,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:26,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:26,145 INFO L87 Difference]: Start difference. First operand 100 states and 218 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:26,386 INFO L93 Difference]: Finished difference Result 134 states and 284 transitions. [2021-07-09 17:30:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:30:26,387 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:26,387 INFO L225 Difference]: With dead ends: 134 [2021-07-09 17:30:26,388 INFO L226 Difference]: Without dead ends: 134 [2021-07-09 17:30:26,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:26,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-09 17:30:26,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 100. [2021-07-09 17:30:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.202020202020202) internal successors, (218), 99 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 218 transitions. [2021-07-09 17:30:26,389 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 218 transitions. Word has length 17 [2021-07-09 17:30:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:26,389 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 218 transitions. [2021-07-09 17:30:26,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 218 transitions. [2021-07-09 17:30:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:26,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:26,390 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:26,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:26,595 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:26,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:26,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2066546438, now seen corresponding path program 98 times [2021-07-09 17:30:26,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:26,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314221930] [2021-07-09 17:30:26,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:26,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:26,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314221930] [2021-07-09 17:30:26,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314221930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:26,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315954038] [2021-07-09 17:30:26,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:26,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:26,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:26,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:26,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:26,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:26,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:26,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:26,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:26,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:26,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:26,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:26,877 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:30:26,877 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:26,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:30:26,880 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:26,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:26,890 INFO L518 ElimStorePlain]: Eliminatee v_prenex_96 vanished before elimination [2021-07-09 17:30:26,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:26,892 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:30:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:26,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315954038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:26,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:26,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:26,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587880613] [2021-07-09 17:30:26,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:26,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:26,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:26,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:26,914 INFO L87 Difference]: Start difference. First operand 100 states and 218 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:27,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:27,129 INFO L93 Difference]: Finished difference Result 111 states and 238 transitions. [2021-07-09 17:30:27,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:27,130 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:27,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:27,130 INFO L225 Difference]: With dead ends: 111 [2021-07-09 17:30:27,130 INFO L226 Difference]: Without dead ends: 111 [2021-07-09 17:30:27,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:27,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-09 17:30:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 94. [2021-07-09 17:30:27,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:27,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-07-09 17:30:27,132 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 17 [2021-07-09 17:30:27,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:27,132 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-07-09 17:30:27,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:27,132 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-07-09 17:30:27,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:27,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:27,132 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:27,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:27,333 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:27,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1176422954, now seen corresponding path program 99 times [2021-07-09 17:30:27,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:27,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177789348] [2021-07-09 17:30:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:27,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:27,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177789348] [2021-07-09 17:30:27,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177789348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:27,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066188109] [2021-07-09 17:30:27,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:27,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:27,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:27,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:27,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:27,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:27,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:27,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:27,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:27,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:27,507 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:27,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:27,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:27,509 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:27,544 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:30:27,545 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:27,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:27,545 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:30:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:27,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066188109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:27,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:27,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:27,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945638113] [2021-07-09 17:30:27,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:27,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:27,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:27,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:27,570 INFO L87 Difference]: Start difference. First operand 94 states and 205 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:27,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:27,718 INFO L93 Difference]: Finished difference Result 139 states and 285 transitions. [2021-07-09 17:30:27,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:30:27,719 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:27,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:27,719 INFO L225 Difference]: With dead ends: 139 [2021-07-09 17:30:27,719 INFO L226 Difference]: Without dead ends: 136 [2021-07-09 17:30:27,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:27,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-09 17:30:27,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 101. [2021-07-09 17:30:27,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.22) internal successors, (222), 100 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:27,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 222 transitions. [2021-07-09 17:30:27,721 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 222 transitions. Word has length 17 [2021-07-09 17:30:27,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:27,721 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 222 transitions. [2021-07-09 17:30:27,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:27,721 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 222 transitions. [2021-07-09 17:30:27,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:27,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:27,721 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:27,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-07-09 17:30:27,922 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:27,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:27,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1400354422, now seen corresponding path program 100 times [2021-07-09 17:30:27,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:27,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239383039] [2021-07-09 17:30:27,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:27,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:27,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239383039] [2021-07-09 17:30:27,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239383039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:27,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010059006] [2021-07-09 17:30:27,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:28,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:28,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:28,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:28,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:28,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010059006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:28,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:28,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:28,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282298862] [2021-07-09 17:30:28,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:28,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:28,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:28,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:28,108 INFO L87 Difference]: Start difference. First operand 101 states and 222 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:28,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:28,265 INFO L93 Difference]: Finished difference Result 133 states and 276 transitions. [2021-07-09 17:30:28,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:28,265 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:28,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:28,266 INFO L225 Difference]: With dead ends: 133 [2021-07-09 17:30:28,266 INFO L226 Difference]: Without dead ends: 133 [2021-07-09 17:30:28,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:28,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-09 17:30:28,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 101. [2021-07-09 17:30:28,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.22) internal successors, (222), 100 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:28,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 222 transitions. [2021-07-09 17:30:28,267 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 222 transitions. Word has length 17 [2021-07-09 17:30:28,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:28,267 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 222 transitions. [2021-07-09 17:30:28,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:28,267 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 222 transitions. [2021-07-09 17:30:28,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:28,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:28,268 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:28,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:28,484 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:28,484 INFO L82 PathProgramCache]: Analyzing trace with hash -40237682, now seen corresponding path program 101 times [2021-07-09 17:30:28,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:28,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170278474] [2021-07-09 17:30:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:28,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:28,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170278474] [2021-07-09 17:30:28,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170278474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:28,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026607996] [2021-07-09 17:30:28,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:28,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:30:28,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:28,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:28,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:28,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:28,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:28,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:28,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:28,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:28,650 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:28,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:28,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:28,683 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:30:28,683 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:28,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:28,684 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:30:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:28,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026607996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:28,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:28,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:28,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002611833] [2021-07-09 17:30:28,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:28,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:28,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:28,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:28,706 INFO L87 Difference]: Start difference. First operand 101 states and 222 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:28,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:28,896 INFO L93 Difference]: Finished difference Result 144 states and 297 transitions. [2021-07-09 17:30:28,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:30:28,896 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:28,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:28,896 INFO L225 Difference]: With dead ends: 144 [2021-07-09 17:30:28,896 INFO L226 Difference]: Without dead ends: 144 [2021-07-09 17:30:28,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:28,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-09 17:30:28,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 100. [2021-07-09 17:30:28,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.2222222222222223) internal successors, (220), 99 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:28,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 220 transitions. [2021-07-09 17:30:28,898 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 220 transitions. Word has length 17 [2021-07-09 17:30:28,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:28,898 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 220 transitions. [2021-07-09 17:30:28,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:28,898 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 220 transitions. [2021-07-09 17:30:28,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:28,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:28,898 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:29,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable534 [2021-07-09 17:30:29,115 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:29,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:29,115 INFO L82 PathProgramCache]: Analyzing trace with hash 2021677620, now seen corresponding path program 102 times [2021-07-09 17:30:29,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:29,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946239542] [2021-07-09 17:30:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:29,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:29,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946239542] [2021-07-09 17:30:29,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946239542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:29,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753570905] [2021-07-09 17:30:29,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:29,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:30:29,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:29,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:29,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:29,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753570905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:29,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:29,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:29,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543188641] [2021-07-09 17:30:29,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:29,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:29,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:29,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:29,286 INFO L87 Difference]: Start difference. First operand 100 states and 220 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:29,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:29,478 INFO L93 Difference]: Finished difference Result 109 states and 233 transitions. [2021-07-09 17:30:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:29,478 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:29,478 INFO L225 Difference]: With dead ends: 109 [2021-07-09 17:30:29,479 INFO L226 Difference]: Without dead ends: 105 [2021-07-09 17:30:29,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:29,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-09 17:30:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2021-07-09 17:30:29,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.212121212121212) internal successors, (219), 99 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 219 transitions. [2021-07-09 17:30:29,480 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 219 transitions. Word has length 17 [2021-07-09 17:30:29,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:29,480 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 219 transitions. [2021-07-09 17:30:29,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 219 transitions. [2021-07-09 17:30:29,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:29,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:29,480 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:29,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:29,681 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:29,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:29,681 INFO L82 PathProgramCache]: Analyzing trace with hash 2108558854, now seen corresponding path program 103 times [2021-07-09 17:30:29,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:29,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446758261] [2021-07-09 17:30:29,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:29,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:29,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446758261] [2021-07-09 17:30:29,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446758261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:29,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449059775] [2021-07-09 17:30:29,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:29,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:29,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:29,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:29,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:29,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:29,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:29,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:29,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:29,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:29,854 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:30:29,854 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:29,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:29,855 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:30:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:29,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449059775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:29,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:29,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:30:29,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345910459] [2021-07-09 17:30:29,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:30:29,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:29,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:30:29,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:30:29,863 INFO L87 Difference]: Start difference. First operand 100 states and 219 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:29,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:29,975 INFO L93 Difference]: Finished difference Result 121 states and 258 transitions. [2021-07-09 17:30:29,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:29,975 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:29,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:29,975 INFO L225 Difference]: With dead ends: 121 [2021-07-09 17:30:29,976 INFO L226 Difference]: Without dead ends: 121 [2021-07-09 17:30:29,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:29,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-09 17:30:29,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2021-07-09 17:30:29,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.202127659574468) internal successors, (207), 94 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:29,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 207 transitions. [2021-07-09 17:30:29,977 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 207 transitions. Word has length 17 [2021-07-09 17:30:29,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:29,977 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 207 transitions. [2021-07-09 17:30:29,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:29,977 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 207 transitions. [2021-07-09 17:30:29,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:29,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:29,977 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:30,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:30,193 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:30,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:30,193 INFO L82 PathProgramCache]: Analyzing trace with hash -422510062, now seen corresponding path program 104 times [2021-07-09 17:30:30,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:30,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382558288] [2021-07-09 17:30:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:30,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:30,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382558288] [2021-07-09 17:30:30,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382558288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:30,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089824853] [2021-07-09 17:30:30,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:30,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:30,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:30,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:30,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:30,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089824853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:30,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:30,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:30,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816645576] [2021-07-09 17:30:30,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:30,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:30,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:30,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:30,410 INFO L87 Difference]: Start difference. First operand 95 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:30,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:30,564 INFO L93 Difference]: Finished difference Result 107 states and 225 transitions. [2021-07-09 17:30:30,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:30,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:30,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:30,564 INFO L225 Difference]: With dead ends: 107 [2021-07-09 17:30:30,564 INFO L226 Difference]: Without dead ends: 98 [2021-07-09 17:30:30,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:30,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-09 17:30:30,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2021-07-09 17:30:30,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1914893617021276) internal successors, (206), 94 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 206 transitions. [2021-07-09 17:30:30,566 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 206 transitions. Word has length 17 [2021-07-09 17:30:30,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:30,566 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 206 transitions. [2021-07-09 17:30:30,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:30,566 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 206 transitions. [2021-07-09 17:30:30,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:30,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:30,566 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:30,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-07-09 17:30:30,781 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:30,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:30,781 INFO L82 PathProgramCache]: Analyzing trace with hash -872286010, now seen corresponding path program 105 times [2021-07-09 17:30:30,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:30,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454083699] [2021-07-09 17:30:30,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:30,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:30,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454083699] [2021-07-09 17:30:30,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454083699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:30,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160278280] [2021-07-09 17:30:30,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:30,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:30,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:30,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:30,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:30,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160278280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:30,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:30,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:30:30,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670719896] [2021-07-09 17:30:30,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:30,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:30,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:30,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:30,997 INFO L87 Difference]: Start difference. First operand 95 states and 206 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:31,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:31,084 INFO L93 Difference]: Finished difference Result 110 states and 236 transitions. [2021-07-09 17:30:31,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:31,084 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:31,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:31,084 INFO L225 Difference]: With dead ends: 110 [2021-07-09 17:30:31,084 INFO L226 Difference]: Without dead ends: 110 [2021-07-09 17:30:31,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:31,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-07-09 17:30:31,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 95. [2021-07-09 17:30:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1914893617021276) internal successors, (206), 94 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:31,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 206 transitions. [2021-07-09 17:30:31,086 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 206 transitions. Word has length 17 [2021-07-09 17:30:31,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:31,086 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 206 transitions. [2021-07-09 17:30:31,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:31,086 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 206 transitions. [2021-07-09 17:30:31,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:31,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:31,086 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:31,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-07-09 17:30:31,297 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:31,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:31,297 INFO L82 PathProgramCache]: Analyzing trace with hash 529843146, now seen corresponding path program 106 times [2021-07-09 17:30:31,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:31,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055330880] [2021-07-09 17:30:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:31,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:31,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055330880] [2021-07-09 17:30:31,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055330880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:31,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756429354] [2021-07-09 17:30:31,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:31,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:31,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:31,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:31,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:31,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:31,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756429354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:31,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:31,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:31,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936348089] [2021-07-09 17:30:31,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:31,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:31,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:31,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:31,529 INFO L87 Difference]: Start difference. First operand 95 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:31,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:31,796 INFO L93 Difference]: Finished difference Result 105 states and 222 transitions. [2021-07-09 17:30:31,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:31,796 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:31,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:31,796 INFO L225 Difference]: With dead ends: 105 [2021-07-09 17:30:31,796 INFO L226 Difference]: Without dead ends: 99 [2021-07-09 17:30:31,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:31,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-09 17:30:31,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2021-07-09 17:30:31,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1914893617021276) internal successors, (206), 94 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:31,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 206 transitions. [2021-07-09 17:30:31,798 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 206 transitions. Word has length 17 [2021-07-09 17:30:31,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:31,798 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 206 transitions. [2021-07-09 17:30:31,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:31,798 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 206 transitions. [2021-07-09 17:30:31,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:31,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:31,798 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:31,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable562,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:31,999 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:31,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:31,999 INFO L82 PathProgramCache]: Analyzing trace with hash -2117065066, now seen corresponding path program 107 times [2021-07-09 17:30:31,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:31,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589005070] [2021-07-09 17:30:31,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:32,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:32,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589005070] [2021-07-09 17:30:32,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589005070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:32,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576187707] [2021-07-09 17:30:32,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:32,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:30:32,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:32,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:32,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:32,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576187707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:32,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:32,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:32,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260066564] [2021-07-09 17:30:32,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:32,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:32,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:32,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:32,220 INFO L87 Difference]: Start difference. First operand 95 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:32,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:32,448 INFO L93 Difference]: Finished difference Result 123 states and 262 transitions. [2021-07-09 17:30:32,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:32,449 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:32,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:32,449 INFO L225 Difference]: With dead ends: 123 [2021-07-09 17:30:32,449 INFO L226 Difference]: Without dead ends: 123 [2021-07-09 17:30:32,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 262.0ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:32,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-09 17:30:32,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2021-07-09 17:30:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1894736842105265) internal successors, (208), 95 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:32,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 208 transitions. [2021-07-09 17:30:32,450 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 208 transitions. Word has length 17 [2021-07-09 17:30:32,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:32,451 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 208 transitions. [2021-07-09 17:30:32,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:32,451 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 208 transitions. [2021-07-09 17:30:32,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:32,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:32,451 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:32,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-07-09 17:30:32,651 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:32,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:32,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1391848210, now seen corresponding path program 108 times [2021-07-09 17:30:32,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:32,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601731211] [2021-07-09 17:30:32,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:32,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:32,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601731211] [2021-07-09 17:30:32,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601731211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:32,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310059409] [2021-07-09 17:30:32,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:32,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:30:32,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:32,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:30:32,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:32,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:32,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:32,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:32,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:32,910 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.7 percent of original size [2021-07-09 17:30:32,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:30:32,914 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:30:32,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:32,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:30:32,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:32,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:32,949 INFO L518 ElimStorePlain]: Eliminatee v_prenex_103 vanished before elimination [2021-07-09 17:30:32,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:32,950 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-07-09 17:30:32,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:32,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310059409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:32,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:32,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:32,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549977765] [2021-07-09 17:30:32,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:32,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:32,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:32,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:32,984 INFO L87 Difference]: Start difference. First operand 96 states and 208 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:33,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:33,193 INFO L93 Difference]: Finished difference Result 123 states and 253 transitions. [2021-07-09 17:30:33,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:33,194 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:33,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:33,194 INFO L225 Difference]: With dead ends: 123 [2021-07-09 17:30:33,194 INFO L226 Difference]: Without dead ends: 120 [2021-07-09 17:30:33,194 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:33,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-09 17:30:33,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 101. [2021-07-09 17:30:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.19) internal successors, (219), 100 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 219 transitions. [2021-07-09 17:30:33,196 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 219 transitions. Word has length 17 [2021-07-09 17:30:33,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:33,196 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 219 transitions. [2021-07-09 17:30:33,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:33,196 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 219 transitions. [2021-07-09 17:30:33,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:33,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:33,196 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:33,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:33,397 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:33,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:33,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1167916742, now seen corresponding path program 109 times [2021-07-09 17:30:33,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:33,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471401410] [2021-07-09 17:30:33,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:33,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:33,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:33,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471401410] [2021-07-09 17:30:33,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471401410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:33,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954082906] [2021-07-09 17:30:33,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:33,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:33,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:33,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954082906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:33,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:33,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:30:33,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989055453] [2021-07-09 17:30:33,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:33,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:33,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:33,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:33,664 INFO L87 Difference]: Start difference. First operand 101 states and 219 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:33,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:33,969 INFO L93 Difference]: Finished difference Result 134 states and 285 transitions. [2021-07-09 17:30:33,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:33,969 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:33,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:33,969 INFO L225 Difference]: With dead ends: 134 [2021-07-09 17:30:33,969 INFO L226 Difference]: Without dead ends: 134 [2021-07-09 17:30:33,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 342.7ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:30:33,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-09 17:30:33,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 101. [2021-07-09 17:30:33,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.19) internal successors, (219), 100 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:33,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 219 transitions. [2021-07-09 17:30:33,971 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 219 transitions. Word has length 17 [2021-07-09 17:30:33,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:33,971 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 219 transitions. [2021-07-09 17:30:33,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:33,971 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 219 transitions. [2021-07-09 17:30:33,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:33,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:33,971 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:34,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-07-09 17:30:34,187 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:34,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:34,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1766933814, now seen corresponding path program 110 times [2021-07-09 17:30:34,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:34,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504260329] [2021-07-09 17:30:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:34,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:34,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504260329] [2021-07-09 17:30:34,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504260329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:34,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061466927] [2021-07-09 17:30:34,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:34,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:34,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:34,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:34,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:34,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:34,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:34,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:34,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:34,428 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:30:34,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:30:34,431 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:34,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:34,443 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:34,443 INFO L518 ElimStorePlain]: Eliminatee v_prenex_106 vanished before elimination [2021-07-09 17:30:34,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:34,444 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:30:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:34,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061466927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:34,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:34,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:34,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110209346] [2021-07-09 17:30:34,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:34,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:34,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:34,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:34,468 INFO L87 Difference]: Start difference. First operand 101 states and 219 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:34,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:34,703 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2021-07-09 17:30:34,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:34,703 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:34,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:34,704 INFO L225 Difference]: With dead ends: 108 [2021-07-09 17:30:34,704 INFO L226 Difference]: Without dead ends: 108 [2021-07-09 17:30:34,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 271.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:34,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-07-09 17:30:34,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2021-07-09 17:30:34,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1956521739130435) internal successors, (202), 92 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:34,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 202 transitions. [2021-07-09 17:30:34,705 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 202 transitions. Word has length 17 [2021-07-09 17:30:34,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:34,705 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 202 transitions. [2021-07-09 17:30:34,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:34,705 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 202 transitions. [2021-07-09 17:30:34,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:34,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:34,705 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:34,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:34,906 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:34,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:34,906 INFO L82 PathProgramCache]: Analyzing trace with hash -2045898038, now seen corresponding path program 111 times [2021-07-09 17:30:34,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:34,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842581162] [2021-07-09 17:30:34,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:34,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:34,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842581162] [2021-07-09 17:30:34,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842581162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:34,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111745249] [2021-07-09 17:30:34,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:35,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:35,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:35,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:35,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:35,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:35,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111745249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:35,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:35,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:35,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511639793] [2021-07-09 17:30:35,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:35,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:35,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:35,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:35,110 INFO L87 Difference]: Start difference. First operand 93 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:35,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:35,296 INFO L93 Difference]: Finished difference Result 104 states and 220 transitions. [2021-07-09 17:30:35,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:35,297 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:35,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:35,297 INFO L225 Difference]: With dead ends: 104 [2021-07-09 17:30:35,297 INFO L226 Difference]: Without dead ends: 98 [2021-07-09 17:30:35,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:35,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-09 17:30:35,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2021-07-09 17:30:35,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:35,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-07-09 17:30:35,298 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-07-09 17:30:35,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:35,298 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-07-09 17:30:35,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-07-09 17:30:35,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:35,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:35,299 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:35,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-07-09 17:30:35,509 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:35,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:35,509 INFO L82 PathProgramCache]: Analyzing trace with hash -397838954, now seen corresponding path program 112 times [2021-07-09 17:30:35,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:35,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364656387] [2021-07-09 17:30:35,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:35,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:35,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:35,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364656387] [2021-07-09 17:30:35,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364656387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:35,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764076180] [2021-07-09 17:30:35,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:35,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:35,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:35,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:35,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:35,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764076180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:35,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:35,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:35,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278563943] [2021-07-09 17:30:35,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:35,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:35,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:35,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:35,708 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:35,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:35,803 INFO L93 Difference]: Finished difference Result 116 states and 248 transitions. [2021-07-09 17:30:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:35,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:35,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:35,804 INFO L225 Difference]: With dead ends: 116 [2021-07-09 17:30:35,804 INFO L226 Difference]: Without dead ends: 116 [2021-07-09 17:30:35,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:35,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-07-09 17:30:35,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 94. [2021-07-09 17:30:35,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:35,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-07-09 17:30:35,805 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-07-09 17:30:35,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:35,805 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-07-09 17:30:35,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:35,805 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-07-09 17:30:35,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:35,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:35,806 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:36,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:36,014 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:36,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:36,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1183892974, now seen corresponding path program 113 times [2021-07-09 17:30:36,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:36,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774834058] [2021-07-09 17:30:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:36,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:36,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774834058] [2021-07-09 17:30:36,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774834058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:36,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318553225] [2021-07-09 17:30:36,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:36,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:30:36,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:36,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:36,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:36,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:36,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:36,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:36,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:36,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:36,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:36,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:36,257 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:30:36,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:30:36,260 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:36,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:36,272 INFO L518 ElimStorePlain]: Eliminatee v_prenex_109 vanished before elimination [2021-07-09 17:30:36,272 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:36,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:36,273 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:30:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:36,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318553225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:36,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:36,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:36,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42111489] [2021-07-09 17:30:36,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:36,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:36,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:36,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:36,298 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:36,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:36,503 INFO L93 Difference]: Finished difference Result 124 states and 255 transitions. [2021-07-09 17:30:36,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:36,503 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:36,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:36,504 INFO L225 Difference]: With dead ends: 124 [2021-07-09 17:30:36,504 INFO L226 Difference]: Without dead ends: 121 [2021-07-09 17:30:36,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:36,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-09 17:30:36,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2021-07-09 17:30:36,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.204081632653061) internal successors, (216), 98 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 216 transitions. [2021-07-09 17:30:36,505 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 216 transitions. Word has length 17 [2021-07-09 17:30:36,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:36,505 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 216 transitions. [2021-07-09 17:30:36,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:36,505 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 216 transitions. [2021-07-09 17:30:36,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:36,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:36,506 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:36,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:36,706 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:36,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:36,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824442, now seen corresponding path program 114 times [2021-07-09 17:30:36,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:36,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098557106] [2021-07-09 17:30:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:36,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:36,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098557106] [2021-07-09 17:30:36,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098557106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:36,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825947900] [2021-07-09 17:30:36,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:36,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:30:36,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:36,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:36,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:36,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825947900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:36,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:36,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:30:36,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657837231] [2021-07-09 17:30:36,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:36,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:36,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:36,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:36,954 INFO L87 Difference]: Start difference. First operand 99 states and 216 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:37,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:37,175 INFO L93 Difference]: Finished difference Result 148 states and 306 transitions. [2021-07-09 17:30:37,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:37,175 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:37,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:37,175 INFO L225 Difference]: With dead ends: 148 [2021-07-09 17:30:37,175 INFO L226 Difference]: Without dead ends: 148 [2021-07-09 17:30:37,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 220.4ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:37,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-07-09 17:30:37,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 99. [2021-07-09 17:30:37,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.204081632653061) internal successors, (216), 98 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 216 transitions. [2021-07-09 17:30:37,177 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 216 transitions. Word has length 17 [2021-07-09 17:30:37,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:37,177 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 216 transitions. [2021-07-09 17:30:37,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:37,177 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 216 transitions. [2021-07-09 17:30:37,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:37,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:37,177 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:37,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:37,378 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:37,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:37,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1476352022, now seen corresponding path program 115 times [2021-07-09 17:30:37,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:37,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359531141] [2021-07-09 17:30:37,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:37,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:37,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359531141] [2021-07-09 17:30:37,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359531141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:37,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023745389] [2021-07-09 17:30:37,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:37,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:37,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:37,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023745389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:37,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:37,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:37,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521838292] [2021-07-09 17:30:37,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:37,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:37,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:37,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:37,591 INFO L87 Difference]: Start difference. First operand 99 states and 216 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:37,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:37,722 INFO L93 Difference]: Finished difference Result 124 states and 263 transitions. [2021-07-09 17:30:37,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:37,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:37,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:37,723 INFO L225 Difference]: With dead ends: 124 [2021-07-09 17:30:37,723 INFO L226 Difference]: Without dead ends: 122 [2021-07-09 17:30:37,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-07-09 17:30:37,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2021-07-09 17:30:37,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.193877551020408) internal successors, (215), 98 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:37,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 215 transitions. [2021-07-09 17:30:37,724 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 215 transitions. Word has length 17 [2021-07-09 17:30:37,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:37,724 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 215 transitions. [2021-07-09 17:30:37,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:37,724 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 215 transitions. [2021-07-09 17:30:37,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:37,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:37,724 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:37,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable628 [2021-07-09 17:30:37,925 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:37,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:37,925 INFO L82 PathProgramCache]: Analyzing trace with hash -47707702, now seen corresponding path program 116 times [2021-07-09 17:30:37,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:37,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238444240] [2021-07-09 17:30:37,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:37,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:37,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238444240] [2021-07-09 17:30:37,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238444240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:37,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959330531] [2021-07-09 17:30:37,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:38,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:38,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:38,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:38,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:38,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:38,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:38,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,148 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:30:38,149 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:38,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:30:38,151 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:38,164 INFO L518 ElimStorePlain]: Eliminatee v_prenex_112 vanished before elimination [2021-07-09 17:30:38,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:38,165 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:30:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:38,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959330531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:38,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:38,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:38,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857726244] [2021-07-09 17:30:38,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:38,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:38,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:38,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:38,188 INFO L87 Difference]: Start difference. First operand 99 states and 215 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:38,333 INFO L93 Difference]: Finished difference Result 107 states and 230 transitions. [2021-07-09 17:30:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:38,334 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:38,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:38,334 INFO L225 Difference]: With dead ends: 107 [2021-07-09 17:30:38,334 INFO L226 Difference]: Without dead ends: 107 [2021-07-09 17:30:38,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:38,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-07-09 17:30:38,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2021-07-09 17:30:38,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1956521739130435) internal successors, (202), 92 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 202 transitions. [2021-07-09 17:30:38,335 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 202 transitions. Word has length 17 [2021-07-09 17:30:38,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:38,335 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 202 transitions. [2021-07-09 17:30:38,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:38,335 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 202 transitions. [2021-07-09 17:30:38,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:38,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:38,336 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:38,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:38,536 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:38,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:38,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1004290202, now seen corresponding path program 117 times [2021-07-09 17:30:38,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:38,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234753861] [2021-07-09 17:30:38,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:38,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:38,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:38,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:38,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234753861] [2021-07-09 17:30:38,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234753861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:38,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737977472] [2021-07-09 17:30:38,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:38,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:38,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:38,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:38,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:38,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:38,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:38,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:38,746 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:38,749 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,781 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:30:38,781 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:38,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:38,782 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:30:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:38,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737977472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:38,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:38,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:38,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748301944] [2021-07-09 17:30:38,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:38,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:38,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:38,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:38,807 INFO L87 Difference]: Start difference. First operand 93 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:39,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:39,000 INFO L93 Difference]: Finished difference Result 135 states and 276 transitions. [2021-07-09 17:30:39,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:39,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:39,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:39,001 INFO L225 Difference]: With dead ends: 135 [2021-07-09 17:30:39,001 INFO L226 Difference]: Without dead ends: 132 [2021-07-09 17:30:39,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 252.6ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:39,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-07-09 17:30:39,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 100. [2021-07-09 17:30:39,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.212121212121212) internal successors, (219), 99 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 219 transitions. [2021-07-09 17:30:39,002 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 219 transitions. Word has length 17 [2021-07-09 17:30:39,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:39,002 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 219 transitions. [2021-07-09 17:30:39,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:39,003 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 219 transitions. [2021-07-09 17:30:39,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:39,003 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:39,003 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:39,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable646 [2021-07-09 17:30:39,203 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:39,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:39,204 INFO L82 PathProgramCache]: Analyzing trace with hash 780358734, now seen corresponding path program 118 times [2021-07-09 17:30:39,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:39,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158763045] [2021-07-09 17:30:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:39,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:39,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158763045] [2021-07-09 17:30:39,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158763045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:39,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869998335] [2021-07-09 17:30:39,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:39,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:39,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:39,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:39,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:39,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869998335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:39,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:39,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:30:39,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042814692] [2021-07-09 17:30:39,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:39,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:39,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:39,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:39,399 INFO L87 Difference]: Start difference. First operand 100 states and 219 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:39,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:39,587 INFO L93 Difference]: Finished difference Result 127 states and 264 transitions. [2021-07-09 17:30:39,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:39,587 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:39,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:39,587 INFO L225 Difference]: With dead ends: 127 [2021-07-09 17:30:39,587 INFO L226 Difference]: Without dead ends: 127 [2021-07-09 17:30:39,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-09 17:30:39,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2021-07-09 17:30:39,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.212121212121212) internal successors, (219), 99 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:39,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 219 transitions. [2021-07-09 17:30:39,589 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 219 transitions. Word has length 17 [2021-07-09 17:30:39,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:39,589 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 219 transitions. [2021-07-09 17:30:39,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:39,589 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 219 transitions. [2021-07-09 17:30:39,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:39,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:39,589 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:39,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-07-09 17:30:39,794 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:39,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:39,794 INFO L82 PathProgramCache]: Analyzing trace with hash 2140475474, now seen corresponding path program 119 times [2021-07-09 17:30:39,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:39,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736827902] [2021-07-09 17:30:39,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:39,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:39,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736827902] [2021-07-09 17:30:39,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736827902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:39,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770500384] [2021-07-09 17:30:39,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:39,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:30:39,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:39,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:39,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:39,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:39,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:39,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:39,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:39,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:39,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:39,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:39,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:39,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:39,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:39,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:39,991 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:39,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:39,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:39,994 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:40,024 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:30:40,025 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:40,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:40,037 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:30:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:40,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770500384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:40,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:40,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:40,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585414595] [2021-07-09 17:30:40,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:40,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:40,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:40,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:40,062 INFO L87 Difference]: Start difference. First operand 100 states and 219 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:40,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:40,259 INFO L93 Difference]: Finished difference Result 138 states and 285 transitions. [2021-07-09 17:30:40,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:40,259 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:40,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:40,260 INFO L225 Difference]: With dead ends: 138 [2021-07-09 17:30:40,260 INFO L226 Difference]: Without dead ends: 138 [2021-07-09 17:30:40,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 228.7ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:40,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-09 17:30:40,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 99. [2021-07-09 17:30:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.2142857142857144) internal successors, (217), 98 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 217 transitions. [2021-07-09 17:30:40,261 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 217 transitions. Word has length 17 [2021-07-09 17:30:40,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:40,261 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 217 transitions. [2021-07-09 17:30:40,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:40,261 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 217 transitions. [2021-07-09 17:30:40,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:40,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:40,262 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:40,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-07-09 17:30:40,462 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:40,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:40,463 INFO L82 PathProgramCache]: Analyzing trace with hash -92576520, now seen corresponding path program 120 times [2021-07-09 17:30:40,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:40,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393922728] [2021-07-09 17:30:40,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:40,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:40,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393922728] [2021-07-09 17:30:40,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393922728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:40,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618529875] [2021-07-09 17:30:40,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:40,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:30:40,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:40,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:30:40,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:40,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618529875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:40,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:40,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:40,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69407960] [2021-07-09 17:30:40,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:40,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:40,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:40,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:40,645 INFO L87 Difference]: Start difference. First operand 99 states and 217 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:40,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:40,752 INFO L93 Difference]: Finished difference Result 106 states and 227 transitions. [2021-07-09 17:30:40,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:40,752 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:40,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:40,753 INFO L225 Difference]: With dead ends: 106 [2021-07-09 17:30:40,753 INFO L226 Difference]: Without dead ends: 102 [2021-07-09 17:30:40,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 161.5ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:40,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-09 17:30:40,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2021-07-09 17:30:40,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.204081632653061) internal successors, (216), 98 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:40,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 216 transitions. [2021-07-09 17:30:40,754 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 216 transitions. Word has length 17 [2021-07-09 17:30:40,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:40,754 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 216 transitions. [2021-07-09 17:30:40,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:40,754 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 216 transitions. [2021-07-09 17:30:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:40,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:40,755 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:40,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable679,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:40,966 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:40,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:40,966 INFO L82 PathProgramCache]: Analyzing trace with hash -5695286, now seen corresponding path program 121 times [2021-07-09 17:30:40,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:40,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184927475] [2021-07-09 17:30:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:41,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:41,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184927475] [2021-07-09 17:30:41,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184927475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:41,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010056836] [2021-07-09 17:30:41,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:30:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:41,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:41,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:41,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:41,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:41,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:41,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:41,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:41,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:41,174 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:41,185 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:30:41,185 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:41,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:41,186 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:30:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:41,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010056836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:41,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:41,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:41,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476292546] [2021-07-09 17:30:41,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:41,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:41,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:41,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:41,192 INFO L87 Difference]: Start difference. First operand 99 states and 216 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:41,301 INFO L93 Difference]: Finished difference Result 115 states and 246 transitions. [2021-07-09 17:30:41,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:41,301 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:41,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:41,302 INFO L225 Difference]: With dead ends: 115 [2021-07-09 17:30:41,302 INFO L226 Difference]: Without dead ends: 115 [2021-07-09 17:30:41,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:41,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-07-09 17:30:41,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2021-07-09 17:30:41,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.197802197802198) internal successors, (200), 91 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:41,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 200 transitions. [2021-07-09 17:30:41,303 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 200 transitions. Word has length 17 [2021-07-09 17:30:41,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:41,303 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 200 transitions. [2021-07-09 17:30:41,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:41,303 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 200 transitions. [2021-07-09 17:30:41,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:41,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:41,305 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:41,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-07-09 17:30:41,517 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:41,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:41,517 INFO L82 PathProgramCache]: Analyzing trace with hash 118491922, now seen corresponding path program 122 times [2021-07-09 17:30:41,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:41,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351680857] [2021-07-09 17:30:41,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:41,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:41,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351680857] [2021-07-09 17:30:41,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351680857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:41,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091909839] [2021-07-09 17:30:41,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:41,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:41,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:41,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:41,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:41,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:41,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:41,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:41,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:41,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:41,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:41,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:41,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:41,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:41,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:41,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:41,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:41,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:41,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:41,696 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:41,726 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:30:41,726 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:41,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:41,727 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:30:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:41,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091909839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:41,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:41,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:41,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719455271] [2021-07-09 17:30:41,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:41,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:41,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:41,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:41,752 INFO L87 Difference]: Start difference. First operand 92 states and 200 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:41,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:41,987 INFO L93 Difference]: Finished difference Result 133 states and 273 transitions. [2021-07-09 17:30:41,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:41,988 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:41,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:41,988 INFO L225 Difference]: With dead ends: 133 [2021-07-09 17:30:41,988 INFO L226 Difference]: Without dead ends: 130 [2021-07-09 17:30:41,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:41,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-07-09 17:30:41,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 101. [2021-07-09 17:30:41,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.24) internal successors, (224), 100 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:41,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 224 transitions. [2021-07-09 17:30:41,990 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 224 transitions. Word has length 17 [2021-07-09 17:30:41,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:41,990 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 224 transitions. [2021-07-09 17:30:41,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:41,990 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 224 transitions. [2021-07-09 17:30:41,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:41,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:41,990 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:42,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:42,197 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:42,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:42,197 INFO L82 PathProgramCache]: Analyzing trace with hash -105439546, now seen corresponding path program 123 times [2021-07-09 17:30:42,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:42,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74931001] [2021-07-09 17:30:42,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:42,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:42,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74931001] [2021-07-09 17:30:42,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74931001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:42,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101830562] [2021-07-09 17:30:42,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:42,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:30:42,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:42,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:42,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:42,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101830562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:42,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:42,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:42,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030249936] [2021-07-09 17:30:42,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:42,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:42,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:42,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:42,417 INFO L87 Difference]: Start difference. First operand 101 states and 224 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:42,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:42,624 INFO L93 Difference]: Finished difference Result 131 states and 274 transitions. [2021-07-09 17:30:42,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:42,625 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:42,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:42,625 INFO L225 Difference]: With dead ends: 131 [2021-07-09 17:30:42,625 INFO L226 Difference]: Without dead ends: 131 [2021-07-09 17:30:42,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 249.8ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-09 17:30:42,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2021-07-09 17:30:42,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.24) internal successors, (224), 100 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:42,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 224 transitions. [2021-07-09 17:30:42,627 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 224 transitions. Word has length 17 [2021-07-09 17:30:42,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:42,627 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 224 transitions. [2021-07-09 17:30:42,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:42,627 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 224 transitions. [2021-07-09 17:30:42,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:42,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:42,627 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:42,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-07-09 17:30:42,837 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:42,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:42,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1516230378, now seen corresponding path program 124 times [2021-07-09 17:30:42,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:42,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767972436] [2021-07-09 17:30:42,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:42,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:42,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767972436] [2021-07-09 17:30:42,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767972436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:42,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039284056] [2021-07-09 17:30:42,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:42,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:42,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:42,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:42,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:43,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039284056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:43,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:43,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:43,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527793158] [2021-07-09 17:30:43,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:43,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:43,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:43,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:43,045 INFO L87 Difference]: Start difference. First operand 101 states and 224 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:43,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:43,354 INFO L93 Difference]: Finished difference Result 133 states and 275 transitions. [2021-07-09 17:30:43,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:43,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:43,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:43,355 INFO L225 Difference]: With dead ends: 133 [2021-07-09 17:30:43,355 INFO L226 Difference]: Without dead ends: 131 [2021-07-09 17:30:43,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:43,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-09 17:30:43,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2021-07-09 17:30:43,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.23) internal successors, (223), 100 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:43,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 223 transitions. [2021-07-09 17:30:43,356 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 223 transitions. Word has length 17 [2021-07-09 17:30:43,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:43,356 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 223 transitions. [2021-07-09 17:30:43,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:43,356 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 223 transitions. [2021-07-09 17:30:43,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:43,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:43,357 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:43,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:43,557 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:43,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:43,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1254677194, now seen corresponding path program 125 times [2021-07-09 17:30:43,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:43,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553537630] [2021-07-09 17:30:43,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:43,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:43,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553537630] [2021-07-09 17:30:43,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553537630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:43,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976790929] [2021-07-09 17:30:43,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:43,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:30:43,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:43,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:43,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:43,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:43,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:43,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:43,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:43,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:43,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:43,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:43,756 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:43,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:43,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:43,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:43,760 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:43,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:43,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:43,762 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:43,792 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:30:43,792 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:43,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:43,793 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:30:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:43,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976790929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:43,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:43,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:43,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859850887] [2021-07-09 17:30:43,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:43,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:43,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:43,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:43,816 INFO L87 Difference]: Start difference. First operand 101 states and 223 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:44,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:44,086 INFO L93 Difference]: Finished difference Result 136 states and 281 transitions. [2021-07-09 17:30:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:30:44,086 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:44,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:44,087 INFO L225 Difference]: With dead ends: 136 [2021-07-09 17:30:44,087 INFO L226 Difference]: Without dead ends: 136 [2021-07-09 17:30:44,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 284.3ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:44,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-09 17:30:44,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 100. [2021-07-09 17:30:44,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.2323232323232323) internal successors, (221), 99 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:44,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 221 transitions. [2021-07-09 17:30:44,088 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 221 transitions. Word has length 17 [2021-07-09 17:30:44,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:44,088 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 221 transitions. [2021-07-09 17:30:44,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:44,088 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 221 transitions. [2021-07-09 17:30:44,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:44,089 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:44,089 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:44,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:44,289 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:44,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:44,289 INFO L82 PathProgramCache]: Analyzing trace with hash -978374800, now seen corresponding path program 126 times [2021-07-09 17:30:44,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:44,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188664867] [2021-07-09 17:30:44,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:44,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:44,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188664867] [2021-07-09 17:30:44,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188664867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:44,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347891716] [2021-07-09 17:30:44,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:44,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:30:44,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:44,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:30:44,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:44,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:44,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347891716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:44,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:44,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:44,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373041706] [2021-07-09 17:30:44,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:44,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:44,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:44,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:44,481 INFO L87 Difference]: Start difference. First operand 100 states and 221 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:44,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:44,611 INFO L93 Difference]: Finished difference Result 111 states and 237 transitions. [2021-07-09 17:30:44,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:44,611 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:44,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:44,611 INFO L225 Difference]: With dead ends: 111 [2021-07-09 17:30:44,611 INFO L226 Difference]: Without dead ends: 107 [2021-07-09 17:30:44,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 186.2ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:44,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-07-09 17:30:44,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2021-07-09 17:30:44,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.2222222222222223) internal successors, (220), 99 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:44,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 220 transitions. [2021-07-09 17:30:44,613 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 220 transitions. Word has length 17 [2021-07-09 17:30:44,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:44,613 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 220 transitions. [2021-07-09 17:30:44,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:44,613 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 220 transitions. [2021-07-09 17:30:44,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:44,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:44,613 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:44,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-07-09 17:30:44,814 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:44,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:44,814 INFO L82 PathProgramCache]: Analyzing trace with hash -891493566, now seen corresponding path program 127 times [2021-07-09 17:30:44,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:44,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964020712] [2021-07-09 17:30:44,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:44,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:44,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:44,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964020712] [2021-07-09 17:30:44,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964020712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:44,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734370330] [2021-07-09 17:30:44,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:44,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:44,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:44,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:44,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:44,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:44,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:44,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:44,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:44,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:44,998 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:30:44,998 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:44,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:44,998 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:30:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:45,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734370330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:45,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:45,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:45,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643200844] [2021-07-09 17:30:45,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:45,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:45,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:45,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:45,011 INFO L87 Difference]: Start difference. First operand 100 states and 220 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:45,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:45,218 INFO L93 Difference]: Finished difference Result 123 states and 262 transitions. [2021-07-09 17:30:45,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:45,219 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:45,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:45,219 INFO L225 Difference]: With dead ends: 123 [2021-07-09 17:30:45,219 INFO L226 Difference]: Without dead ends: 123 [2021-07-09 17:30:45,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 234.1ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:45,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-09 17:30:45,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2021-07-09 17:30:45,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.2244897959183674) internal successors, (218), 98 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:45,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 218 transitions. [2021-07-09 17:30:45,220 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 218 transitions. Word has length 17 [2021-07-09 17:30:45,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:45,221 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 218 transitions. [2021-07-09 17:30:45,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:45,221 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 218 transitions. [2021-07-09 17:30:45,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:45,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:45,221 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:45,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-07-09 17:30:45,429 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:45,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:45,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1484721066, now seen corresponding path program 128 times [2021-07-09 17:30:45,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:45,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207021212] [2021-07-09 17:30:45,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:45,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:45,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207021212] [2021-07-09 17:30:45,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207021212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:45,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197193717] [2021-07-09 17:30:45,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:45,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:45,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:45,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:30:45,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:45,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197193717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:45,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:45,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:45,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487526983] [2021-07-09 17:30:45,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:45,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:45,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:45,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:45,613 INFO L87 Difference]: Start difference. First operand 99 states and 218 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:45,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:45,693 INFO L93 Difference]: Finished difference Result 108 states and 231 transitions. [2021-07-09 17:30:45,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:45,694 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:45,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:45,694 INFO L225 Difference]: With dead ends: 108 [2021-07-09 17:30:45,694 INFO L226 Difference]: Without dead ends: 102 [2021-07-09 17:30:45,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:45,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-09 17:30:45,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2021-07-09 17:30:45,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.2142857142857144) internal successors, (217), 98 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:45,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 217 transitions. [2021-07-09 17:30:45,695 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 217 transitions. Word has length 17 [2021-07-09 17:30:45,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:45,695 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 217 transitions. [2021-07-09 17:30:45,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:45,695 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 217 transitions. [2021-07-09 17:30:45,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:45,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:45,696 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:45,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable738 [2021-07-09 17:30:45,896 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:45,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:45,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1296689610, now seen corresponding path program 129 times [2021-07-09 17:30:45,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:45,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806499389] [2021-07-09 17:30:45,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:45,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:45,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806499389] [2021-07-09 17:30:45,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806499389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:45,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637878060] [2021-07-09 17:30:45,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:45,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:45,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:45,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:30:45,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:46,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:46,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:46,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:46,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:46,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:46,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:46,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:46,068 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-07-09 17:30:46,068 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:46,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:46,069 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-07-09 17:30:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:46,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637878060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:46,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:46,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:30:46,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495075036] [2021-07-09 17:30:46,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:46,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:46,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:46,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:46,084 INFO L87 Difference]: Start difference. First operand 99 states and 217 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:46,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:46,154 INFO L93 Difference]: Finished difference Result 111 states and 238 transitions. [2021-07-09 17:30:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:46,155 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:46,155 INFO L225 Difference]: With dead ends: 111 [2021-07-09 17:30:46,155 INFO L226 Difference]: Without dead ends: 111 [2021-07-09 17:30:46,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:46,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-09 17:30:46,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 94. [2021-07-09 17:30:46,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:46,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-07-09 17:30:46,160 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 17 [2021-07-09 17:30:46,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:46,160 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-07-09 17:30:46,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:46,161 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-07-09 17:30:46,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:46,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:46,161 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:46,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-07-09 17:30:46,377 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:46,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:46,377 INFO L82 PathProgramCache]: Analyzing trace with hash -960002918, now seen corresponding path program 130 times [2021-07-09 17:30:46,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:46,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421040997] [2021-07-09 17:30:46,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:46,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:46,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421040997] [2021-07-09 17:30:46,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421040997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:46,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023445461] [2021-07-09 17:30:46,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:46,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:46,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:46,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:46,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:46,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023445461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:46,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:46,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:46,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953313508] [2021-07-09 17:30:46,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:46,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:46,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:46,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:46,556 INFO L87 Difference]: Start difference. First operand 94 states and 205 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:46,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:46,705 INFO L93 Difference]: Finished difference Result 107 states and 225 transitions. [2021-07-09 17:30:46,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:46,706 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:46,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:46,706 INFO L225 Difference]: With dead ends: 107 [2021-07-09 17:30:46,706 INFO L226 Difference]: Without dead ends: 98 [2021-07-09 17:30:46,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:46,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-09 17:30:46,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2021-07-09 17:30:46,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:46,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-07-09 17:30:46,707 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-07-09 17:30:46,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:46,707 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-07-09 17:30:46,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:46,707 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-07-09 17:30:46,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:46,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:46,708 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:46,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable743,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:46,924 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:46,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:46,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1409778866, now seen corresponding path program 131 times [2021-07-09 17:30:46,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:46,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198837229] [2021-07-09 17:30:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:46,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:46,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198837229] [2021-07-09 17:30:46,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198837229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:46,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836648961] [2021-07-09 17:30:46,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:46,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:30:46,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:46,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:46,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:47,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:47,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:47,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:47,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:47,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:47,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:47,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:47,102 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:30:47,102 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:47,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:47,103 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:30:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:47,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836648961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:47,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:47,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:30:47,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818629585] [2021-07-09 17:30:47,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:47,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:47,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:47,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:47,116 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:47,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:47,179 INFO L93 Difference]: Finished difference Result 106 states and 228 transitions. [2021-07-09 17:30:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:47,179 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:47,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:47,179 INFO L225 Difference]: With dead ends: 106 [2021-07-09 17:30:47,179 INFO L226 Difference]: Without dead ends: 106 [2021-07-09 17:30:47,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:47,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-09 17:30:47,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-07-09 17:30:47,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:47,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-07-09 17:30:47,181 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-07-09 17:30:47,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:47,181 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-07-09 17:30:47,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:47,181 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-07-09 17:30:47,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:47,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:47,181 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:47,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable747,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:47,382 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:47,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:47,382 INFO L82 PathProgramCache]: Analyzing trace with hash -7649710, now seen corresponding path program 132 times [2021-07-09 17:30:47,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:47,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498065645] [2021-07-09 17:30:47,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:47,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:47,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498065645] [2021-07-09 17:30:47,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498065645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:47,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878663985] [2021-07-09 17:30:47,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:47,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:30:47,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:47,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:47,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:47,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878663985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:47,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:47,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:47,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555738616] [2021-07-09 17:30:47,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:47,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:47,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:47,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:47,572 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:47,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:47,797 INFO L93 Difference]: Finished difference Result 101 states and 214 transitions. [2021-07-09 17:30:47,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:47,797 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:47,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:47,798 INFO L225 Difference]: With dead ends: 101 [2021-07-09 17:30:47,798 INFO L226 Difference]: Without dead ends: 95 [2021-07-09 17:30:47,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 276.4ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:47,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-07-09 17:30:47,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-07-09 17:30:47,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1914893617021276) internal successors, (206), 94 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:47,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 206 transitions. [2021-07-09 17:30:47,799 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 206 transitions. Word has length 17 [2021-07-09 17:30:47,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:47,799 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 206 transitions. [2021-07-09 17:30:47,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:47,799 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 206 transitions. [2021-07-09 17:30:47,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:47,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:47,799 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:48,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-07-09 17:30:48,000 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:48,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:48,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1640409374, now seen corresponding path program 133 times [2021-07-09 17:30:48,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:48,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050812650] [2021-07-09 17:30:48,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:48,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:48,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050812650] [2021-07-09 17:30:48,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050812650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:48,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216291061] [2021-07-09 17:30:48,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:48,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:48,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:48,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:48,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:48,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:48,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:48,194 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:30:48,194 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:48,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:48,195 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:30:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:48,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216291061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:48,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:48,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:48,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241428739] [2021-07-09 17:30:48,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:48,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:48,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:48,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:48,199 INFO L87 Difference]: Start difference. First operand 95 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:48,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:48,418 INFO L93 Difference]: Finished difference Result 119 states and 254 transitions. [2021-07-09 17:30:48,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:48,419 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:48,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:48,419 INFO L225 Difference]: With dead ends: 119 [2021-07-09 17:30:48,419 INFO L226 Difference]: Without dead ends: 119 [2021-07-09 17:30:48,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:48,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-09 17:30:48,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 95. [2021-07-09 17:30:48,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1914893617021276) internal successors, (206), 94 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:48,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 206 transitions. [2021-07-09 17:30:48,420 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 206 transitions. Word has length 17 [2021-07-09 17:30:48,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:48,420 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 206 transitions. [2021-07-09 17:30:48,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:48,421 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 206 transitions. [2021-07-09 17:30:48,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:48,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:48,421 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:48,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable755 [2021-07-09 17:30:48,621 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:48,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:48,622 INFO L82 PathProgramCache]: Analyzing trace with hash 854355354, now seen corresponding path program 134 times [2021-07-09 17:30:48,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:48,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309067702] [2021-07-09 17:30:48,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:48,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:48,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309067702] [2021-07-09 17:30:48,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309067702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:48,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552655184] [2021-07-09 17:30:48,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:48,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:48,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:48,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:48,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:48,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552655184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:48,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:48,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:48,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086887482] [2021-07-09 17:30:48,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:48,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:48,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:48,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:48,847 INFO L87 Difference]: Start difference. First operand 95 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:49,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:49,186 INFO L93 Difference]: Finished difference Result 121 states and 248 transitions. [2021-07-09 17:30:49,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:49,186 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:49,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:49,186 INFO L225 Difference]: With dead ends: 121 [2021-07-09 17:30:49,186 INFO L226 Difference]: Without dead ends: 118 [2021-07-09 17:30:49,186 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 309.6ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:49,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-07-09 17:30:49,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2021-07-09 17:30:49,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.202020202020202) internal successors, (218), 99 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:49,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 218 transitions. [2021-07-09 17:30:49,188 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 218 transitions. Word has length 17 [2021-07-09 17:30:49,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:49,188 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 218 transitions. [2021-07-09 17:30:49,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:49,188 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 218 transitions. [2021-07-09 17:30:49,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:49,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:49,188 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:49,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:49,389 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:49,389 INFO L82 PathProgramCache]: Analyzing trace with hash 630423886, now seen corresponding path program 135 times [2021-07-09 17:30:49,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:49,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809233958] [2021-07-09 17:30:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:49,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:49,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809233958] [2021-07-09 17:30:49,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809233958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:49,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7913121] [2021-07-09 17:30:49,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:49,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:30:49,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:49,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:49,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:49,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:49,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:49,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:49,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:49,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:49,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:49,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:49,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:49,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:49,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:49,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:49,590 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:49,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:49,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:49,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:49,623 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:30:49,623 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:49,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:49,624 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:30:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:49,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7913121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:49,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:49,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:30:49,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289869695] [2021-07-09 17:30:49,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:49,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:49,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:49,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:49,657 INFO L87 Difference]: Start difference. First operand 100 states and 218 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:50,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:50,042 INFO L93 Difference]: Finished difference Result 140 states and 289 transitions. [2021-07-09 17:30:50,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:30:50,042 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:50,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:50,043 INFO L225 Difference]: With dead ends: 140 [2021-07-09 17:30:50,043 INFO L226 Difference]: Without dead ends: 140 [2021-07-09 17:30:50,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 383.7ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:50,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-07-09 17:30:50,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 100. [2021-07-09 17:30:50,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.202020202020202) internal successors, (218), 99 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:50,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 218 transitions. [2021-07-09 17:30:50,044 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 218 transitions. Word has length 17 [2021-07-09 17:30:50,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:50,044 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 218 transitions. [2021-07-09 17:30:50,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:50,045 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 218 transitions. [2021-07-09 17:30:50,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:50,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:50,045 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:50,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable771 [2021-07-09 17:30:50,245 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:50,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:50,246 INFO L82 PathProgramCache]: Analyzing trace with hash -780366946, now seen corresponding path program 136 times [2021-07-09 17:30:50,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:50,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998590682] [2021-07-09 17:30:50,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:50,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:50,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998590682] [2021-07-09 17:30:50,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998590682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:50,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022266959] [2021-07-09 17:30:50,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:50,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:50,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:50,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:50,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:50,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:50,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:50,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:50,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:50,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:50,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:50,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:50,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:50,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:50,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:50,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:50,445 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:50,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:50,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:50,448 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:50,479 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:30:50,479 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:50,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:50,480 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:30:50,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:50,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022266959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:50,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:50,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:50,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123889672] [2021-07-09 17:30:50,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:50,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:50,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:50,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:50,504 INFO L87 Difference]: Start difference. First operand 100 states and 218 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:50,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:50,765 INFO L93 Difference]: Finished difference Result 117 states and 248 transitions. [2021-07-09 17:30:50,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:50,765 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:50,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:50,766 INFO L225 Difference]: With dead ends: 117 [2021-07-09 17:30:50,766 INFO L226 Difference]: Without dead ends: 115 [2021-07-09 17:30:50,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 276.1ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:50,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-07-09 17:30:50,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2021-07-09 17:30:50,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:50,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 217 transitions. [2021-07-09 17:30:50,767 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 217 transitions. Word has length 17 [2021-07-09 17:30:50,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:50,767 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 217 transitions. [2021-07-09 17:30:50,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:50,767 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 217 transitions. [2021-07-09 17:30:50,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:50,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:50,767 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:50,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-07-09 17:30:50,968 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:50,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:50,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1990540626, now seen corresponding path program 137 times [2021-07-09 17:30:50,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:50,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119846433] [2021-07-09 17:30:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:51,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:51,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119846433] [2021-07-09 17:30:51,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119846433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:51,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595426118] [2021-07-09 17:30:51,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:51,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:30:51,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:51,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:51,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:51,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595426118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:51,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:51,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:51,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774771135] [2021-07-09 17:30:51,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:51,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:51,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:51,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:51,177 INFO L87 Difference]: Start difference. First operand 100 states and 217 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:51,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:51,358 INFO L93 Difference]: Finished difference Result 104 states and 223 transitions. [2021-07-09 17:30:51,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:51,358 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:51,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:51,359 INFO L225 Difference]: With dead ends: 104 [2021-07-09 17:30:51,359 INFO L226 Difference]: Without dead ends: 104 [2021-07-09 17:30:51,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 231.8ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:51,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-09 17:30:51,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2021-07-09 17:30:51,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1956521739130435) internal successors, (202), 92 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:51,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 202 transitions. [2021-07-09 17:30:51,360 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 202 transitions. Word has length 17 [2021-07-09 17:30:51,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:51,360 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 202 transitions. [2021-07-09 17:30:51,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:51,360 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 202 transitions. [2021-07-09 17:30:51,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:51,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:51,360 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:51,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable796 [2021-07-09 17:30:51,576 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:51,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:51,576 INFO L82 PathProgramCache]: Analyzing trace with hash -893447990, now seen corresponding path program 138 times [2021-07-09 17:30:51,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:51,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087577880] [2021-07-09 17:30:51,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:51,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:51,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087577880] [2021-07-09 17:30:51,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087577880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:51,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548806686] [2021-07-09 17:30:51,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:51,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:30:51,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:51,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:51,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:51,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548806686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:51,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:51,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:51,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542736445] [2021-07-09 17:30:51,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:51,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:51,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:51,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:51,741 INFO L87 Difference]: Start difference. First operand 93 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:51,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:51,935 INFO L93 Difference]: Finished difference Result 99 states and 209 transitions. [2021-07-09 17:30:51,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:51,935 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:51,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:51,935 INFO L225 Difference]: With dead ends: 99 [2021-07-09 17:30:51,935 INFO L226 Difference]: Without dead ends: 93 [2021-07-09 17:30:51,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:51,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-09 17:30:51,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-07-09 17:30:51,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1868131868131866) internal successors, (199), 91 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:51,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 199 transitions. [2021-07-09 17:30:51,937 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 199 transitions. Word has length 17 [2021-07-09 17:30:51,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:51,937 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 199 transitions. [2021-07-09 17:30:51,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:51,937 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 199 transitions. [2021-07-09 17:30:51,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:51,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:51,937 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:52,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable808,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:52,141 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:52,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:52,141 INFO L82 PathProgramCache]: Analyzing trace with hash 754611094, now seen corresponding path program 139 times [2021-07-09 17:30:52,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:52,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621086468] [2021-07-09 17:30:52,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:52,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:52,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621086468] [2021-07-09 17:30:52,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621086468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:52,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355877535] [2021-07-09 17:30:52,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:52,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:52,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:52,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:52,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:52,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:52,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:52,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:52,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:52,306 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:52,319 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:30:52,319 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:52,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:52,320 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:30:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:52,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355877535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:52,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:52,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:30:52,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385559629] [2021-07-09 17:30:52,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:52,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:52,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:52,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:52,332 INFO L87 Difference]: Start difference. First operand 92 states and 199 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:52,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:52,432 INFO L93 Difference]: Finished difference Result 111 states and 237 transitions. [2021-07-09 17:30:52,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:52,432 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:52,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:52,432 INFO L225 Difference]: With dead ends: 111 [2021-07-09 17:30:52,432 INFO L226 Difference]: Without dead ends: 111 [2021-07-09 17:30:52,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:52,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-09 17:30:52,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 93. [2021-07-09 17:30:52,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1847826086956523) internal successors, (201), 92 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:52,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 201 transitions. [2021-07-09 17:30:52,434 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 201 transitions. Word has length 17 [2021-07-09 17:30:52,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:52,434 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 201 transitions. [2021-07-09 17:30:52,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:52,434 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 201 transitions. [2021-07-09 17:30:52,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:52,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:52,448 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:52,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable812,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:52,649 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:52,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:52,649 INFO L82 PathProgramCache]: Analyzing trace with hash -31442926, now seen corresponding path program 140 times [2021-07-09 17:30:52,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:52,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723879742] [2021-07-09 17:30:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:52,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:52,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723879742] [2021-07-09 17:30:52,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723879742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:52,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867702986] [2021-07-09 17:30:52,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:52,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:52,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:52,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:52,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:52,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867702986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:52,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:52,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:52,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818799832] [2021-07-09 17:30:52,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:52,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:52,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:52,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:52,846 INFO L87 Difference]: Start difference. First operand 93 states and 201 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:53,056 INFO L93 Difference]: Finished difference Result 117 states and 239 transitions. [2021-07-09 17:30:53,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:53,057 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:53,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:53,057 INFO L225 Difference]: With dead ends: 117 [2021-07-09 17:30:53,057 INFO L226 Difference]: Without dead ends: 114 [2021-07-09 17:30:53,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:53,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-07-09 17:30:53,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 98. [2021-07-09 17:30:53,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.185567010309278) internal successors, (212), 97 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2021-07-09 17:30:53,058 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 17 [2021-07-09 17:30:53,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:53,059 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2021-07-09 17:30:53,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,059 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2021-07-09 17:30:53,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:53,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:53,059 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:53,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable816,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:53,259 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:53,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:53,260 INFO L82 PathProgramCache]: Analyzing trace with hash -255374394, now seen corresponding path program 141 times [2021-07-09 17:30:53,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:53,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296910225] [2021-07-09 17:30:53,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:53,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:53,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296910225] [2021-07-09 17:30:53,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296910225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:53,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90773308] [2021-07-09 17:30:53,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:53,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:53,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:53,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:53,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:53,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:53,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:53,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:53,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:53,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:53,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:53,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:53,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:53,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:53,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:53,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:53,450 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:53,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:53,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:53,453 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:53,483 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:30:53,483 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:53,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:53,485 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:30:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:53,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90773308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:53,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:53,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:30:53,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054911850] [2021-07-09 17:30:53,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:53,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:53,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:53,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:53,517 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:53,731 INFO L93 Difference]: Finished difference Result 128 states and 272 transitions. [2021-07-09 17:30:53,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:53,732 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:53,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:53,732 INFO L225 Difference]: With dead ends: 128 [2021-07-09 17:30:53,732 INFO L226 Difference]: Without dead ends: 128 [2021-07-09 17:30:53,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 237.9ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:53,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-07-09 17:30:53,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2021-07-09 17:30:53,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.185567010309278) internal successors, (212), 97 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2021-07-09 17:30:53,734 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 17 [2021-07-09 17:30:53,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:53,734 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2021-07-09 17:30:53,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,734 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2021-07-09 17:30:53,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:53,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:53,734 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:53,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:53,935 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:53,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:53,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1104742346, now seen corresponding path program 142 times [2021-07-09 17:30:53,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:53,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771230246] [2021-07-09 17:30:53,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:53,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:53,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771230246] [2021-07-09 17:30:53,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771230246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:53,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333599577] [2021-07-09 17:30:53,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:54,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:54,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:54,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:54,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:54,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333599577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:54,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:54,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:54,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742771160] [2021-07-09 17:30:54,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:54,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:54,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:54,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:54,113 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:54,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:54,259 INFO L93 Difference]: Finished difference Result 102 states and 218 transitions. [2021-07-09 17:30:54,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:54,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:54,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:54,260 INFO L225 Difference]: With dead ends: 102 [2021-07-09 17:30:54,260 INFO L226 Difference]: Without dead ends: 102 [2021-07-09 17:30:54,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:54,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-09 17:30:54,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2021-07-09 17:30:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1868131868131866) internal successors, (199), 91 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:54,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 199 transitions. [2021-07-09 17:30:54,261 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 199 transitions. Word has length 17 [2021-07-09 17:30:54,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:54,261 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 199 transitions. [2021-07-09 17:30:54,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:54,261 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 199 transitions. [2021-07-09 17:30:54,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:54,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:54,262 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:54,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-07-09 17:30:54,462 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:54,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:54,462 INFO L82 PathProgramCache]: Analyzing trace with hash -2138227046, now seen corresponding path program 143 times [2021-07-09 17:30:54,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:54,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891540211] [2021-07-09 17:30:54,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:54,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:54,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891540211] [2021-07-09 17:30:54,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891540211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:54,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71051062] [2021-07-09 17:30:54,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:54,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:30:54,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:54,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:54,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:54,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71051062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:54,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:54,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:54,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431081596] [2021-07-09 17:30:54,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:54,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:54,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:54,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:54,664 INFO L87 Difference]: Start difference. First operand 92 states and 199 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:54,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:54,780 INFO L93 Difference]: Finished difference Result 129 states and 261 transitions. [2021-07-09 17:30:54,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:54,780 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:54,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:54,780 INFO L225 Difference]: With dead ends: 129 [2021-07-09 17:30:54,780 INFO L226 Difference]: Without dead ends: 126 [2021-07-09 17:30:54,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:54,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-09 17:30:54,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 97. [2021-07-09 17:30:54,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1875) internal successors, (210), 96 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:54,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 210 transitions. [2021-07-09 17:30:54,782 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 210 transitions. Word has length 17 [2021-07-09 17:30:54,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:54,782 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 210 transitions. [2021-07-09 17:30:54,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:54,782 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 210 transitions. [2021-07-09 17:30:54,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:54,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:54,782 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:54,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-07-09 17:30:54,993 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:54,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:54,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1712089544, now seen corresponding path program 144 times [2021-07-09 17:30:54,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:54,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173749386] [2021-07-09 17:30:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:55,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:55,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173749386] [2021-07-09 17:30:55,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173749386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:55,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637729614] [2021-07-09 17:30:55,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:55,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:30:55,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:55,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:30:55,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:55,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:55,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:55,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:55,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:55,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:55,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:55,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:55,216 INFO L628 ElimStorePlain]: treesize reduction 86, result has 34.4 percent of original size [2021-07-09 17:30:55,217 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:55,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:30:55,219 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:55,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:55,235 INFO L518 ElimStorePlain]: Eliminatee v_prenex_115 vanished before elimination [2021-07-09 17:30:55,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:55,236 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-07-09 17:30:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:55,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637729614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:55,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:55,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:30:55,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231669346] [2021-07-09 17:30:55,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:55,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:55,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:55,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:55,271 INFO L87 Difference]: Start difference. First operand 97 states and 210 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:55,370 INFO L93 Difference]: Finished difference Result 125 states and 258 transitions. [2021-07-09 17:30:55,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:55,370 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:55,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:55,371 INFO L225 Difference]: With dead ends: 125 [2021-07-09 17:30:55,371 INFO L226 Difference]: Without dead ends: 125 [2021-07-09 17:30:55,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 135.0ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:55,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-07-09 17:30:55,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2021-07-09 17:30:55,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1875) internal successors, (210), 96 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 210 transitions. [2021-07-09 17:30:55,372 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 210 transitions. Word has length 17 [2021-07-09 17:30:55,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:55,372 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 210 transitions. [2021-07-09 17:30:55,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,372 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 210 transitions. [2021-07-09 17:30:55,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:55,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:55,373 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:55,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable863 [2021-07-09 17:30:55,573 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:55,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:55,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1002041774, now seen corresponding path program 145 times [2021-07-09 17:30:55,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:55,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103344640] [2021-07-09 17:30:55,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:55,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:55,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103344640] [2021-07-09 17:30:55,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103344640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:55,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935372989] [2021-07-09 17:30:55,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:55,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:55,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:55,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935372989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:55,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:55,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:55,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596954833] [2021-07-09 17:30:55,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:55,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:55,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:55,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:55,769 INFO L87 Difference]: Start difference. First operand 97 states and 210 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:55,905 INFO L93 Difference]: Finished difference Result 134 states and 273 transitions. [2021-07-09 17:30:55,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:55,905 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:55,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:55,906 INFO L225 Difference]: With dead ends: 134 [2021-07-09 17:30:55,906 INFO L226 Difference]: Without dead ends: 134 [2021-07-09 17:30:55,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:55,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-09 17:30:55,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2021-07-09 17:30:55,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1894736842105265) internal successors, (208), 95 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 208 transitions. [2021-07-09 17:30:55,907 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 208 transitions. Word has length 17 [2021-07-09 17:30:55,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:55,907 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 208 transitions. [2021-07-09 17:30:55,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,907 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 208 transitions. [2021-07-09 17:30:55,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:55,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:55,908 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:56,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:56,108 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:56,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:56,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1059873528, now seen corresponding path program 146 times [2021-07-09 17:30:56,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:56,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685573609] [2021-07-09 17:30:56,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:56,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:56,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685573609] [2021-07-09 17:30:56,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685573609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:56,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609790150] [2021-07-09 17:30:56,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:56,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:56,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:56,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:30:56,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:56,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609790150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:56,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:56,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:56,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786075235] [2021-07-09 17:30:56,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:56,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:56,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:56,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:56,291 INFO L87 Difference]: Start difference. First operand 96 states and 208 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:56,409 INFO L93 Difference]: Finished difference Result 100 states and 212 transitions. [2021-07-09 17:30:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:56,409 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:56,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:56,409 INFO L225 Difference]: With dead ends: 100 [2021-07-09 17:30:56,409 INFO L226 Difference]: Without dead ends: 96 [2021-07-09 17:30:56,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:56,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-09 17:30:56,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-07-09 17:30:56,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1789473684210527) internal successors, (207), 95 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 207 transitions. [2021-07-09 17:30:56,410 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 207 transitions. Word has length 17 [2021-07-09 17:30:56,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:56,411 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 207 transitions. [2021-07-09 17:30:56,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,411 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 207 transitions. [2021-07-09 17:30:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:56,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:56,411 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:56,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:56,611 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:56,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:56,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1146754762, now seen corresponding path program 147 times [2021-07-09 17:30:56,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:56,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940167957] [2021-07-09 17:30:56,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:56,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:56,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940167957] [2021-07-09 17:30:56,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940167957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:56,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54542412] [2021-07-09 17:30:56,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:56,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:56,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:56,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:56,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:56,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54542412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:56,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:56,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:56,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028164436] [2021-07-09 17:30:56,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:56,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:56,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:56,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:56,782 INFO L87 Difference]: Start difference. First operand 96 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:56,881 INFO L93 Difference]: Finished difference Result 108 states and 228 transitions. [2021-07-09 17:30:56,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:56,882 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:56,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:56,882 INFO L225 Difference]: With dead ends: 108 [2021-07-09 17:30:56,882 INFO L226 Difference]: Without dead ends: 108 [2021-07-09 17:30:56,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:56,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-07-09 17:30:56,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2021-07-09 17:30:56,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1724137931034484) internal successors, (189), 87 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 189 transitions. [2021-07-09 17:30:56,883 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 189 transitions. Word has length 17 [2021-07-09 17:30:56,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:56,883 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 189 transitions. [2021-07-09 17:30:56,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,883 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 189 transitions. [2021-07-09 17:30:56,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:56,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:56,884 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:57,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-07-09 17:30:57,097 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:57,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:57,097 INFO L82 PathProgramCache]: Analyzing trace with hash -935331810, now seen corresponding path program 148 times [2021-07-09 17:30:57,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:57,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721519552] [2021-07-09 17:30:57,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:57,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:57,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721519552] [2021-07-09 17:30:57,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721519552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:57,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089160999] [2021-07-09 17:30:57,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:57,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:57,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:57,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:57,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:57,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:57,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:57,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,277 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:30:57,277 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:57,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,278 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:30:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:57,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089160999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:57,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:57,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:30:57,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653426484] [2021-07-09 17:30:57,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:57,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:57,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:57,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:57,290 INFO L87 Difference]: Start difference. First operand 88 states and 189 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:57,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:57,396 INFO L93 Difference]: Finished difference Result 107 states and 227 transitions. [2021-07-09 17:30:57,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:57,396 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:57,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:57,396 INFO L225 Difference]: With dead ends: 107 [2021-07-09 17:30:57,396 INFO L226 Difference]: Without dead ends: 107 [2021-07-09 17:30:57,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:57,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-07-09 17:30:57,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 88. [2021-07-09 17:30:57,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1724137931034484) internal successors, (189), 87 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 189 transitions. [2021-07-09 17:30:57,398 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 189 transitions. Word has length 17 [2021-07-09 17:30:57,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:57,398 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 189 transitions. [2021-07-09 17:30:57,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:57,398 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 189 transitions. [2021-07-09 17:30:57,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:57,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:57,398 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:57,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable887 [2021-07-09 17:30:57,613 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:57,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:57,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1721385830, now seen corresponding path program 149 times [2021-07-09 17:30:57,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:57,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978451213] [2021-07-09 17:30:57,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:57,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:57,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978451213] [2021-07-09 17:30:57,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978451213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:57,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690805121] [2021-07-09 17:30:57,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:30:57,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:30:57,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:57,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:57,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:57,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690805121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:57,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:57,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:57,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512137802] [2021-07-09 17:30:57,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:57,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:57,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:57,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:57,820 INFO L87 Difference]: Start difference. First operand 88 states and 189 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:58,031 INFO L93 Difference]: Finished difference Result 113 states and 230 transitions. [2021-07-09 17:30:58,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:58,032 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:58,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:58,032 INFO L225 Difference]: With dead ends: 113 [2021-07-09 17:30:58,032 INFO L226 Difference]: Without dead ends: 110 [2021-07-09 17:30:58,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 206.6ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-07-09 17:30:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2021-07-09 17:30:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1739130434782608) internal successors, (200), 92 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 200 transitions. [2021-07-09 17:30:58,033 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 200 transitions. Word has length 17 [2021-07-09 17:30:58,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:58,033 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 200 transitions. [2021-07-09 17:30:58,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,033 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 200 transitions. [2021-07-09 17:30:58,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:58,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:58,034 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:58,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable891 [2021-07-09 17:30:58,234 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:58,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:58,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1945317298, now seen corresponding path program 150 times [2021-07-09 17:30:58,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:58,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983630059] [2021-07-09 17:30:58,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:58,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:58,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983630059] [2021-07-09 17:30:58,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983630059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:58,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757138274] [2021-07-09 17:30:58,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:58,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:30:58,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:58,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:58,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:58,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:58,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:58,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:58,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:58,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:58,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:58,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:58,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:58,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:58,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:58,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:58,408 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:58,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:58,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:30:58,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:58,445 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:30:58,445 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:30:58,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:58,446 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:30:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:58,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757138274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:58,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:58,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:30:58,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192950251] [2021-07-09 17:30:58,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:58,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:58,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:58,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:58,477 INFO L87 Difference]: Start difference. First operand 93 states and 200 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:58,603 INFO L93 Difference]: Finished difference Result 126 states and 266 transitions. [2021-07-09 17:30:58,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:58,603 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:58,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:58,603 INFO L225 Difference]: With dead ends: 126 [2021-07-09 17:30:58,604 INFO L226 Difference]: Without dead ends: 126 [2021-07-09 17:30:58,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 153.4ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:58,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-09 17:30:58,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 93. [2021-07-09 17:30:58,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1739130434782608) internal successors, (200), 92 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 200 transitions. [2021-07-09 17:30:58,605 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 200 transitions. Word has length 17 [2021-07-09 17:30:58,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:58,605 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 200 transitions. [2021-07-09 17:30:58,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,605 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 200 transitions. [2021-07-09 17:30:58,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:58,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:58,605 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:58,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable903,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:58,806 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:58,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:58,806 INFO L82 PathProgramCache]: Analyzing trace with hash -585200558, now seen corresponding path program 151 times [2021-07-09 17:30:58,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:58,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180782120] [2021-07-09 17:30:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:58,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:58,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180782120] [2021-07-09 17:30:58,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180782120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:58,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393020682] [2021-07-09 17:30:58,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:58,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:58,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:58,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393020682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:58,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:58,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:58,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542233439] [2021-07-09 17:30:58,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:58,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:58,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:58,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:58,993 INFO L87 Difference]: Start difference. First operand 93 states and 200 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:59,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:59,142 INFO L93 Difference]: Finished difference Result 98 states and 209 transitions. [2021-07-09 17:30:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:59,142 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:59,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:59,142 INFO L225 Difference]: With dead ends: 98 [2021-07-09 17:30:59,142 INFO L226 Difference]: Without dead ends: 98 [2021-07-09 17:30:59,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:59,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-09 17:30:59,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2021-07-09 17:30:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.1744186046511627) internal successors, (187), 86 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:59,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 187 transitions. [2021-07-09 17:30:59,143 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 187 transitions. Word has length 17 [2021-07-09 17:30:59,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:59,144 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 187 transitions. [2021-07-09 17:30:59,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:59,144 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 187 transitions. [2021-07-09 17:30:59,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:59,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:59,144 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:59,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable913 [2021-07-09 17:30:59,344 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:59,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:59,345 INFO L82 PathProgramCache]: Analyzing trace with hash 466797346, now seen corresponding path program 152 times [2021-07-09 17:30:59,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:59,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300163320] [2021-07-09 17:30:59,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:59,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:59,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300163320] [2021-07-09 17:30:59,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300163320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:59,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571010898] [2021-07-09 17:30:59,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:59,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:59,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:59,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:59,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:59,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571010898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:59,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:59,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:30:59,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290429415] [2021-07-09 17:30:59,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:59,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:59,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:59,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:59,533 INFO L87 Difference]: Start difference. First operand 87 states and 187 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:59,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:59,697 INFO L93 Difference]: Finished difference Result 125 states and 252 transitions. [2021-07-09 17:30:59,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:59,697 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:59,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:59,698 INFO L225 Difference]: With dead ends: 125 [2021-07-09 17:30:59,698 INFO L226 Difference]: Without dead ends: 122 [2021-07-09 17:30:59,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 202.4ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:59,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-07-09 17:30:59,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 94. [2021-07-09 17:30:59,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:59,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-07-09 17:30:59,699 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-07-09 17:30:59,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:59,699 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-07-09 17:30:59,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:59,699 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-07-09 17:30:59,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:59,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:59,699 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:59,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable923,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:59,900 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:59,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:59,900 INFO L82 PathProgramCache]: Analyzing trace with hash 242865878, now seen corresponding path program 153 times [2021-07-09 17:30:59,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:59,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565953395] [2021-07-09 17:30:59,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:59,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:59,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565953395] [2021-07-09 17:30:59,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565953395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:59,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815199411] [2021-07-09 17:30:59,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:59,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:30:59,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:59,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:30:59,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:00,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:00,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:00,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:00,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:00,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:00,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:31:00,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:00,115 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:31:00,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:31:00,118 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:00,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:00,129 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:31:00,130 INFO L518 ElimStorePlain]: Eliminatee v_prenex_117 vanished before elimination [2021-07-09 17:31:00,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:00,130 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:31:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:00,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815199411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:00,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:00,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:31:00,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410554007] [2021-07-09 17:31:00,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:00,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:00,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:00,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:00,163 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:00,368 INFO L93 Difference]: Finished difference Result 118 states and 243 transitions. [2021-07-09 17:31:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:00,368 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:00,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:00,368 INFO L225 Difference]: With dead ends: 118 [2021-07-09 17:31:00,368 INFO L226 Difference]: Without dead ends: 118 [2021-07-09 17:31:00,369 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 242.5ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:00,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-07-09 17:31:00,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2021-07-09 17:31:00,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-07-09 17:31:00,370 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-07-09 17:31:00,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:00,370 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-07-09 17:31:00,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,370 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-07-09 17:31:00,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:00,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:00,370 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:00,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable934,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:00,571 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:00,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:00,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1602982618, now seen corresponding path program 154 times [2021-07-09 17:31:00,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:00,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527969068] [2021-07-09 17:31:00,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:00,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:00,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527969068] [2021-07-09 17:31:00,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527969068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:00,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148345832] [2021-07-09 17:31:00,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:00,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:00,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:00,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:00,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:00,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148345832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:00,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:00,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:31:00,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437851122] [2021-07-09 17:31:00,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:00,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:00,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:00,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:00,785 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:00,974 INFO L93 Difference]: Finished difference Result 128 states and 261 transitions. [2021-07-09 17:31:00,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:00,974 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:00,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:00,974 INFO L225 Difference]: With dead ends: 128 [2021-07-09 17:31:00,974 INFO L226 Difference]: Without dead ends: 128 [2021-07-09 17:31:00,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:00,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-07-09 17:31:00,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2021-07-09 17:31:00,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1956521739130435) internal successors, (202), 92 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 202 transitions. [2021-07-09 17:31:00,976 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 202 transitions. Word has length 17 [2021-07-09 17:31:00,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:00,976 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 202 transitions. [2021-07-09 17:31:00,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,976 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 202 transitions. [2021-07-09 17:31:00,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:00,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:00,976 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:01,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-07-09 17:31:01,177 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:01,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:01,177 INFO L82 PathProgramCache]: Analyzing trace with hash -630069376, now seen corresponding path program 155 times [2021-07-09 17:31:01,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:01,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740185570] [2021-07-09 17:31:01,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:01,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:01,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740185570] [2021-07-09 17:31:01,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740185570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:01,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632431104] [2021-07-09 17:31:01,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:01,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:01,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:01,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:01,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:01,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632431104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:01,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:01,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:31:01,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054861307] [2021-07-09 17:31:01,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:01,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:01,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:01,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:01,358 INFO L87 Difference]: Start difference. First operand 93 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:01,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:01,556 INFO L93 Difference]: Finished difference Result 97 states and 206 transitions. [2021-07-09 17:31:01,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:01,556 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:01,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:01,556 INFO L225 Difference]: With dead ends: 97 [2021-07-09 17:31:01,556 INFO L226 Difference]: Without dead ends: 93 [2021-07-09 17:31:01,557 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 232.3ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:01,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-09 17:31:01,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-07-09 17:31:01,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1847826086956523) internal successors, (201), 92 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:01,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 201 transitions. [2021-07-09 17:31:01,558 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 201 transitions. Word has length 17 [2021-07-09 17:31:01,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:01,558 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 201 transitions. [2021-07-09 17:31:01,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:01,558 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 201 transitions. [2021-07-09 17:31:01,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:01,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:01,558 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:01,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable953,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:01,759 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:01,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:01,759 INFO L82 PathProgramCache]: Analyzing trace with hash -543188142, now seen corresponding path program 156 times [2021-07-09 17:31:01,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:01,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27041523] [2021-07-09 17:31:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:01,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:01,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27041523] [2021-07-09 17:31:01,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27041523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:01,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120393933] [2021-07-09 17:31:01,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:01,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:31:01,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:01,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:01,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:01,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120393933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:01,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:01,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:31:01,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007498358] [2021-07-09 17:31:01,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:01,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:01,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:01,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:01,926 INFO L87 Difference]: Start difference. First operand 93 states and 201 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:02,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:02,036 INFO L93 Difference]: Finished difference Result 105 states and 222 transitions. [2021-07-09 17:31:02,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:02,037 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:02,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:02,037 INFO L225 Difference]: With dead ends: 105 [2021-07-09 17:31:02,037 INFO L226 Difference]: Without dead ends: 105 [2021-07-09 17:31:02,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:02,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-09 17:31:02,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2021-07-09 17:31:02,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.176470588235294) internal successors, (185), 85 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:02,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 185 transitions. [2021-07-09 17:31:02,038 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 185 transitions. Word has length 17 [2021-07-09 17:31:02,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:02,038 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 185 transitions. [2021-07-09 17:31:02,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:02,038 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 185 transitions. [2021-07-09 17:31:02,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:02,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:02,039 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:02,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable959,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:02,241 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:02,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:02,241 INFO L82 PathProgramCache]: Analyzing trace with hash -419000934, now seen corresponding path program 157 times [2021-07-09 17:31:02,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:02,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882361105] [2021-07-09 17:31:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:02,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:02,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882361105] [2021-07-09 17:31:02,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882361105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:02,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124053183] [2021-07-09 17:31:02,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:02,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:02,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:02,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124053183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:02,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:02,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:31:02,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117254725] [2021-07-09 17:31:02,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:02,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:02,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:02,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:02,469 INFO L87 Difference]: Start difference. First operand 86 states and 185 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:02,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:02,746 INFO L93 Difference]: Finished difference Result 123 states and 249 transitions. [2021-07-09 17:31:02,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:02,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:02,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:02,746 INFO L225 Difference]: With dead ends: 123 [2021-07-09 17:31:02,746 INFO L226 Difference]: Without dead ends: 120 [2021-07-09 17:31:02,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 291.5ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:02,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-09 17:31:02,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2021-07-09 17:31:02,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.21505376344086) internal successors, (206), 93 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:02,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 206 transitions. [2021-07-09 17:31:02,748 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 206 transitions. Word has length 17 [2021-07-09 17:31:02,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:02,748 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 206 transitions. [2021-07-09 17:31:02,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:02,748 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 206 transitions. [2021-07-09 17:31:02,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:02,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:02,748 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:02,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable963 [2021-07-09 17:31:02,949 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:02,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:02,949 INFO L82 PathProgramCache]: Analyzing trace with hash -642932402, now seen corresponding path program 158 times [2021-07-09 17:31:02,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:02,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689378842] [2021-07-09 17:31:02,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:03,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:03,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689378842] [2021-07-09 17:31:03,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689378842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:03,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755700255] [2021-07-09 17:31:03,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:03,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:03,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:03,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:03,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:03,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:03,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:03,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:31:03,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:03,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:03,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:03,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:03,196 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:31:03,197 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:31:03,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:31:03,199 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:03,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:03,210 INFO L518 ElimStorePlain]: Eliminatee v_prenex_123 vanished before elimination [2021-07-09 17:31:03,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:03,211 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:31:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:03,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755700255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:03,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:03,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:31:03,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505911064] [2021-07-09 17:31:03,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:03,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:03,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:03,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:03,236 INFO L87 Difference]: Start difference. First operand 94 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:03,483 INFO L93 Difference]: Finished difference Result 121 states and 250 transitions. [2021-07-09 17:31:03,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:03,483 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:03,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:03,483 INFO L225 Difference]: With dead ends: 121 [2021-07-09 17:31:03,483 INFO L226 Difference]: Without dead ends: 121 [2021-07-09 17:31:03,484 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 266.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:03,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-09 17:31:03,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 94. [2021-07-09 17:31:03,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.21505376344086) internal successors, (206), 93 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 206 transitions. [2021-07-09 17:31:03,485 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 206 transitions. Word has length 17 [2021-07-09 17:31:03,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:03,485 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 206 transitions. [2021-07-09 17:31:03,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,485 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 206 transitions. [2021-07-09 17:31:03,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:03,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:03,485 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:03,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable976 [2021-07-09 17:31:03,689 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:03,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:03,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2053723234, now seen corresponding path program 159 times [2021-07-09 17:31:03,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:03,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520707439] [2021-07-09 17:31:03,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:03,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:03,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520707439] [2021-07-09 17:31:03,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520707439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:03,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744725033] [2021-07-09 17:31:03,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:03,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:31:03,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:03,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:03,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:03,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:03,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:03,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:31:03,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:03,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:03,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:03,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:03,930 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:31:03,930 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:31:03,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:31:03,933 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:03,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:03,944 INFO L518 ElimStorePlain]: Eliminatee v_prenex_126 vanished before elimination [2021-07-09 17:31:03,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:03,945 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:31:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:03,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744725033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:03,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:03,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:31:03,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494010911] [2021-07-09 17:31:03,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:03,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:03,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:03,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:03,970 INFO L87 Difference]: Start difference. First operand 94 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:04,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:04,256 INFO L93 Difference]: Finished difference Result 123 states and 251 transitions. [2021-07-09 17:31:04,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:31:04,256 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:04,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:04,256 INFO L225 Difference]: With dead ends: 123 [2021-07-09 17:31:04,256 INFO L226 Difference]: Without dead ends: 121 [2021-07-09 17:31:04,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 304.5ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:04,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-09 17:31:04,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 94. [2021-07-09 17:31:04,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-07-09 17:31:04,258 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 17 [2021-07-09 17:31:04,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:04,258 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-07-09 17:31:04,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:04,258 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-07-09 17:31:04,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:04,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:04,258 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:04,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-07-09 17:31:04,458 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:04,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:04,459 INFO L82 PathProgramCache]: Analyzing trace with hash 717184338, now seen corresponding path program 160 times [2021-07-09 17:31:04,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:04,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643791103] [2021-07-09 17:31:04,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:04,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:04,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643791103] [2021-07-09 17:31:04,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643791103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:04,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355639773] [2021-07-09 17:31:04,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:04,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:04,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:04,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:04,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:04,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355639773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:04,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:04,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:31:04,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11954396] [2021-07-09 17:31:04,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:04,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:04,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:04,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:04,670 INFO L87 Difference]: Start difference. First operand 94 states and 205 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:04,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:04,979 INFO L93 Difference]: Finished difference Result 126 states and 257 transitions. [2021-07-09 17:31:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:04,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:04,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:04,979 INFO L225 Difference]: With dead ends: 126 [2021-07-09 17:31:04,979 INFO L226 Difference]: Without dead ends: 126 [2021-07-09 17:31:04,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 296.8ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:04,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-09 17:31:04,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 93. [2021-07-09 17:31:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.2065217391304346) internal successors, (203), 92 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:04,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 203 transitions. [2021-07-09 17:31:04,981 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 203 transitions. Word has length 17 [2021-07-09 17:31:04,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:04,981 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 203 transitions. [2021-07-09 17:31:04,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:04,981 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 203 transitions. [2021-07-09 17:31:04,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:04,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:04,981 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:05,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable991 [2021-07-09 17:31:05,181 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:05,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:05,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1515867656, now seen corresponding path program 161 times [2021-07-09 17:31:05,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:05,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717944783] [2021-07-09 17:31:05,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:05,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:05,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717944783] [2021-07-09 17:31:05,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717944783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:05,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396114537] [2021-07-09 17:31:05,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:05,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:05,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:05,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:05,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:05,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396114537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:05,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:05,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:31:05,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262232477] [2021-07-09 17:31:05,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:05,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:05,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:05,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:05,392 INFO L87 Difference]: Start difference. First operand 93 states and 203 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:05,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:05,668 INFO L93 Difference]: Finished difference Result 101 states and 213 transitions. [2021-07-09 17:31:05,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:05,669 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:05,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:05,669 INFO L225 Difference]: With dead ends: 101 [2021-07-09 17:31:05,669 INFO L226 Difference]: Without dead ends: 97 [2021-07-09 17:31:05,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 310.7ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:05,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-09 17:31:05,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2021-07-09 17:31:05,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1956521739130435) internal successors, (202), 92 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:05,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 202 transitions. [2021-07-09 17:31:05,670 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 202 transitions. Word has length 17 [2021-07-09 17:31:05,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:05,670 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 202 transitions. [2021-07-09 17:31:05,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:05,670 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 202 transitions. [2021-07-09 17:31:05,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:05,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:05,671 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:05,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1001 [2021-07-09 17:31:05,871 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:05,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:05,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1428986422, now seen corresponding path program 162 times [2021-07-09 17:31:05,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:05,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891358279] [2021-07-09 17:31:05,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:05,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:05,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891358279] [2021-07-09 17:31:05,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891358279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:05,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398873686] [2021-07-09 17:31:05,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:05,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:31:05,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:05,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:31:05,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:06,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:06,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:06,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:06,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:06,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:06,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:06,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:06,087 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:31:06,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:06,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:31:06,090 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:06,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:06,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:06,095 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:31:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:06,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398873686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:06,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:06,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:31:06,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120232681] [2021-07-09 17:31:06,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:06,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:06,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:06,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:06,112 INFO L87 Difference]: Start difference. First operand 93 states and 202 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:06,347 INFO L93 Difference]: Finished difference Result 113 states and 238 transitions. [2021-07-09 17:31:06,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:31:06,347 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:06,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:06,347 INFO L225 Difference]: With dead ends: 113 [2021-07-09 17:31:06,347 INFO L226 Difference]: Without dead ends: 113 [2021-07-09 17:31:06,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 264.4ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:06,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-07-09 17:31:06,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2021-07-09 17:31:06,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.197802197802198) internal successors, (200), 91 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 200 transitions. [2021-07-09 17:31:06,349 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 200 transitions. Word has length 17 [2021-07-09 17:31:06,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:06,349 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 200 transitions. [2021-07-09 17:31:06,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,349 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 200 transitions. [2021-07-09 17:31:06,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:06,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:06,349 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:06,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1006,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:06,549 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:06,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:06,550 INFO L82 PathProgramCache]: Analyzing trace with hash -2022213922, now seen corresponding path program 163 times [2021-07-09 17:31:06,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:06,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704543714] [2021-07-09 17:31:06,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:06,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:06,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704543714] [2021-07-09 17:31:06,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704543714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:06,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259212642] [2021-07-09 17:31:06,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:06,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:06,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:06,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259212642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:06,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:06,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:31:06,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446616317] [2021-07-09 17:31:06,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:06,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:06,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:06,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:06,737 INFO L87 Difference]: Start difference. First operand 92 states and 200 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:06,955 INFO L93 Difference]: Finished difference Result 98 states and 207 transitions. [2021-07-09 17:31:06,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:06,956 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:06,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:06,956 INFO L225 Difference]: With dead ends: 98 [2021-07-09 17:31:06,956 INFO L226 Difference]: Without dead ends: 92 [2021-07-09 17:31:06,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 245.8ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:06,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-09 17:31:06,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-07-09 17:31:06,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1868131868131866) internal successors, (199), 91 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 199 transitions. [2021-07-09 17:31:06,957 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 199 transitions. Word has length 17 [2021-07-09 17:31:06,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:06,957 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 199 transitions. [2021-07-09 17:31:06,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,957 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 199 transitions. [2021-07-09 17:31:06,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:06,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:06,958 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:07,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1008 [2021-07-09 17:31:07,158 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:07,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:07,158 INFO L82 PathProgramCache]: Analyzing trace with hash 759196754, now seen corresponding path program 164 times [2021-07-09 17:31:07,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:07,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997291436] [2021-07-09 17:31:07,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:07,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:07,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997291436] [2021-07-09 17:31:07,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997291436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:07,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261348293] [2021-07-09 17:31:07,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:07,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:07,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:07,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:07,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:07,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261348293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:07,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:07,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:31:07,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287004737] [2021-07-09 17:31:07,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:07,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:07,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:07,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:07,336 INFO L87 Difference]: Start difference. First operand 92 states and 199 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:07,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:07,400 INFO L93 Difference]: Finished difference Result 101 states and 214 transitions. [2021-07-09 17:31:07,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:07,400 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:07,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:07,401 INFO L225 Difference]: With dead ends: 101 [2021-07-09 17:31:07,401 INFO L226 Difference]: Without dead ends: 101 [2021-07-09 17:31:07,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:07,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-07-09 17:31:07,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2021-07-09 17:31:07,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1707317073170733) internal successors, (178), 82 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:07,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 178 transitions. [2021-07-09 17:31:07,402 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 178 transitions. Word has length 17 [2021-07-09 17:31:07,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:07,402 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 178 transitions. [2021-07-09 17:31:07,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:07,402 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 178 transitions. [2021-07-09 17:31:07,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:07,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:07,402 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:07,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1013 [2021-07-09 17:31:07,603 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:07,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:07,603 INFO L82 PathProgramCache]: Analyzing trace with hash 438642694, now seen corresponding path program 165 times [2021-07-09 17:31:07,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:07,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815051650] [2021-07-09 17:31:07,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:07,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:07,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815051650] [2021-07-09 17:31:07,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815051650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:07,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80567496] [2021-07-09 17:31:07,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:07,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:31:07,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:07,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:07,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:07,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80567496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:07,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:07,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:31:07,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436086327] [2021-07-09 17:31:07,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:07,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:07,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:07,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:07,766 INFO L87 Difference]: Start difference. First operand 83 states and 178 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:07,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:07,951 INFO L93 Difference]: Finished difference Result 98 states and 203 transitions. [2021-07-09 17:31:07,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:31:07,952 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:07,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:07,952 INFO L225 Difference]: With dead ends: 98 [2021-07-09 17:31:07,952 INFO L226 Difference]: Without dead ends: 92 [2021-07-09 17:31:07,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:07,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-09 17:31:07,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2021-07-09 17:31:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.158536585365854) internal successors, (177), 82 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:07,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 177 transitions. [2021-07-09 17:31:07,953 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 177 transitions. Word has length 17 [2021-07-09 17:31:07,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:07,953 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 177 transitions. [2021-07-09 17:31:07,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:07,953 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 177 transitions. [2021-07-09 17:31:07,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:07,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:07,954 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:08,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1017,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:08,154 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:08,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:08,155 INFO L82 PathProgramCache]: Analyzing trace with hash 2086701778, now seen corresponding path program 166 times [2021-07-09 17:31:08,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:08,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878775325] [2021-07-09 17:31:08,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:08,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:08,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878775325] [2021-07-09 17:31:08,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878775325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:08,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93311782] [2021-07-09 17:31:08,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:08,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:08,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:08,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:08,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:08,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:08,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:08,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:31:08,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:08,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:08,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,339 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:31:08,339 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:31:08,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,339 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:31:08,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:08,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93311782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:08,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:08,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:31:08,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581275119] [2021-07-09 17:31:08,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:08,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:08,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:08,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:08,352 INFO L87 Difference]: Start difference. First operand 83 states and 177 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:08,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:08,483 INFO L93 Difference]: Finished difference Result 114 states and 239 transitions. [2021-07-09 17:31:08,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:08,483 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:08,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:08,483 INFO L225 Difference]: With dead ends: 114 [2021-07-09 17:31:08,483 INFO L226 Difference]: Without dead ends: 114 [2021-07-09 17:31:08,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:08,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-07-09 17:31:08,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 83. [2021-07-09 17:31:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.158536585365854) internal successors, (177), 82 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 177 transitions. [2021-07-09 17:31:08,484 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 177 transitions. Word has length 17 [2021-07-09 17:31:08,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:08,485 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 177 transitions. [2021-07-09 17:31:08,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:08,485 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 177 transitions. [2021-07-09 17:31:08,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:08,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:08,485 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:08,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1021,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:08,697 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:08,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:08,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1300647758, now seen corresponding path program 167 times [2021-07-09 17:31:08,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:08,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086161314] [2021-07-09 17:31:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:08,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:08,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086161314] [2021-07-09 17:31:08,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086161314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:08,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752400269] [2021-07-09 17:31:08,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:08,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:31:08,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:08,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:08,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:08,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752400269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:08,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:08,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:31:08,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704122590] [2021-07-09 17:31:08,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:08,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:08,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:08,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:08,886 INFO L87 Difference]: Start difference. First operand 83 states and 177 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:09,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:09,123 INFO L93 Difference]: Finished difference Result 118 states and 238 transitions. [2021-07-09 17:31:09,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:09,123 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:09,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:09,124 INFO L225 Difference]: With dead ends: 118 [2021-07-09 17:31:09,124 INFO L226 Difference]: Without dead ends: 115 [2021-07-09 17:31:09,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:09,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-07-09 17:31:09,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 88. [2021-07-09 17:31:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1724137931034484) internal successors, (189), 87 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:09,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 189 transitions. [2021-07-09 17:31:09,125 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 189 transitions. Word has length 17 [2021-07-09 17:31:09,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:09,125 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 189 transitions. [2021-07-09 17:31:09,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:09,125 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 189 transitions. [2021-07-09 17:31:09,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:09,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:09,125 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:09,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1025,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:09,326 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:09,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:09,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1076716290, now seen corresponding path program 168 times [2021-07-09 17:31:09,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:09,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633452086] [2021-07-09 17:31:09,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:09,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:09,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633452086] [2021-07-09 17:31:09,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633452086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:09,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911115212] [2021-07-09 17:31:09,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:09,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:31:09,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:09,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:09,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:09,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:09,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:31:09,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:09,494 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:31:09,497 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,526 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:31:09,526 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:31:09,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:09,527 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:31:09,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:09,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911115212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:09,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:09,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:31:09,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499081361] [2021-07-09 17:31:09,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:09,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:09,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:09,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:09,558 INFO L87 Difference]: Start difference. First operand 88 states and 189 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:09,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:09,826 INFO L93 Difference]: Finished difference Result 139 states and 283 transitions. [2021-07-09 17:31:09,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:09,827 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:09,827 INFO L225 Difference]: With dead ends: 139 [2021-07-09 17:31:09,827 INFO L226 Difference]: Without dead ends: 139 [2021-07-09 17:31:09,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 246.7ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:09,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-07-09 17:31:09,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 88. [2021-07-09 17:31:09,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1724137931034484) internal successors, (189), 87 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:09,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 189 transitions. [2021-07-09 17:31:09,828 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 189 transitions. Word has length 17 [2021-07-09 17:31:09,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:09,829 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 189 transitions. [2021-07-09 17:31:09,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 189 transitions. [2021-07-09 17:31:09,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:09,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:09,829 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:10,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-07-09 17:31:10,029 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:10,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:10,030 INFO L82 PathProgramCache]: Analyzing trace with hash -334074542, now seen corresponding path program 169 times [2021-07-09 17:31:10,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:10,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508036171] [2021-07-09 17:31:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:10,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:10,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508036171] [2021-07-09 17:31:10,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508036171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:10,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117994941] [2021-07-09 17:31:10,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:10,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:10,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:10,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:10,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:10,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:31:10,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:10,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:10,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:10,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:10,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:10,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:10,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:10,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:31:10,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:10,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:10,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:10,210 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:10,239 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:31:10,239 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:31:10,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:10,240 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:31:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:10,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117994941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:10,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:10,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:31:10,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68934558] [2021-07-09 17:31:10,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:10,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:10,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:10,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:10,263 INFO L87 Difference]: Start difference. First operand 88 states and 189 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:10,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:10,468 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2021-07-09 17:31:10,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:10,469 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:10,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:10,469 INFO L225 Difference]: With dead ends: 115 [2021-07-09 17:31:10,469 INFO L226 Difference]: Without dead ends: 113 [2021-07-09 17:31:10,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 190.7ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:10,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-07-09 17:31:10,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 88. [2021-07-09 17:31:10,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.160919540229885) internal successors, (188), 87 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:10,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 188 transitions. [2021-07-09 17:31:10,470 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 188 transitions. Word has length 17 [2021-07-09 17:31:10,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:10,471 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 188 transitions. [2021-07-09 17:31:10,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:10,471 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 188 transitions. [2021-07-09 17:31:10,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:10,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:10,471 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:10,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1047 [2021-07-09 17:31:10,671 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:10,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:10,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1858134266, now seen corresponding path program 170 times [2021-07-09 17:31:10,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:10,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426588942] [2021-07-09 17:31:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:10,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:10,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:10,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426588942] [2021-07-09 17:31:10,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426588942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:10,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102638746] [2021-07-09 17:31:10,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:10,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:10,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:10,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:31:10,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:10,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:10,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:10,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:10,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:10,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:10,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:10,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:10,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:10,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:10,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:10,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:10,839 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:10,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:10,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:10,842 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:10,878 INFO L628 ElimStorePlain]: treesize reduction 65, result has 38.1 percent of original size [2021-07-09 17:31:10,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:10,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:31:10,881 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:10,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:10,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:10,897 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-07-09 17:31:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:10,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102638746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:10,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:10,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:31:10,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818775089] [2021-07-09 17:31:10,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:10,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:10,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:10,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:10,931 INFO L87 Difference]: Start difference. First operand 88 states and 188 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:11,053 INFO L93 Difference]: Finished difference Result 101 states and 213 transitions. [2021-07-09 17:31:11,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:11,053 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:11,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:11,053 INFO L225 Difference]: With dead ends: 101 [2021-07-09 17:31:11,053 INFO L226 Difference]: Without dead ends: 101 [2021-07-09 17:31:11,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:11,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-07-09 17:31:11,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 82. [2021-07-09 17:31:11,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 81 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 175 transitions. [2021-07-09 17:31:11,054 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 175 transitions. Word has length 17 [2021-07-09 17:31:11,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:11,054 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 175 transitions. [2021-07-09 17:31:11,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,055 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 175 transitions. [2021-07-09 17:31:11,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:11,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:11,055 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:11,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1058 [2021-07-09 17:31:11,255 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:11,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:11,255 INFO L82 PathProgramCache]: Analyzing trace with hash -806136362, now seen corresponding path program 171 times [2021-07-09 17:31:11,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:11,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408881760] [2021-07-09 17:31:11,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:11,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:11,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408881760] [2021-07-09 17:31:11,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408881760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:11,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393849710] [2021-07-09 17:31:11,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:11,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:31:11,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:11,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:11,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:11,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393849710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:11,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:11,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:31:11,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951460641] [2021-07-09 17:31:11,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:11,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:11,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:11,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:11,453 INFO L87 Difference]: Start difference. First operand 82 states and 175 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:11,661 INFO L93 Difference]: Finished difference Result 126 states and 251 transitions. [2021-07-09 17:31:11,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:11,661 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:11,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:11,662 INFO L225 Difference]: With dead ends: 126 [2021-07-09 17:31:11,662 INFO L226 Difference]: Without dead ends: 123 [2021-07-09 17:31:11,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:11,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-09 17:31:11,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2021-07-09 17:31:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.1627906976744184) internal successors, (186), 86 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 186 transitions. [2021-07-09 17:31:11,663 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 186 transitions. Word has length 17 [2021-07-09 17:31:11,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:11,663 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 186 transitions. [2021-07-09 17:31:11,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 186 transitions. [2021-07-09 17:31:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:11,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:11,663 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:11,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:11,864 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:11,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:11,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1030067830, now seen corresponding path program 172 times [2021-07-09 17:31:11,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:11,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889832236] [2021-07-09 17:31:11,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:11,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:11,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889832236] [2021-07-09 17:31:11,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889832236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:11,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597602450] [2021-07-09 17:31:11,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:11,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:11,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:11,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:11,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:12,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:12,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:31:12,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,065 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:31:12,065 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:31:12,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:31:12,067 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:12,079 INFO L518 ElimStorePlain]: Eliminatee v_prenex_131 vanished before elimination [2021-07-09 17:31:12,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:12,079 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:31:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:12,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597602450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:12,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:12,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:31:12,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324981168] [2021-07-09 17:31:12,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:12,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:12,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:12,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:12,112 INFO L87 Difference]: Start difference. First operand 87 states and 186 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:12,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:12,365 INFO L93 Difference]: Finished difference Result 120 states and 243 transitions. [2021-07-09 17:31:12,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:12,366 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:12,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:12,366 INFO L225 Difference]: With dead ends: 120 [2021-07-09 17:31:12,366 INFO L226 Difference]: Without dead ends: 120 [2021-07-09 17:31:12,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 259.3ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:12,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-09 17:31:12,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 87. [2021-07-09 17:31:12,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.1627906976744184) internal successors, (186), 86 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 186 transitions. [2021-07-09 17:31:12,367 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 186 transitions. Word has length 17 [2021-07-09 17:31:12,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:12,367 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 186 transitions. [2021-07-09 17:31:12,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:12,367 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 186 transitions. [2021-07-09 17:31:12,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:12,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:12,367 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:12,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1073,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:12,568 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:12,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:12,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1854108634, now seen corresponding path program 173 times [2021-07-09 17:31:12,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:12,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831174839] [2021-07-09 17:31:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:12,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:12,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831174839] [2021-07-09 17:31:12,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831174839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:12,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112237508] [2021-07-09 17:31:12,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:12,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:31:12,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:12,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:12,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:12,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:12,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:31:12,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,771 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:31:12,771 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:31:12,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:31:12,773 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:12,785 INFO L518 ElimStorePlain]: Eliminatee v_prenex_134 vanished before elimination [2021-07-09 17:31:12,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:12,786 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:31:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:12,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112237508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:12,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:12,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:31:12,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628831126] [2021-07-09 17:31:12,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:12,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:12,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:12,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:12,810 INFO L87 Difference]: Start difference. First operand 87 states and 186 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:13,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:13,112 INFO L93 Difference]: Finished difference Result 118 states and 236 transitions. [2021-07-09 17:31:13,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:13,113 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:13,113 INFO L225 Difference]: With dead ends: 118 [2021-07-09 17:31:13,113 INFO L226 Difference]: Without dead ends: 116 [2021-07-09 17:31:13,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 288.0ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-07-09 17:31:13,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 87. [2021-07-09 17:31:13,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 86 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:13,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 185 transitions. [2021-07-09 17:31:13,114 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 185 transitions. Word has length 17 [2021-07-09 17:31:13,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:13,114 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 185 transitions. [2021-07-09 17:31:13,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:13,114 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 185 transitions. [2021-07-09 17:31:13,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:13,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:13,115 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:13,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1080,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:13,315 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:13,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:13,315 INFO L82 PathProgramCache]: Analyzing trace with hash 330048910, now seen corresponding path program 174 times [2021-07-09 17:31:13,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:13,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082000840] [2021-07-09 17:31:13,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:13,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:13,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082000840] [2021-07-09 17:31:13,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082000840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:13,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15703510] [2021-07-09 17:31:13,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:13,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:31:13,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:13,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:13,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:13,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15703510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:13,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:13,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:31:13,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691212623] [2021-07-09 17:31:13,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:13,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:13,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:13,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:13,509 INFO L87 Difference]: Start difference. First operand 87 states and 185 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:13,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:13,692 INFO L93 Difference]: Finished difference Result 132 states and 265 transitions. [2021-07-09 17:31:13,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:13,692 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:13,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:13,692 INFO L225 Difference]: With dead ends: 132 [2021-07-09 17:31:13,692 INFO L226 Difference]: Without dead ends: 132 [2021-07-09 17:31:13,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:13,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-07-09 17:31:13,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 86. [2021-07-09 17:31:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.152941176470588) internal successors, (183), 85 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:13,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 183 transitions. [2021-07-09 17:31:13,694 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 183 transitions. Word has length 17 [2021-07-09 17:31:13,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:13,694 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 183 transitions. [2021-07-09 17:31:13,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:13,694 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 183 transitions. [2021-07-09 17:31:13,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:13,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:13,694 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:13,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1088 [2021-07-09 17:31:13,901 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:13,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:13,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1903003084, now seen corresponding path program 175 times [2021-07-09 17:31:13,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:13,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678316175] [2021-07-09 17:31:13,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:13,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:13,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678316175] [2021-07-09 17:31:13,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678316175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:13,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231293595] [2021-07-09 17:31:13,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:13,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:13,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:14,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231293595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:14,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:14,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:31:14,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302147886] [2021-07-09 17:31:14,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:14,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:14,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:14,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:14,081 INFO L87 Difference]: Start difference. First operand 86 states and 183 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:14,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:14,295 INFO L93 Difference]: Finished difference Result 94 states and 195 transitions. [2021-07-09 17:31:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:31:14,295 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:14,295 INFO L225 Difference]: With dead ends: 94 [2021-07-09 17:31:14,295 INFO L226 Difference]: Without dead ends: 90 [2021-07-09 17:31:14,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 233.4ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-09 17:31:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2021-07-09 17:31:14,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-07-09 17:31:14,297 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 17 [2021-07-09 17:31:14,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:14,297 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-07-09 17:31:14,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:14,297 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-07-09 17:31:14,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:14,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:14,297 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:14,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1098,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:14,501 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:14,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1816121850, now seen corresponding path program 176 times [2021-07-09 17:31:14,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:14,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252349928] [2021-07-09 17:31:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:14,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:14,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252349928] [2021-07-09 17:31:14,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252349928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:14,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344120508] [2021-07-09 17:31:14,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:14,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:14,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:14,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:31:14,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:14,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:14,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:14,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:14,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:14,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:14,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:14,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:14,687 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:31:14,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:14,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:31:14,690 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:14,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:14,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:14,696 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:31:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:14,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344120508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:14,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:14,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:31:14,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282290827] [2021-07-09 17:31:14,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:14,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:14,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:14,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:14,712 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:14,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:14,833 INFO L93 Difference]: Finished difference Result 105 states and 218 transitions. [2021-07-09 17:31:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:31:14,833 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:14,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:14,834 INFO L225 Difference]: With dead ends: 105 [2021-07-09 17:31:14,834 INFO L226 Difference]: Without dead ends: 105 [2021-07-09 17:31:14,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:14,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-09 17:31:14,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 79. [2021-07-09 17:31:14,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.128205128205128) internal successors, (166), 78 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:14,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 166 transitions. [2021-07-09 17:31:14,835 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 166 transitions. Word has length 17 [2021-07-09 17:31:14,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:14,835 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 166 transitions. [2021-07-09 17:31:14,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:14,835 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 166 transitions. [2021-07-09 17:31:14,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:14,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:14,835 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:15,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1103 [2021-07-09 17:31:15,049 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:15,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:15,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1691934642, now seen corresponding path program 177 times [2021-07-09 17:31:15,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:15,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249665515] [2021-07-09 17:31:15,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:15,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:15,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249665515] [2021-07-09 17:31:15,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249665515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:15,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400178505] [2021-07-09 17:31:15,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:15,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:31:15,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:15,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:31:15,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:15,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:15,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:15,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:15,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:15,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:15,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:15,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:15,253 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-07-09 17:31:15,254 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:31:15,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:15,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:15,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:15,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:15,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:15,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:31:15,274 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:15,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:15,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:15,290 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:31:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:15,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400178505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:15,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:15,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:31:15,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13269521] [2021-07-09 17:31:15,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:15,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:15,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:15,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:15,319 INFO L87 Difference]: Start difference. First operand 79 states and 166 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:15,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:15,417 INFO L93 Difference]: Finished difference Result 109 states and 213 transitions. [2021-07-09 17:31:15,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:15,417 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:15,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:15,418 INFO L225 Difference]: With dead ends: 109 [2021-07-09 17:31:15,418 INFO L226 Difference]: Without dead ends: 106 [2021-07-09 17:31:15,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:15,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-09 17:31:15,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-07-09 17:31:15,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.142857142857143) internal successors, (180), 84 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:15,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2021-07-09 17:31:15,419 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 17 [2021-07-09 17:31:15,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:15,419 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2021-07-09 17:31:15,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:15,419 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2021-07-09 17:31:15,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:15,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:15,419 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:15,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1105 [2021-07-09 17:31:15,620 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:15,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:15,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1265797140, now seen corresponding path program 178 times [2021-07-09 17:31:15,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:15,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126251696] [2021-07-09 17:31:15,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:15,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:15,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126251696] [2021-07-09 17:31:15,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126251696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:15,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153138174] [2021-07-09 17:31:15,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:15,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:15,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:15,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:15,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:15,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:15,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:15,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:15,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:15,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:15,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:31:15,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:15,862 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:31:15,862 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:31:15,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:31:15,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:15,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:15,876 INFO L518 ElimStorePlain]: Eliminatee v_prenex_141 vanished before elimination [2021-07-09 17:31:15,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:15,877 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:31:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:15,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153138174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:15,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:15,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:31:15,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526590186] [2021-07-09 17:31:15,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:15,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:15,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:15,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:15,911 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:16,160 INFO L93 Difference]: Finished difference Result 109 states and 214 transitions. [2021-07-09 17:31:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:16,160 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:16,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:16,161 INFO L225 Difference]: With dead ends: 109 [2021-07-09 17:31:16,161 INFO L226 Difference]: Without dead ends: 109 [2021-07-09 17:31:16,161 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 264.6ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:16,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-07-09 17:31:16,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 82. [2021-07-09 17:31:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.074074074074074) internal successors, (168), 81 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 168 transitions. [2021-07-09 17:31:16,162 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 168 transitions. Word has length 17 [2021-07-09 17:31:16,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:16,162 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 168 transitions. [2021-07-09 17:31:16,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,162 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 168 transitions. [2021-07-09 17:31:16,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:16,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:16,162 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:16,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-07-09 17:31:16,363 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:16,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:16,363 INFO L82 PathProgramCache]: Analyzing trace with hash -555749370, now seen corresponding path program 179 times [2021-07-09 17:31:16,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:16,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58840447] [2021-07-09 17:31:16,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:16,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:16,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58840447] [2021-07-09 17:31:16,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58840447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:16,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027259021] [2021-07-09 17:31:16,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:16,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:31:16,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:16,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:16,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:16,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027259021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:16,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:16,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:31:16,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623305285] [2021-07-09 17:31:16,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:16,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:16,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:16,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:16,573 INFO L87 Difference]: Start difference. First operand 82 states and 168 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:16,707 INFO L93 Difference]: Finished difference Result 106 states and 204 transitions. [2021-07-09 17:31:16,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:16,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:16,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:16,708 INFO L225 Difference]: With dead ends: 106 [2021-07-09 17:31:16,708 INFO L226 Difference]: Without dead ends: 106 [2021-07-09 17:31:16,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:16,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-09 17:31:16,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2021-07-09 17:31:16,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 166 transitions. [2021-07-09 17:31:16,709 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 166 transitions. Word has length 17 [2021-07-09 17:31:16,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:16,709 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 166 transitions. [2021-07-09 17:31:16,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,709 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 166 transitions. [2021-07-09 17:31:16,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:16,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:16,710 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:16,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1117,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:16,910 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:16,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:16,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1506165932, now seen corresponding path program 180 times [2021-07-09 17:31:16,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:16,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342378183] [2021-07-09 17:31:16,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:16,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:16,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342378183] [2021-07-09 17:31:16,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342378183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:16,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795884275] [2021-07-09 17:31:16,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:16,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:31:16,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:16,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:31:16,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:17,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795884275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:17,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:17,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:31:17,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911322343] [2021-07-09 17:31:17,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:17,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:17,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:17,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:17,113 INFO L87 Difference]: Start difference. First operand 81 states and 166 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:17,217 INFO L93 Difference]: Finished difference Result 89 states and 176 transitions. [2021-07-09 17:31:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:17,218 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:17,218 INFO L225 Difference]: With dead ends: 89 [2021-07-09 17:31:17,218 INFO L226 Difference]: Without dead ends: 85 [2021-07-09 17:31:17,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:17,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-07-09 17:31:17,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2021-07-09 17:31:17,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.0625) internal successors, (165), 80 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 165 transitions. [2021-07-09 17:31:17,219 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 165 transitions. Word has length 17 [2021-07-09 17:31:17,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:17,219 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 165 transitions. [2021-07-09 17:31:17,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,219 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 165 transitions. [2021-07-09 17:31:17,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:17,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:17,220 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:17,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1129,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:17,420 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:17,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:17,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1593047166, now seen corresponding path program 181 times [2021-07-09 17:31:17,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:17,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197882398] [2021-07-09 17:31:17,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:17,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:17,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197882398] [2021-07-09 17:31:17,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197882398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:17,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403091550] [2021-07-09 17:31:17,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:17,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:17,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:17,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403091550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:17,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:17,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:31:17,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401060710] [2021-07-09 17:31:17,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:17,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:17,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:17,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:17,595 INFO L87 Difference]: Start difference. First operand 81 states and 165 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:17,675 INFO L93 Difference]: Finished difference Result 101 states and 201 transitions. [2021-07-09 17:31:17,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:31:17,675 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:17,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:17,676 INFO L225 Difference]: With dead ends: 101 [2021-07-09 17:31:17,676 INFO L226 Difference]: Without dead ends: 101 [2021-07-09 17:31:17,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:17,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-07-09 17:31:17,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 80. [2021-07-09 17:31:17,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 79 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 163 transitions. [2021-07-09 17:31:17,677 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 163 transitions. Word has length 17 [2021-07-09 17:31:17,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:17,677 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 163 transitions. [2021-07-09 17:31:17,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,677 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 163 transitions. [2021-07-09 17:31:17,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:17,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:17,677 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:17,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1134,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:17,878 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:17,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:17,878 INFO L82 PathProgramCache]: Analyzing trace with hash 999819666, now seen corresponding path program 182 times [2021-07-09 17:31:17,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:17,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372298771] [2021-07-09 17:31:17,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:17,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:17,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372298771] [2021-07-09 17:31:17,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372298771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:17,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000860765] [2021-07-09 17:31:17,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:17,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:17,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:17,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:31:17,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:18,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000860765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:18,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:18,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:31:18,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845370168] [2021-07-09 17:31:18,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:18,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:18,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:18,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:18,099 INFO L87 Difference]: Start difference. First operand 80 states and 163 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:18,216 INFO L93 Difference]: Finished difference Result 86 states and 170 transitions. [2021-07-09 17:31:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:18,217 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:18,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:18,217 INFO L225 Difference]: With dead ends: 86 [2021-07-09 17:31:18,217 INFO L226 Difference]: Without dead ends: 80 [2021-07-09 17:31:18,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:18,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-09 17:31:18,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-07-09 17:31:18,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.050632911392405) internal successors, (162), 79 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-07-09 17:31:18,218 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-07-09 17:31:18,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:18,218 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-07-09 17:31:18,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,218 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-07-09 17:31:18,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:18,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:18,219 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:18,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1138 [2021-07-09 17:31:18,419 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:18,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:18,419 INFO L82 PathProgramCache]: Analyzing trace with hash -513736954, now seen corresponding path program 183 times [2021-07-09 17:31:18,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:18,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682383955] [2021-07-09 17:31:18,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:18,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:18,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682383955] [2021-07-09 17:31:18,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682383955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:18,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577899835] [2021-07-09 17:31:18,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:18,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:31:18,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:18,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:31:18,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:18,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:18,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:18,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:18,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:18,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:18,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:18,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:18,603 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:31:18,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:18,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:31:18,606 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:18,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:18,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:18,611 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:31:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:18,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577899835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:18,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:18,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:31:18,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111425512] [2021-07-09 17:31:18,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:18,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:18,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:18,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:18,630 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:18,701 INFO L93 Difference]: Finished difference Result 89 states and 177 transitions. [2021-07-09 17:31:18,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:18,701 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:18,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:18,702 INFO L225 Difference]: With dead ends: 89 [2021-07-09 17:31:18,702 INFO L226 Difference]: Without dead ends: 89 [2021-07-09 17:31:18,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:18,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-09 17:31:18,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2021-07-09 17:31:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 143 transitions. [2021-07-09 17:31:18,703 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 143 transitions. Word has length 17 [2021-07-09 17:31:18,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:18,703 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 143 transitions. [2021-07-09 17:31:18,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,703 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 143 transitions. [2021-07-09 17:31:18,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:18,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:18,703 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:18,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1142,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:18,904 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:18,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:18,904 INFO L82 PathProgramCache]: Analyzing trace with hash 68118298, now seen corresponding path program 184 times [2021-07-09 17:31:18,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:18,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977191583] [2021-07-09 17:31:18,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:18,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:18,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977191583] [2021-07-09 17:31:18,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977191583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:18,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507793184] [2021-07-09 17:31:18,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:18,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:18,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:18,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:18,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:19,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507793184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:19,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:19,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:31:19,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986121314] [2021-07-09 17:31:19,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:19,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:19,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:19,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:19,126 INFO L87 Difference]: Start difference. First operand 72 states and 143 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:19,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:19,326 INFO L93 Difference]: Finished difference Result 117 states and 217 transitions. [2021-07-09 17:31:19,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:19,326 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:19,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:19,327 INFO L225 Difference]: With dead ends: 117 [2021-07-09 17:31:19,327 INFO L226 Difference]: Without dead ends: 114 [2021-07-09 17:31:19,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 198.9ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:19,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-07-09 17:31:19,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2021-07-09 17:31:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:19,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-07-09 17:31:19,328 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-07-09 17:31:19,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:19,328 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-07-09 17:31:19,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:19,328 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-07-09 17:31:19,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:19,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:19,328 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:19,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1144 [2021-07-09 17:31:19,529 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:19,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:19,529 INFO L82 PathProgramCache]: Analyzing trace with hash -155813170, now seen corresponding path program 185 times [2021-07-09 17:31:19,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:19,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335275193] [2021-07-09 17:31:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:19,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:19,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335275193] [2021-07-09 17:31:19,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335275193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:19,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765939906] [2021-07-09 17:31:19,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:19,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:31:19,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:19,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:19,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:19,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:31:19,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:19,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:19,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:19,793 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:31:19,794 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:31:19,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:31:19,796 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:19,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:19,808 INFO L518 ElimStorePlain]: Eliminatee v_prenex_148 vanished before elimination [2021-07-09 17:31:19,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:19,809 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:31:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:19,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765939906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:19,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:19,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:31:19,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860976775] [2021-07-09 17:31:19,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:19,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:19,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:19,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:19,834 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:20,165 INFO L93 Difference]: Finished difference Result 99 states and 189 transitions. [2021-07-09 17:31:20,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:20,165 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:20,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:20,166 INFO L225 Difference]: With dead ends: 99 [2021-07-09 17:31:20,166 INFO L226 Difference]: Without dead ends: 99 [2021-07-09 17:31:20,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 387.6ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:20,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-09 17:31:20,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 78. [2021-07-09 17:31:20,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-07-09 17:31:20,167 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-07-09 17:31:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:20,167 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-07-09 17:31:20,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-07-09 17:31:20,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:20,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:20,167 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:20,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1155 [2021-07-09 17:31:20,368 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:20,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:20,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1204303570, now seen corresponding path program 186 times [2021-07-09 17:31:20,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:20,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168822595] [2021-07-09 17:31:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:20,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:20,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168822595] [2021-07-09 17:31:20,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168822595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:20,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054253931] [2021-07-09 17:31:20,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:20,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:31:20,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:20,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:31:20,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:20,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:20,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:20,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:20,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:20,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:20,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:20,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:20,646 INFO L628 ElimStorePlain]: treesize reduction 70, result has 41.2 percent of original size [2021-07-09 17:31:20,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:20,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:31:20,649 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:20,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:20,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:31:20,667 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:20,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:20,681 INFO L518 ElimStorePlain]: Eliminatee v_prenex_151 vanished before elimination [2021-07-09 17:31:20,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:20,682 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:31:20,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:20,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054253931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:20,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:20,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:31:20,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832061020] [2021-07-09 17:31:20,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:20,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:20,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:20,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:20,718 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:20,967 INFO L93 Difference]: Finished difference Result 116 states and 214 transitions. [2021-07-09 17:31:20,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:20,967 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:20,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:20,967 INFO L225 Difference]: With dead ends: 116 [2021-07-09 17:31:20,967 INFO L226 Difference]: Without dead ends: 116 [2021-07-09 17:31:20,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:20,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-07-09 17:31:20,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 77. [2021-07-09 17:31:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-07-09 17:31:20,969 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-07-09 17:31:20,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:20,969 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-07-09 17:31:20,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,969 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-07-09 17:31:20,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:20,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:20,969 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:21,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1162,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:21,177 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:21,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:21,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1028748424, now seen corresponding path program 187 times [2021-07-09 17:31:21,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:21,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156528353] [2021-07-09 17:31:21,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:21,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:21,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156528353] [2021-07-09 17:31:21,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156528353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:21,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463174705] [2021-07-09 17:31:21,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:21,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:21,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:21,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463174705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:21,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:21,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:31:21,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620045176] [2021-07-09 17:31:21,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:21,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:21,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:21,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:21,398 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:21,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:21,790 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-07-09 17:31:21,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:21,791 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:21,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:21,791 INFO L225 Difference]: With dead ends: 98 [2021-07-09 17:31:21,791 INFO L226 Difference]: Without dead ends: 94 [2021-07-09 17:31:21,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 406.7ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:21,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-09 17:31:21,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2021-07-09 17:31:21,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.026315789473684) internal successors, (154), 76 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 154 transitions. [2021-07-09 17:31:21,792 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 154 transitions. Word has length 17 [2021-07-09 17:31:21,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:21,792 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 154 transitions. [2021-07-09 17:31:21,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:21,792 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 154 transitions. [2021-07-09 17:31:21,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:21,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:21,792 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:21,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1166 [2021-07-09 17:31:21,993 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:21,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:21,993 INFO L82 PathProgramCache]: Analyzing trace with hash -941867190, now seen corresponding path program 188 times [2021-07-09 17:31:21,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:21,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482338480] [2021-07-09 17:31:21,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:22,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:22,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482338480] [2021-07-09 17:31:22,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482338480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:22,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562279386] [2021-07-09 17:31:22,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:22,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:22,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:22,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:31:22,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:22,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:22,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:22,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:22,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:22,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:22,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:22,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:22,219 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:31:22,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:22,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:31:22,222 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:22,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:22,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:22,227 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:31:22,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:22,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562279386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:22,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:22,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:31:22,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923634834] [2021-07-09 17:31:22,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:22,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:22,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:22,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:22,243 INFO L87 Difference]: Start difference. First operand 77 states and 154 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:22,430 INFO L93 Difference]: Finished difference Result 110 states and 208 transitions. [2021-07-09 17:31:22,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:22,430 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:22,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:22,430 INFO L225 Difference]: With dead ends: 110 [2021-07-09 17:31:22,431 INFO L226 Difference]: Without dead ends: 110 [2021-07-09 17:31:22,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 202.5ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:22,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-07-09 17:31:22,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2021-07-09 17:31:22,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-07-09 17:31:22,432 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-07-09 17:31:22,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:22,432 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-07-09 17:31:22,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,432 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-07-09 17:31:22,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:22,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:22,432 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:22,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1172,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:22,641 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:22,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:22,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1535094690, now seen corresponding path program 189 times [2021-07-09 17:31:22,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:22,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241273537] [2021-07-09 17:31:22,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:22,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:22,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241273537] [2021-07-09 17:31:22,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241273537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:22,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935628339] [2021-07-09 17:31:22,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:22,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:31:22,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:22,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:22,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:22,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935628339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:22,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:22,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:31:22,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868541940] [2021-07-09 17:31:22,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:22,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:22,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:22,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:22,942 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:23,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:23,307 INFO L93 Difference]: Finished difference Result 99 states and 183 transitions. [2021-07-09 17:31:23,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:23,307 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:23,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:23,307 INFO L225 Difference]: With dead ends: 99 [2021-07-09 17:31:23,307 INFO L226 Difference]: Without dead ends: 93 [2021-07-09 17:31:23,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 431.9ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:23,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-09 17:31:23,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2021-07-09 17:31:23,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.013333333333333) internal successors, (151), 75 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:23,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 151 transitions. [2021-07-09 17:31:23,308 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 151 transitions. Word has length 17 [2021-07-09 17:31:23,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:23,308 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 151 transitions. [2021-07-09 17:31:23,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:23,309 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 151 transitions. [2021-07-09 17:31:23,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:23,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:23,309 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:23,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1174 [2021-07-09 17:31:23,525 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:23,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:23,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1246315986, now seen corresponding path program 190 times [2021-07-09 17:31:23,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:23,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029075746] [2021-07-09 17:31:23,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:23,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:23,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029075746] [2021-07-09 17:31:23,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029075746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:23,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405418707] [2021-07-09 17:31:23,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:23,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:23,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:23,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:23,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:23,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:23,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405418707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:23,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:23,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:31:23,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885850344] [2021-07-09 17:31:23,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:31:23,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:23,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:31:23,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:23,701 INFO L87 Difference]: Start difference. First operand 76 states and 151 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:23,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:23,845 INFO L93 Difference]: Finished difference Result 119 states and 226 transitions. [2021-07-09 17:31:23,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:23,845 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:23,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:23,846 INFO L225 Difference]: With dead ends: 119 [2021-07-09 17:31:23,846 INFO L226 Difference]: Without dead ends: 119 [2021-07-09 17:31:23,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 158.2ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:23,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-09 17:31:23,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 75. [2021-07-09 17:31:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2021-07-09 17:31:23,847 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 17 [2021-07-09 17:31:23,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:23,847 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2021-07-09 17:31:23,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:23,847 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2021-07-09 17:31:23,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:23,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:23,847 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:24,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1179 [2021-07-09 17:31:24,051 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:24,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:24,051 INFO L82 PathProgramCache]: Analyzing trace with hash -494858892, now seen corresponding path program 191 times [2021-07-09 17:31:24,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:24,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947820861] [2021-07-09 17:31:24,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:24,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:24,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947820861] [2021-07-09 17:31:24,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947820861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:24,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233619869] [2021-07-09 17:31:24,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:24,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:31:24,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:24,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:24,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:24,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233619869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:24,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:24,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:31:24,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775757758] [2021-07-09 17:31:24,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:31:24,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:24,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:31:24,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:31:24,193 INFO L87 Difference]: Start difference. First operand 75 states and 149 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:24,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:24,425 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2021-07-09 17:31:24,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:24,425 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:24,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:24,426 INFO L225 Difference]: With dead ends: 81 [2021-07-09 17:31:24,426 INFO L226 Difference]: Without dead ends: 73 [2021-07-09 17:31:24,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 262.9ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:24,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-07-09 17:31:24,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-07-09 17:31:24,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:24,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-07-09 17:31:24,427 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 17 [2021-07-09 17:31:24,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:24,427 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-07-09 17:31:24,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:24,427 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-07-09 17:31:24,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:24,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:24,427 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:24,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1183,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:24,628 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:24,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:24,628 INFO L82 PathProgramCache]: Analyzing trace with hash -82381434, now seen corresponding path program 192 times [2021-07-09 17:31:24,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:24,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054156123] [2021-07-09 17:31:24,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:24,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:24,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054156123] [2021-07-09 17:31:24,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054156123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:24,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145817629] [2021-07-09 17:31:24,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:24,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:31:24,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:24,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:31:24,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:24,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:24,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145817629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:24,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:24,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:31:24,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543156589] [2021-07-09 17:31:24,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:31:24,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:24,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:31:24,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:31:24,805 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:24,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:24,892 INFO L93 Difference]: Finished difference Result 85 states and 166 transitions. [2021-07-09 17:31:24,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:24,892 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:24,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:24,892 INFO L225 Difference]: With dead ends: 85 [2021-07-09 17:31:24,892 INFO L226 Difference]: Without dead ends: 85 [2021-07-09 17:31:24,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:31:24,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-07-09 17:31:24,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2021-07-09 17:31:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9696969696969697) internal successors, (130), 66 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 130 transitions. [2021-07-09 17:31:24,893 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 130 transitions. Word has length 17 [2021-07-09 17:31:24,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:24,893 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 130 transitions. [2021-07-09 17:31:24,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:24,893 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 130 transitions. [2021-07-09 17:31:24,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:24,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:24,894 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:25,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1187 [2021-07-09 17:31:25,094 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:25,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:25,094 INFO L82 PathProgramCache]: Analyzing trace with hash 413516902, now seen corresponding path program 193 times [2021-07-09 17:31:25,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:25,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181597483] [2021-07-09 17:31:25,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:25,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:25,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181597483] [2021-07-09 17:31:25,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181597483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:25,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269535733] [2021-07-09 17:31:25,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:25,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:25,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:25,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:25,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:25,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:25,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:25,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:25,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:25,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:25,436 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-07-09 17:31:25,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:25,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:25,439 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:25,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:25,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:25,446 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:31:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:25,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269535733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:25,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:25,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 17:31:25,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14711709] [2021-07-09 17:31:25,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:25,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:25,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:25,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:25,482 INFO L87 Difference]: Start difference. First operand 67 states and 130 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:25,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:25,735 INFO L93 Difference]: Finished difference Result 120 states and 223 transitions. [2021-07-09 17:31:25,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:31:25,735 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:25,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:25,736 INFO L225 Difference]: With dead ends: 120 [2021-07-09 17:31:25,736 INFO L226 Difference]: Without dead ends: 96 [2021-07-09 17:31:25,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 384.9ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:25,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-09 17:31:25,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 69. [2021-07-09 17:31:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 68 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 134 transitions. [2021-07-09 17:31:25,737 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 134 transitions. Word has length 18 [2021-07-09 17:31:25,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:25,737 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 134 transitions. [2021-07-09 17:31:25,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:25,737 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 134 transitions. [2021-07-09 17:31:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:25,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:25,737 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:25,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1190,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:25,937 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:25,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:25,938 INFO L82 PathProgramCache]: Analyzing trace with hash 293588210, now seen corresponding path program 194 times [2021-07-09 17:31:25,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:25,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797431633] [2021-07-09 17:31:25,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:26,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:26,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797431633] [2021-07-09 17:31:26,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797431633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:26,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395096030] [2021-07-09 17:31:26,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:26,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:26,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:26,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:31:26,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:26,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:26,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:26,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:26,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:26,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:26,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:31:26,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:26,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:26,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:26,281 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 17:31:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:26,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395096030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:26,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:26,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-09 17:31:26,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341158366] [2021-07-09 17:31:26,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:26,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:26,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:26,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:26,315 INFO L87 Difference]: Start difference. First operand 69 states and 134 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:26,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:26,560 INFO L93 Difference]: Finished difference Result 116 states and 219 transitions. [2021-07-09 17:31:26,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:31:26,560 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:26,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:26,560 INFO L225 Difference]: With dead ends: 116 [2021-07-09 17:31:26,560 INFO L226 Difference]: Without dead ends: 109 [2021-07-09 17:31:26,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:26,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-07-09 17:31:26,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2021-07-09 17:31:26,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 72 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:26,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2021-07-09 17:31:26,562 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 18 [2021-07-09 17:31:26,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:26,562 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2021-07-09 17:31:26,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:26,562 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2021-07-09 17:31:26,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:26,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:26,562 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:26,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1193 [2021-07-09 17:31:26,762 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:26,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:26,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1245941418, now seen corresponding path program 195 times [2021-07-09 17:31:26,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:26,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706561681] [2021-07-09 17:31:26,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:26,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:26,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706561681] [2021-07-09 17:31:26,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706561681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:26,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389317811] [2021-07-09 17:31:26,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:26,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:31:26,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:26,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:26,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:27,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:27,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:27,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:27,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:27,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:27,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:27,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:27,144 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-07-09 17:31:27,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:27,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:27,148 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:27,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:27,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:27,157 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:31:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:27,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389317811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:27,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:27,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 17:31:27,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779916528] [2021-07-09 17:31:27,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:27,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:27,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:27,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:27,198 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:27,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:27,462 INFO L93 Difference]: Finished difference Result 120 states and 224 transitions. [2021-07-09 17:31:27,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:31:27,462 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:27,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:27,463 INFO L225 Difference]: With dead ends: 120 [2021-07-09 17:31:27,463 INFO L226 Difference]: Without dead ends: 104 [2021-07-09 17:31:27,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 378.3ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:27,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-09 17:31:27,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2021-07-09 17:31:27,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 73 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:27,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 144 transitions. [2021-07-09 17:31:27,464 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 144 transitions. Word has length 18 [2021-07-09 17:31:27,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:27,464 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 144 transitions. [2021-07-09 17:31:27,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:27,464 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 144 transitions. [2021-07-09 17:31:27,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:27,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:27,464 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:27,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1196,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:27,665 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:27,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:27,665 INFO L82 PathProgramCache]: Analyzing trace with hash 2107946482, now seen corresponding path program 196 times [2021-07-09 17:31:27,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:27,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274909434] [2021-07-09 17:31:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:27,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:27,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274909434] [2021-07-09 17:31:27,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274909434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:27,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149068031] [2021-07-09 17:31:27,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:27,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:27,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:27,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:27,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:28,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:28,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:28,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:28,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:28,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:28,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:28,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:28,081 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-07-09 17:31:28,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:28,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:28,084 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:28,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:28,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:28,091 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:31:28,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:28,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149068031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:28,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:28,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 17:31:28,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587225582] [2021-07-09 17:31:28,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:28,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:28,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:28,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:28,131 INFO L87 Difference]: Start difference. First operand 74 states and 144 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:28,493 INFO L93 Difference]: Finished difference Result 140 states and 263 transitions. [2021-07-09 17:31:28,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:28,493 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:28,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:28,494 INFO L225 Difference]: With dead ends: 140 [2021-07-09 17:31:28,494 INFO L226 Difference]: Without dead ends: 118 [2021-07-09 17:31:28,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 470.4ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:28,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-07-09 17:31:28,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 76. [2021-07-09 17:31:28,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 149 transitions. [2021-07-09 17:31:28,495 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 149 transitions. Word has length 18 [2021-07-09 17:31:28,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:28,495 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 149 transitions. [2021-07-09 17:31:28,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,495 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 149 transitions. [2021-07-09 17:31:28,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:28,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:28,495 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:28,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1199 [2021-07-09 17:31:28,696 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:28,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:28,696 INFO L82 PathProgramCache]: Analyzing trace with hash -551383242, now seen corresponding path program 197 times [2021-07-09 17:31:28,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:28,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788694972] [2021-07-09 17:31:28,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:28,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:28,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788694972] [2021-07-09 17:31:28,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788694972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:28,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515271256] [2021-07-09 17:31:28,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:28,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:31:28,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:28,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:28,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:29,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:29,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:29,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:29,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:29,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:29,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,034 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-07-09 17:31:29,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:29,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:29,037 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:29,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:29,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,044 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:31:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:29,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515271256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:29,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:29,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 17:31:29,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799765294] [2021-07-09 17:31:29,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:29,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:29,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:29,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:29,079 INFO L87 Difference]: Start difference. First operand 76 states and 149 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:29,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:29,234 INFO L93 Difference]: Finished difference Result 97 states and 182 transitions. [2021-07-09 17:31:29,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:31:29,234 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:29,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:29,235 INFO L225 Difference]: With dead ends: 97 [2021-07-09 17:31:29,235 INFO L226 Difference]: Without dead ends: 78 [2021-07-09 17:31:29,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 281.9ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:29,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-07-09 17:31:29,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-07-09 17:31:29,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 77 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:29,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 153 transitions. [2021-07-09 17:31:29,236 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 153 transitions. Word has length 18 [2021-07-09 17:31:29,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:29,236 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 153 transitions. [2021-07-09 17:31:29,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 153 transitions. [2021-07-09 17:31:29,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:29,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:29,236 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:29,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1203 [2021-07-09 17:31:29,437 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:29,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:29,437 INFO L82 PathProgramCache]: Analyzing trace with hash 400969966, now seen corresponding path program 198 times [2021-07-09 17:31:29,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:29,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264804810] [2021-07-09 17:31:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:29,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:29,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264804810] [2021-07-09 17:31:29,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264804810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:29,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724028828] [2021-07-09 17:31:29,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:29,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:31:29,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:29,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:31:29,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:29,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:29,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:29,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:29,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:29,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:29,773 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:29,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:29,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,779 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 17:31:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:29,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724028828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:29,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:29,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 17:31:29,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98614537] [2021-07-09 17:31:29,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:29,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:29,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:29,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:29,815 INFO L87 Difference]: Start difference. First operand 78 states and 153 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:29,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:29,980 INFO L93 Difference]: Finished difference Result 95 states and 182 transitions. [2021-07-09 17:31:29,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:31:29,980 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:29,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:29,980 INFO L225 Difference]: With dead ends: 95 [2021-07-09 17:31:29,981 INFO L226 Difference]: Without dead ends: 88 [2021-07-09 17:31:29,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 294.0ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:29,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-09 17:31:29,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2021-07-09 17:31:29,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0) internal successors, (156), 78 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 156 transitions. [2021-07-09 17:31:29,982 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 156 transitions. Word has length 18 [2021-07-09 17:31:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:29,982 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 156 transitions. [2021-07-09 17:31:29,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:29,982 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 156 transitions. [2021-07-09 17:31:29,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:29,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:29,982 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:30,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1206,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:30,182 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:30,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:30,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1262975030, now seen corresponding path program 199 times [2021-07-09 17:31:30,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:30,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393902337] [2021-07-09 17:31:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:30,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:30,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393902337] [2021-07-09 17:31:30,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393902337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:30,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422638251] [2021-07-09 17:31:30,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:30,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:30,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:30,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:30,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:30,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:30,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:30,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:30,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:30,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:30,610 INFO L628 ElimStorePlain]: treesize reduction 34, result has 47.7 percent of original size [2021-07-09 17:31:30,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:30,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:31:30,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:30,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:30,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:30,619 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:31:30,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:30,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422638251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:30,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:30,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 17:31:30,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131026901] [2021-07-09 17:31:30,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:30,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:30,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:30,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:30,659 INFO L87 Difference]: Start difference. First operand 79 states and 156 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:30,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:30,880 INFO L93 Difference]: Finished difference Result 105 states and 201 transitions. [2021-07-09 17:31:30,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:30,880 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:30,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:30,880 INFO L225 Difference]: With dead ends: 105 [2021-07-09 17:31:30,880 INFO L226 Difference]: Without dead ends: 92 [2021-07-09 17:31:30,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 385.7ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:30,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-09 17:31:30,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-07-09 17:31:30,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0) internal successors, (158), 79 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:30,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 158 transitions. [2021-07-09 17:31:30,882 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 158 transitions. Word has length 18 [2021-07-09 17:31:30,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:30,882 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 158 transitions. [2021-07-09 17:31:30,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:30,882 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 158 transitions. [2021-07-09 17:31:30,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:30,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:30,882 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:31,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1210 [2021-07-09 17:31:31,082 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:31,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:31,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1895806994, now seen corresponding path program 200 times [2021-07-09 17:31:31,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:31,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953154889] [2021-07-09 17:31:31,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:31,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:31,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953154889] [2021-07-09 17:31:31,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953154889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:31,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410967025] [2021-07-09 17:31:31,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:31,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:31,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:31,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:31:31,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:31,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:31,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:31,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:31,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:31,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:31,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:31,494 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:31,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:31,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:31,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:31,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:31,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:31,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:31,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:31,543 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:31,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:31,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:31,563 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:31:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:31,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410967025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:31,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:31,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 17:31:31,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154084803] [2021-07-09 17:31:31,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:31,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:31,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:31,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:31,638 INFO L87 Difference]: Start difference. First operand 80 states and 158 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:31,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:31,947 INFO L93 Difference]: Finished difference Result 105 states and 205 transitions. [2021-07-09 17:31:31,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:31,948 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:31,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:31,948 INFO L225 Difference]: With dead ends: 105 [2021-07-09 17:31:31,948 INFO L226 Difference]: Without dead ends: 96 [2021-07-09 17:31:31,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 450.9ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:31,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-09 17:31:31,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 79. [2021-07-09 17:31:31,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0) internal successors, (156), 78 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:31,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 156 transitions. [2021-07-09 17:31:31,949 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 156 transitions. Word has length 18 [2021-07-09 17:31:31,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:31,949 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 156 transitions. [2021-07-09 17:31:31,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:31,949 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 156 transitions. [2021-07-09 17:31:31,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:31,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:31,950 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:32,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1214,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:32,150 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:32,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:32,150 INFO L82 PathProgramCache]: Analyzing trace with hash -484828314, now seen corresponding path program 201 times [2021-07-09 17:31:32,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:32,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536352139] [2021-07-09 17:31:32,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:32,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:32,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536352139] [2021-07-09 17:31:32,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536352139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:32,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931668795] [2021-07-09 17:31:32,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:32,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:31:32,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:32,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:32,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:32,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:32,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:32,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:32,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:32,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:32,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:32,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:32,482 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-07-09 17:31:32,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:32,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:32,486 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:32,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:32,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:32,492 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:31:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:32,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931668795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:32,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:32,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 17:31:32,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652818559] [2021-07-09 17:31:32,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:32,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:32,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:32,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:32,528 INFO L87 Difference]: Start difference. First operand 79 states and 156 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:32,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:32,734 INFO L93 Difference]: Finished difference Result 99 states and 188 transitions. [2021-07-09 17:31:32,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:32,734 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:32,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:32,734 INFO L225 Difference]: With dead ends: 99 [2021-07-09 17:31:32,734 INFO L226 Difference]: Without dead ends: 83 [2021-07-09 17:31:32,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 310.3ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:32,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-09 17:31:32,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-07-09 17:31:32,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0) internal successors, (164), 82 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:32,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 164 transitions. [2021-07-09 17:31:32,736 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 164 transitions. Word has length 18 [2021-07-09 17:31:32,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:32,736 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 164 transitions. [2021-07-09 17:31:32,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:32,736 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 164 transitions. [2021-07-09 17:31:32,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:32,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:32,736 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:32,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1219,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:32,936 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:32,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:32,937 INFO L82 PathProgramCache]: Analyzing trace with hash 377176750, now seen corresponding path program 202 times [2021-07-09 17:31:32,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:32,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523102782] [2021-07-09 17:31:32,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:33,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:33,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523102782] [2021-07-09 17:31:33,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523102782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:33,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476906018] [2021-07-09 17:31:33,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:33,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:33,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:33,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:33,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:33,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:33,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:33,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:33,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:33,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:33,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:33,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:33,287 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-07-09 17:31:33,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:33,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:33,290 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:33,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:33,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:33,297 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:31:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:33,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476906018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:33,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:33,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-09 17:31:33,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054450913] [2021-07-09 17:31:33,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:33,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:33,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:33,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:33,331 INFO L87 Difference]: Start difference. First operand 83 states and 164 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:33,661 INFO L93 Difference]: Finished difference Result 101 states and 196 transitions. [2021-07-09 17:31:33,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:31:33,661 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:33,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:33,661 INFO L225 Difference]: With dead ends: 101 [2021-07-09 17:31:33,661 INFO L226 Difference]: Without dead ends: 88 [2021-07-09 17:31:33,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 376.7ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:31:33,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-09 17:31:33,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2021-07-09 17:31:33,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0) internal successors, (166), 83 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 166 transitions. [2021-07-09 17:31:33,662 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 166 transitions. Word has length 18 [2021-07-09 17:31:33,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:33,662 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 166 transitions. [2021-07-09 17:31:33,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,662 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 166 transitions. [2021-07-09 17:31:33,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:33,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:33,663 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:33,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1223,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:33,863 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:33,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:33,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1513362022, now seen corresponding path program 203 times [2021-07-09 17:31:33,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:33,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516133143] [2021-07-09 17:31:33,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:34,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:34,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:34,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516133143] [2021-07-09 17:31:34,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516133143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:34,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295958885] [2021-07-09 17:31:34,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:34,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:31:34,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:34,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:34,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:34,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:34,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:34,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,286 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:31:34,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:34,291 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:34,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:34,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:34,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:34,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:34,341 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:34,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:34,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:34,362 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:31:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:34,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295958885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:34,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:34,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 17:31:34,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978509684] [2021-07-09 17:31:34,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:34,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:34,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:34,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:34,438 INFO L87 Difference]: Start difference. First operand 84 states and 166 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:34,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:34,858 INFO L93 Difference]: Finished difference Result 121 states and 225 transitions. [2021-07-09 17:31:34,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:34,859 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:34,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:34,859 INFO L225 Difference]: With dead ends: 121 [2021-07-09 17:31:34,859 INFO L226 Difference]: Without dead ends: 102 [2021-07-09 17:31:34,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 528.1ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:34,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-09 17:31:34,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2021-07-09 17:31:34,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.023529411764706) internal successors, (172), 85 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 172 transitions. [2021-07-09 17:31:34,860 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 172 transitions. Word has length 18 [2021-07-09 17:31:34,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:34,860 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 172 transitions. [2021-07-09 17:31:34,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:34,860 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 172 transitions. [2021-07-09 17:31:34,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:34,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:34,860 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:35,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1227 [2021-07-09 17:31:35,061 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:35,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:35,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1729607370, now seen corresponding path program 204 times [2021-07-09 17:31:35,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:35,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102725548] [2021-07-09 17:31:35,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:35,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:35,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102725548] [2021-07-09 17:31:35,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102725548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:35,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963072144] [2021-07-09 17:31:35,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:35,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:31:35,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:35,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:35,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:35,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:35,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:35,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:35,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:35,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:35,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:35,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:35,378 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-07-09 17:31:35,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:35,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:35,381 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:35,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:35,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:35,388 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:31:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:35,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963072144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:35,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:35,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 17:31:35,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475027986] [2021-07-09 17:31:35,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:35,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:35,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:35,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:35,426 INFO L87 Difference]: Start difference. First operand 86 states and 172 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:35,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:35,794 INFO L93 Difference]: Finished difference Result 110 states and 216 transitions. [2021-07-09 17:31:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:31:35,794 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:35,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:35,794 INFO L225 Difference]: With dead ends: 110 [2021-07-09 17:31:35,794 INFO L226 Difference]: Without dead ends: 97 [2021-07-09 17:31:35,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 382.7ms TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:35,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-09 17:31:35,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2021-07-09 17:31:35,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0217391304347827) internal successors, (186), 92 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:35,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 186 transitions. [2021-07-09 17:31:35,796 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 186 transitions. Word has length 18 [2021-07-09 17:31:35,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:35,796 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 186 transitions. [2021-07-09 17:31:35,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:35,796 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 186 transitions. [2021-07-09 17:31:35,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:35,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:35,796 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:35,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1232,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:35,996 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:35,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:35,997 INFO L82 PathProgramCache]: Analyzing trace with hash -593422098, now seen corresponding path program 205 times [2021-07-09 17:31:35,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:35,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632364994] [2021-07-09 17:31:35,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:36,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:36,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632364994] [2021-07-09 17:31:36,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632364994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:36,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819417639] [2021-07-09 17:31:36,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:36,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:36,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:36,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:36,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:36,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:36,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:36,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:36,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:36,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:36,360 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-07-09 17:31:36,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:36,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:36,364 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:36,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:36,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:36,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:36,389 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:36,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:36,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:36,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:36,414 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:36,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:36,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:36,434 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:31:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:36,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819417639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:36,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:36,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 17:31:36,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323134899] [2021-07-09 17:31:36,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:36,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:36,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:36,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:36,507 INFO L87 Difference]: Start difference. First operand 93 states and 186 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:37,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:37,038 INFO L93 Difference]: Finished difference Result 131 states and 247 transitions. [2021-07-09 17:31:37,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:31:37,038 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:37,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:37,038 INFO L225 Difference]: With dead ends: 131 [2021-07-09 17:31:37,039 INFO L226 Difference]: Without dead ends: 112 [2021-07-09 17:31:37,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 574.3ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:31:37,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-09 17:31:37,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2021-07-09 17:31:37,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.021978021978022) internal successors, (184), 91 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:37,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 184 transitions. [2021-07-09 17:31:37,040 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 184 transitions. Word has length 18 [2021-07-09 17:31:37,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:37,040 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 184 transitions. [2021-07-09 17:31:37,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:37,040 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 184 transitions. [2021-07-09 17:31:37,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:37,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:37,040 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:37,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1235 [2021-07-09 17:31:37,241 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:37,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:37,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1555374438, now seen corresponding path program 206 times [2021-07-09 17:31:37,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:37,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785425878] [2021-07-09 17:31:37,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:37,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:37,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785425878] [2021-07-09 17:31:37,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785425878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:37,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120799114] [2021-07-09 17:31:37,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:37,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:37,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:37,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:31:37,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:37,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:37,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:37,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:37,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:37,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:37,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:37,575 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:37,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:37,578 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:37,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:37,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:37,598 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:31:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:37,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120799114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:37,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:37,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 17:31:37,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570812385] [2021-07-09 17:31:37,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:37,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:37,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:37,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:37,667 INFO L87 Difference]: Start difference. First operand 92 states and 184 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:38,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:38,410 INFO L93 Difference]: Finished difference Result 160 states and 305 transitions. [2021-07-09 17:31:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:31:38,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:38,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:38,411 INFO L225 Difference]: With dead ends: 160 [2021-07-09 17:31:38,411 INFO L226 Difference]: Without dead ends: 137 [2021-07-09 17:31:38,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 783.1ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:31:38,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-09 17:31:38,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 95. [2021-07-09 17:31:38,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 94 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:38,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 194 transitions. [2021-07-09 17:31:38,413 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 194 transitions. Word has length 18 [2021-07-09 17:31:38,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:38,413 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 194 transitions. [2021-07-09 17:31:38,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:38,413 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 194 transitions. [2021-07-09 17:31:38,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:38,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:38,413 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:38,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1240,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:38,613 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:38,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:38,614 INFO L82 PathProgramCache]: Analyzing trace with hash -975694478, now seen corresponding path program 207 times [2021-07-09 17:31:38,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:38,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422236740] [2021-07-09 17:31:38,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:38,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:38,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:38,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422236740] [2021-07-09 17:31:38,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422236740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:38,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78396025] [2021-07-09 17:31:38,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:38,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:31:38,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:38,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:38,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:38,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:38,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:38,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:38,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:38,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:38,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:38,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:38,983 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-07-09 17:31:38,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:38,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:38,987 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:38,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:38,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:38,994 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:31:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:39,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78396025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:39,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:39,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:31:39,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187653909] [2021-07-09 17:31:39,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:31:39,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:39,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:31:39,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:39,030 INFO L87 Difference]: Start difference. First operand 95 states and 194 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:39,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:39,179 INFO L93 Difference]: Finished difference Result 117 states and 228 transitions. [2021-07-09 17:31:39,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:31:39,180 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:39,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:39,180 INFO L225 Difference]: With dead ends: 117 [2021-07-09 17:31:39,180 INFO L226 Difference]: Without dead ends: 98 [2021-07-09 17:31:39,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 298.0ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:39,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-09 17:31:39,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-07-09 17:31:39,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0631578947368423) internal successors, (196), 95 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 196 transitions. [2021-07-09 17:31:39,181 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 196 transitions. Word has length 18 [2021-07-09 17:31:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:39,181 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 196 transitions. [2021-07-09 17:31:39,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 196 transitions. [2021-07-09 17:31:39,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:39,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:39,182 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:39,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1243 [2021-07-09 17:31:39,382 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:39,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:39,382 INFO L82 PathProgramCache]: Analyzing trace with hash -23341270, now seen corresponding path program 208 times [2021-07-09 17:31:39,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:39,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614113353] [2021-07-09 17:31:39,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:39,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:39,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614113353] [2021-07-09 17:31:39,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614113353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:39,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249155229] [2021-07-09 17:31:39,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:39,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:39,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:39,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:39,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:39,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:39,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:39,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:39,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:39,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:39,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:39,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:39,787 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-07-09 17:31:39,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:39,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:39,790 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:39,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:39,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:39,797 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:31:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:39,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249155229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:39,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:39,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:31:39,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852054311] [2021-07-09 17:31:39,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:31:39,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:39,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:31:39,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:39,836 INFO L87 Difference]: Start difference. First operand 96 states and 196 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:40,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:40,047 INFO L93 Difference]: Finished difference Result 115 states and 225 transitions. [2021-07-09 17:31:40,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:31:40,047 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:40,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:40,047 INFO L225 Difference]: With dead ends: 115 [2021-07-09 17:31:40,047 INFO L226 Difference]: Without dead ends: 99 [2021-07-09 17:31:40,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 360.3ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-09 17:31:40,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2021-07-09 17:31:40,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0625) internal successors, (198), 96 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:40,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 198 transitions. [2021-07-09 17:31:40,049 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 198 transitions. Word has length 18 [2021-07-09 17:31:40,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:40,049 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 198 transitions. [2021-07-09 17:31:40,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:40,049 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 198 transitions. [2021-07-09 17:31:40,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:40,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:40,049 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:40,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1247 [2021-07-09 17:31:40,249 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:40,250 INFO L82 PathProgramCache]: Analyzing trace with hash 838663794, now seen corresponding path program 209 times [2021-07-09 17:31:40,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:40,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965232895] [2021-07-09 17:31:40,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:40,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:40,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965232895] [2021-07-09 17:31:40,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965232895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:40,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943487347] [2021-07-09 17:31:40,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:40,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:31:40,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:40,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:40,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:40,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:40,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:40,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:40,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:40,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:40,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,662 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-07-09 17:31:40,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:40,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:40,665 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:40,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:40,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,672 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:31:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:40,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943487347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:40,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:40,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:31:40,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642016203] [2021-07-09 17:31:40,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:31:40,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:40,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:31:40,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:40,712 INFO L87 Difference]: Start difference. First operand 97 states and 198 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:41,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:41,037 INFO L93 Difference]: Finished difference Result 117 states and 233 transitions. [2021-07-09 17:31:41,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:41,037 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:41,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:41,037 INFO L225 Difference]: With dead ends: 117 [2021-07-09 17:31:41,037 INFO L226 Difference]: Without dead ends: 104 [2021-07-09 17:31:41,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 410.1ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:31:41,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-09 17:31:41,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2021-07-09 17:31:41,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0618556701030926) internal successors, (200), 97 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:41,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 200 transitions. [2021-07-09 17:31:41,039 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 200 transitions. Word has length 18 [2021-07-09 17:31:41,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:41,039 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 200 transitions. [2021-07-09 17:31:41,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:41,039 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 200 transitions. [2021-07-09 17:31:41,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:41,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:41,039 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:41,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1251,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:41,240 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:41,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:41,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1974849066, now seen corresponding path program 210 times [2021-07-09 17:31:41,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:41,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989390024] [2021-07-09 17:31:41,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:41,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:41,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989390024] [2021-07-09 17:31:41,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989390024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:41,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066725919] [2021-07-09 17:31:41,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:41,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:31:41,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:41,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:31:41,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:41,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:41,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:41,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:41,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:41,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:41,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:41,640 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:41,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:41,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:41,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:41,662 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:41,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:41,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:41,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:41,683 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:41,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:41,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:41,701 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:31:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:41,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066725919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:41,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:41,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:31:41,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755534646] [2021-07-09 17:31:41,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:31:41,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:41,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:31:41,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:41,773 INFO L87 Difference]: Start difference. First operand 98 states and 200 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:42,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:42,135 INFO L93 Difference]: Finished difference Result 118 states and 239 transitions. [2021-07-09 17:31:42,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:42,135 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:42,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:42,136 INFO L225 Difference]: With dead ends: 118 [2021-07-09 17:31:42,136 INFO L226 Difference]: Without dead ends: 109 [2021-07-09 17:31:42,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 471.2ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:42,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-07-09 17:31:42,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2021-07-09 17:31:42,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0631578947368423) internal successors, (196), 95 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:42,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 196 transitions. [2021-07-09 17:31:42,137 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 196 transitions. Word has length 18 [2021-07-09 17:31:42,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:42,137 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 196 transitions. [2021-07-09 17:31:42,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:42,137 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 196 transitions. [2021-07-09 17:31:42,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:42,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:42,137 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:42,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1255,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:42,338 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:42,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:42,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1695884842, now seen corresponding path program 211 times [2021-07-09 17:31:42,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:42,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158431235] [2021-07-09 17:31:42,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:42,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:42,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158431235] [2021-07-09 17:31:42,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158431235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:42,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053546880] [2021-07-09 17:31:42,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:42,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:42,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:42,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:42,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:42,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:42,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:42,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:42,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:42,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:42,667 INFO L628 ElimStorePlain]: treesize reduction 34, result has 47.7 percent of original size [2021-07-09 17:31:42,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:42,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:31:42,669 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:42,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:42,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:42,676 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:31:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:42,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053546880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:42,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:42,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:31:42,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372513258] [2021-07-09 17:31:42,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:31:42,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:42,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:31:42,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:42,713 INFO L87 Difference]: Start difference. First operand 96 states and 196 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:42,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:42,872 INFO L93 Difference]: Finished difference Result 116 states and 227 transitions. [2021-07-09 17:31:42,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:42,872 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:42,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:42,873 INFO L225 Difference]: With dead ends: 116 [2021-07-09 17:31:42,873 INFO L226 Difference]: Without dead ends: 100 [2021-07-09 17:31:42,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 290.9ms TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:42,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-09 17:31:42,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2021-07-09 17:31:42,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0618556701030926) internal successors, (200), 97 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:42,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 200 transitions. [2021-07-09 17:31:42,874 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 200 transitions. Word has length 18 [2021-07-09 17:31:42,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:42,874 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 200 transitions. [2021-07-09 17:31:42,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:42,874 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 200 transitions. [2021-07-09 17:31:42,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:42,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:42,874 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:43,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1260,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:43,075 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:43,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:43,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1737077390, now seen corresponding path program 212 times [2021-07-09 17:31:43,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:43,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524163251] [2021-07-09 17:31:43,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:43,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:43,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524163251] [2021-07-09 17:31:43,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524163251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:43,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146738729] [2021-07-09 17:31:43,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:43,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:43,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:43,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:31:43,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:43,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:43,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:43,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:43,414 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:43,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:43,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,420 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-07-09 17:31:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:43,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146738729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:43,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:43,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:31:43,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778640436] [2021-07-09 17:31:43,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:31:43,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:43,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:31:43,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:43,457 INFO L87 Difference]: Start difference. First operand 98 states and 200 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:43,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:43,787 INFO L93 Difference]: Finished difference Result 118 states and 238 transitions. [2021-07-09 17:31:43,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:43,787 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:43,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:43,787 INFO L225 Difference]: With dead ends: 118 [2021-07-09 17:31:43,787 INFO L226 Difference]: Without dead ends: 111 [2021-07-09 17:31:43,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 397.6ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:43,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-09 17:31:43,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2021-07-09 17:31:43,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 98 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:43,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 203 transitions. [2021-07-09 17:31:43,789 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 203 transitions. Word has length 18 [2021-07-09 17:31:43,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:43,789 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 203 transitions. [2021-07-09 17:31:43,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:43,789 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 203 transitions. [2021-07-09 17:31:43,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:43,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:43,789 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:43,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1263,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:43,990 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:43,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:43,990 INFO L82 PathProgramCache]: Analyzing trace with hash -600892118, now seen corresponding path program 213 times [2021-07-09 17:31:43,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:43,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109168969] [2021-07-09 17:31:43,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:43,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:44,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:44,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109168969] [2021-07-09 17:31:44,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109168969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:44,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659181091] [2021-07-09 17:31:44,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:44,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:31:44,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:44,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:31:44,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:44,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:44,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:44,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:44,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:44,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:44,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:44,376 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:44,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:44,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:44,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:44,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:44,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:44,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:44,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:44,421 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:44,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:44,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:44,439 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:31:44,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:44,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659181091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:44,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:44,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:31:44,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416013256] [2021-07-09 17:31:44,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:31:44,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:44,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:31:44,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:44,514 INFO L87 Difference]: Start difference. First operand 99 states and 203 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:45,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:45,037 INFO L93 Difference]: Finished difference Result 145 states and 280 transitions. [2021-07-09 17:31:45,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:31:45,037 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:45,037 INFO L225 Difference]: With dead ends: 145 [2021-07-09 17:31:45,037 INFO L226 Difference]: Without dead ends: 129 [2021-07-09 17:31:45,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 612.9ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:31:45,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-07-09 17:31:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 100. [2021-07-09 17:31:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.080808080808081) internal successors, (206), 99 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 206 transitions. [2021-07-09 17:31:45,039 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 206 transitions. Word has length 18 [2021-07-09 17:31:45,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:45,039 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 206 transitions. [2021-07-09 17:31:45,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:45,039 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 206 transitions. [2021-07-09 17:31:45,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:45,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:45,039 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:45,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1267 [2021-07-09 17:31:45,240 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:45,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:45,240 INFO L82 PathProgramCache]: Analyzing trace with hash -434692494, now seen corresponding path program 214 times [2021-07-09 17:31:45,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:45,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864820265] [2021-07-09 17:31:45,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:45,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:45,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864820265] [2021-07-09 17:31:45,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864820265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:45,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889983829] [2021-07-09 17:31:45,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:45,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:45,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:45,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:45,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:45,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:45,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:45,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:45,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:45,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:45,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:45,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:45,549 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-07-09 17:31:45,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:45,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:45,552 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:45,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:45,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:45,561 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:31:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:45,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889983829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:45,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:45,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:31:45,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474522571] [2021-07-09 17:31:45,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:31:45,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:45,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:31:45,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:45,596 INFO L87 Difference]: Start difference. First operand 100 states and 206 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:45,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:45,878 INFO L93 Difference]: Finished difference Result 124 states and 249 transitions. [2021-07-09 17:31:45,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:45,879 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:45,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:45,879 INFO L225 Difference]: With dead ends: 124 [2021-07-09 17:31:45,879 INFO L226 Difference]: Without dead ends: 111 [2021-07-09 17:31:45,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 339.9ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:45,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-09 17:31:45,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2021-07-09 17:31:45,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.076923076923077) internal successors, (216), 104 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 216 transitions. [2021-07-09 17:31:45,880 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 216 transitions. Word has length 18 [2021-07-09 17:31:45,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:45,880 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 216 transitions. [2021-07-09 17:31:45,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:45,880 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 216 transitions. [2021-07-09 17:31:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:45,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:45,881 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:46,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1272,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:46,081 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:46,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:46,081 INFO L82 PathProgramCache]: Analyzing trace with hash 701492778, now seen corresponding path program 215 times [2021-07-09 17:31:46,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:46,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023556479] [2021-07-09 17:31:46,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:46,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:46,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023556479] [2021-07-09 17:31:46,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023556479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:46,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504584473] [2021-07-09 17:31:46,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:46,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:31:46,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:46,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:46,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:46,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:46,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:46,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:46,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:46,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:46,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,461 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:31:46,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:46,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:46,465 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:46,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:46,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:46,492 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:46,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:46,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:46,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:46,516 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:46,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:46,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:46,539 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:31:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:46,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504584473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:46,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:46,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:31:46,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502021723] [2021-07-09 17:31:46,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:31:46,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:46,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:31:46,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:46,625 INFO L87 Difference]: Start difference. First operand 105 states and 216 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:47,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:47,046 INFO L93 Difference]: Finished difference Result 146 states and 282 transitions. [2021-07-09 17:31:47,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:31:47,046 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:47,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:47,047 INFO L225 Difference]: With dead ends: 146 [2021-07-09 17:31:47,047 INFO L226 Difference]: Without dead ends: 127 [2021-07-09 17:31:47,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 477.9ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:31:47,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-09 17:31:47,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2021-07-09 17:31:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 103 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:47,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 214 transitions. [2021-07-09 17:31:47,048 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 214 transitions. Word has length 18 [2021-07-09 17:31:47,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:47,048 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 214 transitions. [2021-07-09 17:31:47,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 214 transitions. [2021-07-09 17:31:47,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:47,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:47,048 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:47,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1276 [2021-07-09 17:31:47,249 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:47,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:47,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1444677982, now seen corresponding path program 216 times [2021-07-09 17:31:47,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:47,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653459867] [2021-07-09 17:31:47,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:47,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:47,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653459867] [2021-07-09 17:31:47,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653459867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:47,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878236401] [2021-07-09 17:31:47,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:47,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:31:47,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:47,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:31:47,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:47,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:47,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:47,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:47,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:47,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:47,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:47,543 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:47,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:47,546 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:47,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:47,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:47,571 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:31:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:47,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878236401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:47,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:47,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:31:47,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154762958] [2021-07-09 17:31:47,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:31:47,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:47,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:31:47,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:47,639 INFO L87 Difference]: Start difference. First operand 104 states and 214 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:48,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:48,321 INFO L93 Difference]: Finished difference Result 170 states and 330 transitions. [2021-07-09 17:31:48,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:31:48,321 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:48,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:48,321 INFO L225 Difference]: With dead ends: 170 [2021-07-09 17:31:48,321 INFO L226 Difference]: Without dead ends: 147 [2021-07-09 17:31:48,322 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 705.1ms TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:31:48,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-09 17:31:48,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 103. [2021-07-09 17:31:48,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 102 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:48,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 212 transitions. [2021-07-09 17:31:48,323 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 212 transitions. Word has length 18 [2021-07-09 17:31:48,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:48,323 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 212 transitions. [2021-07-09 17:31:48,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:48,323 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 212 transitions. [2021-07-09 17:31:48,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:48,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:48,323 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:48,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1281 [2021-07-09 17:31:48,539 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:48,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:48,540 INFO L82 PathProgramCache]: Analyzing trace with hash 743505194, now seen corresponding path program 217 times [2021-07-09 17:31:48,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:48,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337356499] [2021-07-09 17:31:48,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:48,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:48,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337356499] [2021-07-09 17:31:48,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337356499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:48,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238669628] [2021-07-09 17:31:48,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:48,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:48,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:48,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:48,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:48,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:48,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:48,861 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,911 INFO L628 ElimStorePlain]: treesize reduction 90, result has 38.8 percent of original size [2021-07-09 17:31:48,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:48,916 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:48,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:48,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:48,938 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:173, output treesize:36 [2021-07-09 17:31:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:49,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238669628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:49,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:49,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:31:49,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977324720] [2021-07-09 17:31:49,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:31:49,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:49,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:31:49,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:49,012 INFO L87 Difference]: Start difference. First operand 103 states and 212 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:49,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:49,641 INFO L93 Difference]: Finished difference Result 157 states and 309 transitions. [2021-07-09 17:31:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:31:49,642 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:49,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:49,642 INFO L225 Difference]: With dead ends: 157 [2021-07-09 17:31:49,642 INFO L226 Difference]: Without dead ends: 138 [2021-07-09 17:31:49,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 669.6ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:31:49,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-09 17:31:49,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 106. [2021-07-09 17:31:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:49,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 220 transitions. [2021-07-09 17:31:49,643 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 220 transitions. Word has length 18 [2021-07-09 17:31:49,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:49,644 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 220 transitions. [2021-07-09 17:31:49,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:49,644 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 220 transitions. [2021-07-09 17:31:49,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:49,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:49,644 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:49,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1284,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:49,844 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:49,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:49,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1244440906, now seen corresponding path program 218 times [2021-07-09 17:31:49,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:49,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108978938] [2021-07-09 17:31:49,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:50,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:50,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108978938] [2021-07-09 17:31:50,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108978938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:50,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088578222] [2021-07-09 17:31:50,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:50,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:50,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:50,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:50,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:50,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:50,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:50,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:50,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:50,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:50,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:50,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:50,281 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-07-09 17:31:50,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:50,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:50,290 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:50,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:50,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:50,299 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:31:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:50,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088578222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:50,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:50,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:31:50,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779605094] [2021-07-09 17:31:50,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:31:50,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:50,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:31:50,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:50,347 INFO L87 Difference]: Start difference. First operand 106 states and 220 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:50,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:50,526 INFO L93 Difference]: Finished difference Result 128 states and 254 transitions. [2021-07-09 17:31:50,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:31:50,526 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:50,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:50,526 INFO L225 Difference]: With dead ends: 128 [2021-07-09 17:31:50,526 INFO L226 Difference]: Without dead ends: 109 [2021-07-09 17:31:50,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 371.8ms TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:50,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-07-09 17:31:50,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-07-09 17:31:50,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0943396226415096) internal successors, (222), 106 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:50,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 222 transitions. [2021-07-09 17:31:50,528 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 222 transitions. Word has length 18 [2021-07-09 17:31:50,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:50,528 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 222 transitions. [2021-07-09 17:31:50,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:50,528 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 222 transitions. [2021-07-09 17:31:50,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:50,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:50,528 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:50,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1287 [2021-07-09 17:31:50,729 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:50,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:50,729 INFO L82 PathProgramCache]: Analyzing trace with hash -292087698, now seen corresponding path program 219 times [2021-07-09 17:31:50,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:50,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935786963] [2021-07-09 17:31:50,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:50,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:50,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:50,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935786963] [2021-07-09 17:31:50,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935786963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:50,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829679380] [2021-07-09 17:31:50,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:50,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:31:50,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:50,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:50,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:51,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:51,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:51,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:51,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:51,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:51,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:51,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:51,121 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-07-09 17:31:51,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:51,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:51,124 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:51,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:51,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:51,131 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:31:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:51,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829679380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:51,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:51,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:31:51,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326056029] [2021-07-09 17:31:51,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:31:51,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:51,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:31:51,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:51,172 INFO L87 Difference]: Start difference. First operand 107 states and 222 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:51,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:51,350 INFO L93 Difference]: Finished difference Result 126 states and 251 transitions. [2021-07-09 17:31:51,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:31:51,350 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:51,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:51,350 INFO L225 Difference]: With dead ends: 126 [2021-07-09 17:31:51,350 INFO L226 Difference]: Without dead ends: 110 [2021-07-09 17:31:51,351 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 361.9ms TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:31:51,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-07-09 17:31:51,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2021-07-09 17:31:51,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0934579439252334) internal successors, (224), 107 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:51,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 224 transitions. [2021-07-09 17:31:51,352 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 224 transitions. Word has length 18 [2021-07-09 17:31:51,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:51,352 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 224 transitions. [2021-07-09 17:31:51,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:51,352 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 224 transitions. [2021-07-09 17:31:51,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:51,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:51,352 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:51,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:51,553 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:51,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:51,553 INFO L82 PathProgramCache]: Analyzing trace with hash 569917366, now seen corresponding path program 220 times [2021-07-09 17:31:51,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:51,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652891226] [2021-07-09 17:31:51,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:51,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:51,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:51,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652891226] [2021-07-09 17:31:51,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652891226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:51,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770889275] [2021-07-09 17:31:51,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:51,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:51,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:51,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:51,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:51,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:51,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:51,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:51,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:51,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:51,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:51,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:52,007 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-07-09 17:31:52,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:52,010 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:52,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:52,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:52,017 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:31:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:52,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770889275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:52,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:52,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:31:52,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895975262] [2021-07-09 17:31:52,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:31:52,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:52,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:31:52,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:52,060 INFO L87 Difference]: Start difference. First operand 108 states and 224 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:52,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:52,391 INFO L93 Difference]: Finished difference Result 127 states and 257 transitions. [2021-07-09 17:31:52,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:52,392 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:52,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:52,392 INFO L225 Difference]: With dead ends: 127 [2021-07-09 17:31:52,392 INFO L226 Difference]: Without dead ends: 114 [2021-07-09 17:31:52,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 462.4ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:52,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-07-09 17:31:52,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2021-07-09 17:31:52,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:52,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-07-09 17:31:52,394 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 18 [2021-07-09 17:31:52,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:52,394 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-07-09 17:31:52,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:52,394 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-07-09 17:31:52,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:52,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:52,394 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:52,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1295,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:52,605 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:52,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:52,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1706102638, now seen corresponding path program 221 times [2021-07-09 17:31:52,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:52,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300391964] [2021-07-09 17:31:52,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:52,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:52,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300391964] [2021-07-09 17:31:52,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300391964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:52,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100742546] [2021-07-09 17:31:52,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:52,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:31:52,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:52,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:52,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:52,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:52,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:53,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:53,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:53,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:53,058 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:31:53,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:53,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:53,062 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:53,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:53,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:53,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:53,088 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:53,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:53,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:53,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:53,111 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:53,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:53,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:53,133 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:31:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:53,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100742546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:53,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:53,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:31:53,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336115076] [2021-07-09 17:31:53,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:31:53,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:53,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:31:53,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:53,213 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:53,930 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-07-09 17:31:54,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:54,485 INFO L93 Difference]: Finished difference Result 253 states and 456 transitions. [2021-07-09 17:31:54,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:31:54,486 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:54,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:54,486 INFO L225 Difference]: With dead ends: 253 [2021-07-09 17:31:54,486 INFO L226 Difference]: Without dead ends: 213 [2021-07-09 17:31:54,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1365.5ms TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:31:54,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-09 17:31:54,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 113. [2021-07-09 17:31:54,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.142857142857143) internal successors, (240), 112 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:54,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 240 transitions. [2021-07-09 17:31:54,488 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 240 transitions. Word has length 18 [2021-07-09 17:31:54,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:54,488 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 240 transitions. [2021-07-09 17:31:54,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:54,488 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 240 transitions. [2021-07-09 17:31:54,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:54,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:54,488 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:54,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1299 [2021-07-09 17:31:54,689 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:54,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:54,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1177885978, now seen corresponding path program 222 times [2021-07-09 17:31:54,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:54,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384033062] [2021-07-09 17:31:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:54,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:54,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384033062] [2021-07-09 17:31:54,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384033062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:54,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019955815] [2021-07-09 17:31:54,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:54,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:31:54,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:54,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:31:54,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:55,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:55,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:55,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:55,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:55,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:55,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:55,022 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:55,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:55,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:55,029 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-07-09 17:31:55,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:55,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019955815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:55,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:55,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:31:55,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299561559] [2021-07-09 17:31:55,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:31:55,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:55,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:31:55,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:55,062 INFO L87 Difference]: Start difference. First operand 113 states and 240 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:55,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:55,256 INFO L93 Difference]: Finished difference Result 132 states and 272 transitions. [2021-07-09 17:31:55,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:31:55,257 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:55,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:55,257 INFO L225 Difference]: With dead ends: 132 [2021-07-09 17:31:55,257 INFO L226 Difference]: Without dead ends: 125 [2021-07-09 17:31:55,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 307.3ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:55,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-07-09 17:31:55,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 114. [2021-07-09 17:31:55,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.150442477876106) internal successors, (243), 113 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:55,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 243 transitions. [2021-07-09 17:31:55,259 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 243 transitions. Word has length 18 [2021-07-09 17:31:55,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:55,259 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 243 transitions. [2021-07-09 17:31:55,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:55,259 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 243 transitions. [2021-07-09 17:31:55,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:55,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:55,259 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:55,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1304,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:55,459 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:55,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:55,460 INFO L82 PathProgramCache]: Analyzing trace with hash -315880914, now seen corresponding path program 223 times [2021-07-09 17:31:55,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:55,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733380096] [2021-07-09 17:31:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:55,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:55,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733380096] [2021-07-09 17:31:55,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733380096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:55,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639245725] [2021-07-09 17:31:55,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:55,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:55,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:55,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:55,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:55,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:55,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:55,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:55,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:55,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:55,887 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-07-09 17:31:55,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:55,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:55,890 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:55,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:55,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:55,897 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:31:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:55,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639245725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:55,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:55,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:31:55,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537452128] [2021-07-09 17:31:55,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:31:55,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:55,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:31:55,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:55,932 INFO L87 Difference]: Start difference. First operand 114 states and 243 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:56,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:56,252 INFO L93 Difference]: Finished difference Result 142 states and 291 transitions. [2021-07-09 17:31:56,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:56,252 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:56,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:56,253 INFO L225 Difference]: With dead ends: 142 [2021-07-09 17:31:56,253 INFO L226 Difference]: Without dead ends: 129 [2021-07-09 17:31:56,253 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 446.6ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:56,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-07-09 17:31:56,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 115. [2021-07-09 17:31:56,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1491228070175437) internal successors, (245), 114 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:56,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 245 transitions. [2021-07-09 17:31:56,254 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 245 transitions. Word has length 18 [2021-07-09 17:31:56,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:56,254 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 245 transitions. [2021-07-09 17:31:56,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:56,255 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 245 transitions. [2021-07-09 17:31:56,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:56,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:56,255 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:56,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1307 [2021-07-09 17:31:56,455 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:56,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:56,455 INFO L82 PathProgramCache]: Analyzing trace with hash 820304358, now seen corresponding path program 224 times [2021-07-09 17:31:56,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:56,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048729101] [2021-07-09 17:31:56,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:56,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:56,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048729101] [2021-07-09 17:31:56,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048729101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:56,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265369429] [2021-07-09 17:31:56,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:56,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:56,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:56,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:56,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:56,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:56,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:56,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:56,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:56,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:56,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:56,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:56,850 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:31:56,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:56,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:56,854 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:56,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:56,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:56,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:56,879 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:56,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:56,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:56,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:56,903 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:56,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:56,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:56,924 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:31:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:56,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265369429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:56,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:56,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:31:56,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839829697] [2021-07-09 17:31:56,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:31:56,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:56,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:31:56,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:56,998 INFO L87 Difference]: Start difference. First operand 115 states and 245 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:57,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:57,331 INFO L93 Difference]: Finished difference Result 163 states and 322 transitions. [2021-07-09 17:31:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:57,331 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:57,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:57,331 INFO L225 Difference]: With dead ends: 163 [2021-07-09 17:31:57,331 INFO L226 Difference]: Without dead ends: 144 [2021-07-09 17:31:57,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 478.7ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:57,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-09 17:31:57,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 114. [2021-07-09 17:31:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.150442477876106) internal successors, (243), 113 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 243 transitions. [2021-07-09 17:31:57,333 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 243 transitions. Word has length 18 [2021-07-09 17:31:57,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:57,333 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 243 transitions. [2021-07-09 17:31:57,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:57,333 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 243 transitions. [2021-07-09 17:31:57,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:57,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:57,333 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:57,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1311 [2021-07-09 17:31:57,534 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:57,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:57,534 INFO L82 PathProgramCache]: Analyzing trace with hash 578515942, now seen corresponding path program 225 times [2021-07-09 17:31:57,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:57,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847466568] [2021-07-09 17:31:57,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:57,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:57,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847466568] [2021-07-09 17:31:57,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847466568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:57,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378983425] [2021-07-09 17:31:57,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:57,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:31:57,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:57,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:31:57,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:57,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:57,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:57,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:57,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:57,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:57,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:57,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:57,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:57,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:57,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:57,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:31:57,865 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:57,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:57,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:57,868 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:57,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:57,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:57,884 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:29 [2021-07-09 17:31:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:57,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378983425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:57,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:57,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:31:57,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846981064] [2021-07-09 17:31:57,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:31:57,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:57,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:31:57,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:57,934 INFO L87 Difference]: Start difference. First operand 114 states and 243 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:58,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:58,238 INFO L93 Difference]: Finished difference Result 138 states and 286 transitions. [2021-07-09 17:31:58,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:58,239 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:58,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:58,239 INFO L225 Difference]: With dead ends: 138 [2021-07-09 17:31:58,239 INFO L226 Difference]: Without dead ends: 122 [2021-07-09 17:31:58,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 355.0ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:58,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-07-09 17:31:58,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2021-07-09 17:31:58,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:58,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 247 transitions. [2021-07-09 17:31:58,241 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 247 transitions. Word has length 18 [2021-07-09 17:31:58,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:58,241 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 247 transitions. [2021-07-09 17:31:58,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:58,241 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 247 transitions. [2021-07-09 17:31:58,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:58,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:58,241 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:58,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1316 [2021-07-09 17:31:58,442 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:58,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:58,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1440521006, now seen corresponding path program 226 times [2021-07-09 17:31:58,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:58,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699634593] [2021-07-09 17:31:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:58,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:58,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699634593] [2021-07-09 17:31:58,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699634593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:58,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229675596] [2021-07-09 17:31:58,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:58,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:58,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:58,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:58,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:58,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:58,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:58,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:58,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:58,841 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-07-09 17:31:58,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:58,844 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:58,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:58,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:58,853 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:31:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:58,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229675596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:58,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:58,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:31:58,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657383046] [2021-07-09 17:31:58,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:31:58,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:58,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:31:58,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:58,888 INFO L87 Difference]: Start difference. First operand 116 states and 247 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:59,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:59,196 INFO L93 Difference]: Finished difference Result 135 states and 280 transitions. [2021-07-09 17:31:59,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:31:59,196 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:59,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:59,197 INFO L225 Difference]: With dead ends: 135 [2021-07-09 17:31:59,197 INFO L226 Difference]: Without dead ends: 122 [2021-07-09 17:31:59,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 393.5ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:59,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-07-09 17:31:59,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2021-07-09 17:31:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.146551724137931) internal successors, (249), 116 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-07-09 17:31:59,198 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 18 [2021-07-09 17:31:59,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:59,198 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-07-09 17:31:59,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:59,198 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-07-09 17:31:59,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:59,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:59,198 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:59,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1322 [2021-07-09 17:31:59,399 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:59,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:59,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1718261018, now seen corresponding path program 227 times [2021-07-09 17:31:59,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:59,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834912100] [2021-07-09 17:31:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:59,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:59,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834912100] [2021-07-09 17:31:59,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834912100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:59,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775549722] [2021-07-09 17:31:59,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:59,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:31:59,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:59,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:31:59,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:59,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:59,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:59,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:59,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:59,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:59,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:59,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:59,827 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:31:59,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:59,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:59,831 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:59,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:59,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:59,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:59,857 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:59,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:59,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:59,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:31:59,880 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:31:59,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:59,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:59,900 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:31:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:59,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775549722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:59,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:59,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:31:59,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73402314] [2021-07-09 17:31:59,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:31:59,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:59,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:31:59,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:59,974 INFO L87 Difference]: Start difference. First operand 117 states and 249 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:00,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:00,233 INFO L93 Difference]: Finished difference Result 135 states and 278 transitions. [2021-07-09 17:32:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:00,234 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:00,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:00,234 INFO L225 Difference]: With dead ends: 135 [2021-07-09 17:32:00,234 INFO L226 Difference]: Without dead ends: 123 [2021-07-09 17:32:00,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 420.3ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:00,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-09 17:32:00,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2021-07-09 17:32:00,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1452991452991452) internal successors, (251), 117 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 251 transitions. [2021-07-09 17:32:00,236 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 251 transitions. Word has length 18 [2021-07-09 17:32:00,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:00,236 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 251 transitions. [2021-07-09 17:32:00,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:00,236 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 251 transitions. [2021-07-09 17:32:00,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:00,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:00,236 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:00,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1326,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:00,437 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:00,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:00,437 INFO L82 PathProgramCache]: Analyzing trace with hash -666263114, now seen corresponding path program 228 times [2021-07-09 17:32:00,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:00,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298735844] [2021-07-09 17:32:00,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:00,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:00,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298735844] [2021-07-09 17:32:00,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298735844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:00,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842352208] [2021-07-09 17:32:00,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:00,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:32:00,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:00,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:00,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:00,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:00,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:00,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:00,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:00,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:00,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:00,768 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:00,788 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-07-09 17:32:00,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:00,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:00,791 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:00,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:00,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:00,798 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:32:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:00,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842352208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:00,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:00,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:00,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939100238] [2021-07-09 17:32:00,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:00,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:00,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:00,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:00,836 INFO L87 Difference]: Start difference. First operand 118 states and 251 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:01,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:01,113 INFO L93 Difference]: Finished difference Result 140 states and 290 transitions. [2021-07-09 17:32:01,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:01,113 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:01,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:01,113 INFO L225 Difference]: With dead ends: 140 [2021-07-09 17:32:01,113 INFO L226 Difference]: Without dead ends: 127 [2021-07-09 17:32:01,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 380.9ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:01,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-09 17:32:01,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2021-07-09 17:32:01,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.142857142857143) internal successors, (255), 119 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:01,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 255 transitions. [2021-07-09 17:32:01,115 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 255 transitions. Word has length 18 [2021-07-09 17:32:01,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:01,115 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 255 transitions. [2021-07-09 17:32:01,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:01,115 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 255 transitions. [2021-07-09 17:32:01,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:01,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:01,115 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:01,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1331 [2021-07-09 17:32:01,316 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:01,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:01,316 INFO L82 PathProgramCache]: Analyzing trace with hash 469922158, now seen corresponding path program 229 times [2021-07-09 17:32:01,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:01,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385118915] [2021-07-09 17:32:01,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:01,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:01,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385118915] [2021-07-09 17:32:01,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385118915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:01,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765351642] [2021-07-09 17:32:01,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:01,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:01,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:01,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:01,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:01,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:01,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:01,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:01,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:01,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:01,678 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:32:01,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:01,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:01,682 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:01,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:01,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:01,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:01,707 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:01,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:01,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:01,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:01,731 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:01,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:01,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:01,752 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:01,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765351642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:01,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:01,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:01,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576598349] [2021-07-09 17:32:01,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:01,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:01,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:01,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:01,821 INFO L87 Difference]: Start difference. First operand 120 states and 255 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:02,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:02,124 INFO L93 Difference]: Finished difference Result 138 states and 284 transitions. [2021-07-09 17:32:02,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:02,125 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:02,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:02,125 INFO L225 Difference]: With dead ends: 138 [2021-07-09 17:32:02,125 INFO L226 Difference]: Without dead ends: 126 [2021-07-09 17:32:02,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 419.1ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:02,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-09 17:32:02,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2021-07-09 17:32:02,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1440677966101696) internal successors, (253), 118 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:02,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 253 transitions. [2021-07-09 17:32:02,126 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 253 transitions. Word has length 18 [2021-07-09 17:32:02,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:02,126 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 253 transitions. [2021-07-09 17:32:02,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 253 transitions. [2021-07-09 17:32:02,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:02,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:02,127 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:02,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1335 [2021-07-09 17:32:02,327 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:02,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:02,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1676248602, now seen corresponding path program 230 times [2021-07-09 17:32:02,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:02,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142755570] [2021-07-09 17:32:02,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:02,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:02,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142755570] [2021-07-09 17:32:02,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142755570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:02,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249362610] [2021-07-09 17:32:02,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:02,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:02,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:02,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:32:02,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:02,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:02,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:02,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:02,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:02,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:02,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:02,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:02,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:02,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:02,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:02,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:02,609 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:02,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:02,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:02,613 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:02,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:02,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:02,632 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:32:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:02,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249362610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:02,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:02,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:02,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055849264] [2021-07-09 17:32:02,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:02,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:02,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:02,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:02,709 INFO L87 Difference]: Start difference. First operand 119 states and 253 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:03,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:03,103 INFO L93 Difference]: Finished difference Result 147 states and 310 transitions. [2021-07-09 17:32:03,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:03,103 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:03,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:03,103 INFO L225 Difference]: With dead ends: 147 [2021-07-09 17:32:03,104 INFO L226 Difference]: Without dead ends: 138 [2021-07-09 17:32:03,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 442.3ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:32:03,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-09 17:32:03,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 120. [2021-07-09 17:32:03,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1512605042016806) internal successors, (256), 119 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:03,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 256 transitions. [2021-07-09 17:32:03,105 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 256 transitions. Word has length 18 [2021-07-09 17:32:03,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:03,105 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 256 transitions. [2021-07-09 17:32:03,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:03,105 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 256 transitions. [2021-07-09 17:32:03,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:03,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:03,105 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:03,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1340,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:03,306 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:03,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:03,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1052962998, now seen corresponding path program 231 times [2021-07-09 17:32:03,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:03,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074625706] [2021-07-09 17:32:03,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:03,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:03,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074625706] [2021-07-09 17:32:03,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074625706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:03,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654435380] [2021-07-09 17:32:03,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:03,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:32:03,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:03,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:32:03,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:03,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:03,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:03,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:03,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:03,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:03,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:03,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:03,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:03,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:03,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:03,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:03,647 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:03,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:03,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:03,650 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:03,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:03,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:03,667 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:29 [2021-07-09 17:32:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:03,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654435380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:03,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:03,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:03,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435356967] [2021-07-09 17:32:03,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:03,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:03,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:03,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:03,715 INFO L87 Difference]: Start difference. First operand 120 states and 256 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:03,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:03,930 INFO L93 Difference]: Finished difference Result 142 states and 295 transitions. [2021-07-09 17:32:03,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:03,931 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:03,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:03,931 INFO L225 Difference]: With dead ends: 142 [2021-07-09 17:32:03,931 INFO L226 Difference]: Without dead ends: 129 [2021-07-09 17:32:03,931 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 336.1ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-07-09 17:32:03,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-07-09 17:32:03,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.1463414634146343) internal successors, (264), 123 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:03,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 264 transitions. [2021-07-09 17:32:03,933 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 264 transitions. Word has length 18 [2021-07-09 17:32:03,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:03,933 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 264 transitions. [2021-07-09 17:32:03,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:03,933 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 264 transitions. [2021-07-09 17:32:03,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:03,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:03,933 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:04,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1343 [2021-07-09 17:32:04,145 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:04,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:04,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2105819026, now seen corresponding path program 232 times [2021-07-09 17:32:04,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:04,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357991909] [2021-07-09 17:32:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:04,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:04,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357991909] [2021-07-09 17:32:04,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357991909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:04,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071817193] [2021-07-09 17:32:04,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:04,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:04,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:04,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:04,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:04,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:04,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:04,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:04,477 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:04,537 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:32:04,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:04,541 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:04,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:04,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:04,567 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:04,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:04,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:04,592 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:04,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:04,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:04,612 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:04,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071817193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:04,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:04,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:04,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141493313] [2021-07-09 17:32:04,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:04,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:04,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:04,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:04,692 INFO L87 Difference]: Start difference. First operand 124 states and 264 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:05,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:05,006 INFO L93 Difference]: Finished difference Result 162 states and 324 transitions. [2021-07-09 17:32:05,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:05,006 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:05,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:05,006 INFO L225 Difference]: With dead ends: 162 [2021-07-09 17:32:05,006 INFO L226 Difference]: Without dead ends: 143 [2021-07-09 17:32:05,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 440.2ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:05,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-09 17:32:05,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 123. [2021-07-09 17:32:05,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.1475409836065573) internal successors, (262), 122 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:05,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 262 transitions. [2021-07-09 17:32:05,010 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 262 transitions. Word has length 18 [2021-07-09 17:32:05,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:05,010 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 262 transitions. [2021-07-09 17:32:05,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:05,010 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 262 transitions. [2021-07-09 17:32:05,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:05,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:05,010 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:05,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1349 [2021-07-09 17:32:05,211 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:05,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:05,211 INFO L82 PathProgramCache]: Analyzing trace with hash 42977510, now seen corresponding path program 233 times [2021-07-09 17:32:05,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:05,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237624014] [2021-07-09 17:32:05,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:05,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:05,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237624014] [2021-07-09 17:32:05,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237624014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:05,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63652574] [2021-07-09 17:32:05,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:05,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:32:05,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:05,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:05,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:05,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:05,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:05,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:05,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:05,510 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,564 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-07-09 17:32:05,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:05,569 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:05,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:05,572 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:05,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:05,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:05,595 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:05,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63652574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:05,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:05,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:05,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358171186] [2021-07-09 17:32:05,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:05,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:05,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:05,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:05,664 INFO L87 Difference]: Start difference. First operand 123 states and 262 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:05,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:05,963 INFO L93 Difference]: Finished difference Result 172 states and 349 transitions. [2021-07-09 17:32:05,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:32:05,963 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:05,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:05,964 INFO L225 Difference]: With dead ends: 172 [2021-07-09 17:32:05,964 INFO L226 Difference]: Without dead ends: 153 [2021-07-09 17:32:05,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 437.5ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:05,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-09 17:32:05,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 123. [2021-07-09 17:32:05,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.1475409836065573) internal successors, (262), 122 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:05,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 262 transitions. [2021-07-09 17:32:05,965 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 262 transitions. Word has length 18 [2021-07-09 17:32:05,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:05,965 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 262 transitions. [2021-07-09 17:32:05,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:05,965 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 262 transitions. [2021-07-09 17:32:05,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:05,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:05,966 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:06,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1354 [2021-07-09 17:32:06,166 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:06,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:06,166 INFO L82 PathProgramCache]: Analyzing trace with hash -2063806610, now seen corresponding path program 234 times [2021-07-09 17:32:06,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:06,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7453437] [2021-07-09 17:32:06,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:06,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:06,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7453437] [2021-07-09 17:32:06,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7453437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:06,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607872328] [2021-07-09 17:32:06,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:06,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:32:06,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:06,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:32:06,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:06,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:06,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:06,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:06,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:06,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:06,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:06,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:06,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:06,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:06,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:06,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:06,520 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:06,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:06,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:06,523 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:06,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:06,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:06,543 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:32:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:06,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607872328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:06,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:06,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:06,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031823194] [2021-07-09 17:32:06,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:06,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:06,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:06,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:06,625 INFO L87 Difference]: Start difference. First operand 123 states and 262 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:06,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:06,935 INFO L93 Difference]: Finished difference Result 153 states and 315 transitions. [2021-07-09 17:32:06,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:32:06,935 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:06,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:06,936 INFO L225 Difference]: With dead ends: 153 [2021-07-09 17:32:06,936 INFO L226 Difference]: Without dead ends: 139 [2021-07-09 17:32:06,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 462.4ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:06,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-07-09 17:32:06,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 126. [2021-07-09 17:32:06,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.176) internal successors, (272), 125 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:06,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 272 transitions. [2021-07-09 17:32:06,937 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 272 transitions. Word has length 18 [2021-07-09 17:32:06,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:06,938 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 272 transitions. [2021-07-09 17:32:06,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:06,938 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 272 transitions. [2021-07-09 17:32:06,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:06,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:06,938 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:07,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1357 [2021-07-09 17:32:07,138 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:07,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:07,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1345362406, now seen corresponding path program 235 times [2021-07-09 17:32:07,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:07,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278776779] [2021-07-09 17:32:07,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:07,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:07,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278776779] [2021-07-09 17:32:07,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278776779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:07,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035839581] [2021-07-09 17:32:07,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:07,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:07,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:07,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:07,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:07,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:07,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:07,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:07,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:07,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:07,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:07,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:07,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:07,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:07,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:07,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:07,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:07,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:07,509 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-07-09 17:32:07,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:07,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:07,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:07,513 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:07,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:07,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:07,517 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:07,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:07,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:07,540 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:07,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035839581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:07,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:07,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:07,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426539011] [2021-07-09 17:32:07,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:07,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:07,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:07,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:07,611 INFO L87 Difference]: Start difference. First operand 126 states and 272 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:07,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:07,886 INFO L93 Difference]: Finished difference Result 157 states and 332 transitions. [2021-07-09 17:32:07,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:07,887 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:07,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:07,887 INFO L225 Difference]: With dead ends: 157 [2021-07-09 17:32:07,887 INFO L226 Difference]: Without dead ends: 145 [2021-07-09 17:32:07,887 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 393.4ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:07,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-09 17:32:07,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 131. [2021-07-09 17:32:07,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1846153846153844) internal successors, (284), 130 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 284 transitions. [2021-07-09 17:32:07,889 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 284 transitions. Word has length 18 [2021-07-09 17:32:07,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:07,889 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 284 transitions. [2021-07-09 17:32:07,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:07,889 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 284 transitions. [2021-07-09 17:32:07,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:07,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:07,889 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:08,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1362,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:08,090 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:08,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:08,090 INFO L82 PathProgramCache]: Analyzing trace with hash -726850258, now seen corresponding path program 236 times [2021-07-09 17:32:08,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:08,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726031960] [2021-07-09 17:32:08,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:08,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:08,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726031960] [2021-07-09 17:32:08,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726031960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:08,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064659799] [2021-07-09 17:32:08,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:08,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:08,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:08,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:08,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:08,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:08,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:08,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:08,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:08,443 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:32:08,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:08,446 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:08,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:08,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:08,453 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:32:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:08,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064659799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:08,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:08,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:08,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741088328] [2021-07-09 17:32:08,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:08,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:08,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:08,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:08,491 INFO L87 Difference]: Start difference. First operand 131 states and 284 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:08,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:08,645 INFO L93 Difference]: Finished difference Result 154 states and 320 transitions. [2021-07-09 17:32:08,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:32:08,646 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:08,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:08,646 INFO L225 Difference]: With dead ends: 154 [2021-07-09 17:32:08,646 INFO L226 Difference]: Without dead ends: 135 [2021-07-09 17:32:08,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 316.7ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:32:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-09 17:32:08,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2021-07-09 17:32:08,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.183206106870229) internal successors, (286), 131 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:08,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 286 transitions. [2021-07-09 17:32:08,648 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 286 transitions. Word has length 18 [2021-07-09 17:32:08,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:08,648 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 286 transitions. [2021-07-09 17:32:08,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:08,648 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 286 transitions. [2021-07-09 17:32:08,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:08,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:08,648 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:08,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1365 [2021-07-09 17:32:08,863 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:08,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:08,864 INFO L82 PathProgramCache]: Analyzing trace with hash 225502950, now seen corresponding path program 237 times [2021-07-09 17:32:08,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:08,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442315022] [2021-07-09 17:32:08,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:09,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:09,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442315022] [2021-07-09 17:32:09,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442315022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:09,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25771461] [2021-07-09 17:32:09,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:09,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:32:09,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:09,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:09,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:09,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:09,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:09,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:09,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:09,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:09,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:09,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:09,236 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-07-09 17:32:09,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:09,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:32:09,238 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:09,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:09,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:09,245 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:32:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:09,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25771461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:09,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:09,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:09,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667988066] [2021-07-09 17:32:09,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:09,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:09,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:09,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:09,284 INFO L87 Difference]: Start difference. First operand 132 states and 286 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:09,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:09,468 INFO L93 Difference]: Finished difference Result 152 states and 317 transitions. [2021-07-09 17:32:09,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:32:09,469 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:09,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:09,469 INFO L225 Difference]: With dead ends: 152 [2021-07-09 17:32:09,469 INFO L226 Difference]: Without dead ends: 136 [2021-07-09 17:32:09,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 368.9ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:32:09,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-09 17:32:09,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-07-09 17:32:09,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1818181818181817) internal successors, (288), 132 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:09,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 288 transitions. [2021-07-09 17:32:09,471 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 288 transitions. Word has length 18 [2021-07-09 17:32:09,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:09,471 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 288 transitions. [2021-07-09 17:32:09,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:09,471 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 288 transitions. [2021-07-09 17:32:09,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:09,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:09,471 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:09,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1366,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:09,672 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:09,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:09,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1087508014, now seen corresponding path program 238 times [2021-07-09 17:32:09,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:09,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135410303] [2021-07-09 17:32:09,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:09,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:09,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135410303] [2021-07-09 17:32:09,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135410303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:09,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913296120] [2021-07-09 17:32:09,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:09,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:09,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:09,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:09,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:10,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:10,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:10,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:10,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:10,056 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:32:10,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:10,059 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:10,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:10,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:10,066 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:32:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:10,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913296120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:10,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:10,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:10,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513840289] [2021-07-09 17:32:10,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:10,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:10,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:10,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:10,106 INFO L87 Difference]: Start difference. First operand 133 states and 288 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:10,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:10,417 INFO L93 Difference]: Finished difference Result 154 states and 325 transitions. [2021-07-09 17:32:10,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:10,418 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:10,418 INFO L225 Difference]: With dead ends: 154 [2021-07-09 17:32:10,418 INFO L226 Difference]: Without dead ends: 141 [2021-07-09 17:32:10,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 437.5ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:10,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-09 17:32:10,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 134. [2021-07-09 17:32:10,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.180451127819549) internal successors, (290), 133 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:10,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 290 transitions. [2021-07-09 17:32:10,420 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 290 transitions. Word has length 18 [2021-07-09 17:32:10,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:10,420 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 290 transitions. [2021-07-09 17:32:10,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:10,420 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 290 transitions. [2021-07-09 17:32:10,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:10,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:10,420 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:10,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1367 [2021-07-09 17:32:10,620 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:10,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:10,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2071274010, now seen corresponding path program 239 times [2021-07-09 17:32:10,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:10,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719135828] [2021-07-09 17:32:10,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:10,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:10,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719135828] [2021-07-09 17:32:10,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719135828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:10,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950973840] [2021-07-09 17:32:10,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:10,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:32:10,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:10,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:10,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:10,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:10,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:10,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:10,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:10,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:10,981 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:10,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:10,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,034 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-07-09 17:32:11,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:11,038 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:11,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:11,042 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:11,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:11,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:11,063 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:11,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950973840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:11,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:11,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:11,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800440945] [2021-07-09 17:32:11,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:11,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:11,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:11,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:11,141 INFO L87 Difference]: Start difference. First operand 134 states and 290 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:11,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:11,504 INFO L93 Difference]: Finished difference Result 175 states and 356 transitions. [2021-07-09 17:32:11,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:11,504 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:11,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:11,504 INFO L225 Difference]: With dead ends: 175 [2021-07-09 17:32:11,504 INFO L226 Difference]: Without dead ends: 156 [2021-07-09 17:32:11,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 520.0ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:11,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-09 17:32:11,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 132. [2021-07-09 17:32:11,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.183206106870229) internal successors, (286), 131 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:11,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 286 transitions. [2021-07-09 17:32:11,506 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 286 transitions. Word has length 18 [2021-07-09 17:32:11,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:11,506 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 286 transitions. [2021-07-09 17:32:11,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:11,506 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 286 transitions. [2021-07-09 17:32:11,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:11,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:11,506 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:11,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1368 [2021-07-09 17:32:11,707 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:11,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:11,707 INFO L82 PathProgramCache]: Analyzing trace with hash -660295330, now seen corresponding path program 240 times [2021-07-09 17:32:11,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:11,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012337456] [2021-07-09 17:32:11,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:11,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:11,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012337456] [2021-07-09 17:32:11,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012337456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:11,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802589341] [2021-07-09 17:32:11,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:11,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:32:11,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:11,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:32:11,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:11,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:11,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:11,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:32:11,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:12,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:12,000 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:32:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:12,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802589341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:12,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:12,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:12,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530794191] [2021-07-09 17:32:12,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:12,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:12,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:12,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:12,035 INFO L87 Difference]: Start difference. First operand 132 states and 286 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:12,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:12,206 INFO L93 Difference]: Finished difference Result 153 states and 322 transitions. [2021-07-09 17:32:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:32:12,207 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:12,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:12,207 INFO L225 Difference]: With dead ends: 153 [2021-07-09 17:32:12,207 INFO L226 Difference]: Without dead ends: 146 [2021-07-09 17:32:12,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 294.9ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:32:12,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-09 17:32:12,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 134. [2021-07-09 17:32:12,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.18796992481203) internal successors, (291), 133 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:12,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 291 transitions. [2021-07-09 17:32:12,209 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 291 transitions. Word has length 18 [2021-07-09 17:32:12,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:12,209 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 291 transitions. [2021-07-09 17:32:12,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:12,209 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 291 transitions. [2021-07-09 17:32:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:12,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:12,209 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:12,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1371,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:12,421 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:12,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:12,421 INFO L82 PathProgramCache]: Analyzing trace with hash 201709734, now seen corresponding path program 241 times [2021-07-09 17:32:12,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:12,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167091141] [2021-07-09 17:32:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:12,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:12,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167091141] [2021-07-09 17:32:12,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167091141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:12,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677688665] [2021-07-09 17:32:12,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:12,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:12,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:12,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:12,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:12,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:12,768 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:12,788 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:32:12,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:12,792 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:12,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:12,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:12,799 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:32:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:12,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677688665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:12,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:12,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:12,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620927759] [2021-07-09 17:32:12,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:12,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:12,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:12,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:12,833 INFO L87 Difference]: Start difference. First operand 134 states and 291 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:13,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:13,154 INFO L93 Difference]: Finished difference Result 163 states and 341 transitions. [2021-07-09 17:32:13,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:32:13,154 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:13,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:13,154 INFO L225 Difference]: With dead ends: 163 [2021-07-09 17:32:13,154 INFO L226 Difference]: Without dead ends: 150 [2021-07-09 17:32:13,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 399.8ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-07-09 17:32:13,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 135. [2021-07-09 17:32:13,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1865671641791047) internal successors, (293), 134 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:13,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 293 transitions. [2021-07-09 17:32:13,156 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 293 transitions. Word has length 18 [2021-07-09 17:32:13,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:13,156 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 293 transitions. [2021-07-09 17:32:13,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:13,156 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 293 transitions. [2021-07-09 17:32:13,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:13,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:13,156 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:13,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1372,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:13,357 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:13,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:13,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1337895006, now seen corresponding path program 242 times [2021-07-09 17:32:13,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:13,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541382207] [2021-07-09 17:32:13,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:13,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:13,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541382207] [2021-07-09 17:32:13,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541382207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:13,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959500827] [2021-07-09 17:32:13,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:13,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:13,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:13,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:13,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:13,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:13,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:13,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:13,677 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:13,680 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,730 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-07-09 17:32:13,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:13,734 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:13,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:13,737 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:13,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:13,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:13,759 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:13,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959500827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:13,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:13,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:13,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973692746] [2021-07-09 17:32:13,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:13,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:13,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:13,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:13,829 INFO L87 Difference]: Start difference. First operand 135 states and 293 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:14,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:14,166 INFO L93 Difference]: Finished difference Result 184 states and 372 transitions. [2021-07-09 17:32:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:14,166 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:14,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:14,166 INFO L225 Difference]: With dead ends: 184 [2021-07-09 17:32:14,166 INFO L226 Difference]: Without dead ends: 165 [2021-07-09 17:32:14,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 467.3ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:14,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-07-09 17:32:14,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 133. [2021-07-09 17:32:14,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1818181818181817) internal successors, (288), 132 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:14,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 288 transitions. [2021-07-09 17:32:14,168 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 288 transitions. Word has length 18 [2021-07-09 17:32:14,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:14,168 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 288 transitions. [2021-07-09 17:32:14,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:14,168 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 288 transitions. [2021-07-09 17:32:14,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:14,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:14,168 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:14,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1373,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:14,369 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:14,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:14,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1905074386, now seen corresponding path program 243 times [2021-07-09 17:32:14,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:14,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259028574] [2021-07-09 17:32:14,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:14,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:14,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259028574] [2021-07-09 17:32:14,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259028574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:14,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018476968] [2021-07-09 17:32:14,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:14,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:32:14,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:14,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:14,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:14,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:14,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:14,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:14,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:14,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:14,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:14,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:14,684 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-07-09 17:32:14,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:14,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:32:14,687 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:14,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:14,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:14,694 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:32:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:14,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018476968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:14,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:14,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:14,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585697369] [2021-07-09 17:32:14,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:14,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:14,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:14,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:14,727 INFO L87 Difference]: Start difference. First operand 133 states and 288 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:14,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:14,916 INFO L93 Difference]: Finished difference Result 156 states and 329 transitions. [2021-07-09 17:32:14,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:14,917 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:14,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:14,917 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:32:14,917 INFO L226 Difference]: Without dead ends: 143 [2021-07-09 17:32:14,917 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 318.1ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:32:14,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-09 17:32:14,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 135. [2021-07-09 17:32:14,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1791044776119404) internal successors, (292), 134 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:14,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 292 transitions. [2021-07-09 17:32:14,918 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 292 transitions. Word has length 18 [2021-07-09 17:32:14,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:14,919 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 292 transitions. [2021-07-09 17:32:14,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:14,919 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 292 transitions. [2021-07-09 17:32:14,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:14,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:14,919 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:15,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1376 [2021-07-09 17:32:15,119 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:15,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:15,120 INFO L82 PathProgramCache]: Analyzing trace with hash -768889114, now seen corresponding path program 244 times [2021-07-09 17:32:15,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:15,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700031220] [2021-07-09 17:32:15,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:15,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:15,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700031220] [2021-07-09 17:32:15,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700031220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:15,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119021397] [2021-07-09 17:32:15,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:15,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:15,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:15,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:15,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:15,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:15,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:15,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:15,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:15,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:15,407 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:15,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:15,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:15,460 INFO L628 ElimStorePlain]: treesize reduction 90, result has 38.8 percent of original size [2021-07-09 17:32:15,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:15,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:15,469 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:15,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:15,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:15,492 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:173, output treesize:36 [2021-07-09 17:32:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:15,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119021397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:15,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:15,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:15,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319113463] [2021-07-09 17:32:15,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:15,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:15,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:15,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:15,561 INFO L87 Difference]: Start difference. First operand 135 states and 292 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:15,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:15,847 INFO L93 Difference]: Finished difference Result 176 states and 358 transitions. [2021-07-09 17:32:15,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:15,847 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:15,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:15,848 INFO L225 Difference]: With dead ends: 176 [2021-07-09 17:32:15,848 INFO L226 Difference]: Without dead ends: 157 [2021-07-09 17:32:15,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 419.1ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:15,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-09 17:32:15,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 134. [2021-07-09 17:32:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.180451127819549) internal successors, (290), 133 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 290 transitions. [2021-07-09 17:32:15,849 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 290 transitions. Word has length 18 [2021-07-09 17:32:15,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:15,849 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 290 transitions. [2021-07-09 17:32:15,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 290 transitions. [2021-07-09 17:32:15,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:15,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:15,850 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:16,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1377 [2021-07-09 17:32:16,053 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:16,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:16,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1379907422, now seen corresponding path program 245 times [2021-07-09 17:32:16,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:16,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35721735] [2021-07-09 17:32:16,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:16,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:16,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35721735] [2021-07-09 17:32:16,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35721735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:16,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171729455] [2021-07-09 17:32:16,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:16,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:32:16,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:16,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:16,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:16,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:16,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:16,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:16,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:16,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:16,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:16,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:16,391 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:32:16,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:16,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:16,395 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:16,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:16,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:16,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:16,420 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:16,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:16,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:16,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:16,447 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:16,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:16,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:16,467 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:16,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171729455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:16,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:16,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:16,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936131463] [2021-07-09 17:32:16,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:16,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:16,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:16,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:16,553 INFO L87 Difference]: Start difference. First operand 134 states and 290 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:16,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:16,743 INFO L93 Difference]: Finished difference Result 173 states and 361 transitions. [2021-07-09 17:32:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:16,743 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:16,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:16,744 INFO L225 Difference]: With dead ends: 173 [2021-07-09 17:32:16,744 INFO L226 Difference]: Without dead ends: 154 [2021-07-09 17:32:16,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 334.3ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:32:16,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-09 17:32:16,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 136. [2021-07-09 17:32:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.185185185185185) internal successors, (295), 135 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:16,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 295 transitions. [2021-07-09 17:32:16,745 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 295 transitions. Word has length 18 [2021-07-09 17:32:16,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:16,745 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 295 transitions. [2021-07-09 17:32:16,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:16,745 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 295 transitions. [2021-07-09 17:32:16,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:16,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:16,746 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:16,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1380,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:16,947 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:16,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:16,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1944729062, now seen corresponding path program 246 times [2021-07-09 17:32:16,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:16,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460982089] [2021-07-09 17:32:16,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:17,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:17,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460982089] [2021-07-09 17:32:17,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460982089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:17,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579017763] [2021-07-09 17:32:17,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:17,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:32:17,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:17,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:32:17,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:17,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:17,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:17,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:17,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:17,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:17,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:32:17,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:17,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:17,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:17,234 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:32:17,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:17,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579017763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:17,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:17,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:17,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918133657] [2021-07-09 17:32:17,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:17,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:17,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:17,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:17,269 INFO L87 Difference]: Start difference. First operand 136 states and 295 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:17,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:17,486 INFO L93 Difference]: Finished difference Result 158 states and 333 transitions. [2021-07-09 17:32:17,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:32:17,486 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:17,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:17,487 INFO L225 Difference]: With dead ends: 158 [2021-07-09 17:32:17,487 INFO L226 Difference]: Without dead ends: 151 [2021-07-09 17:32:17,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 294.7ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:32:17,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-09 17:32:17,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2021-07-09 17:32:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.1884057971014492) internal successors, (302), 138 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:17,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 302 transitions. [2021-07-09 17:32:17,488 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 302 transitions. Word has length 18 [2021-07-09 17:32:17,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:17,488 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 302 transitions. [2021-07-09 17:32:17,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:17,488 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 302 transitions. [2021-07-09 17:32:17,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:17,489 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:17,489 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:17,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1385 [2021-07-09 17:32:17,697 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:17,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:17,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1488233170, now seen corresponding path program 247 times [2021-07-09 17:32:17,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:17,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230285420] [2021-07-09 17:32:17,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:17,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:17,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:17,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230285420] [2021-07-09 17:32:17,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230285420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:17,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687623660] [2021-07-09 17:32:17,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:17,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:17,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:18,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:18,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:18,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:18,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:18,037 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-07-09 17:32:18,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:18,039 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:18,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:18,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:18,046 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:32:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:18,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687623660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:18,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:18,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:18,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766387810] [2021-07-09 17:32:18,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:18,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:18,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:18,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:18,082 INFO L87 Difference]: Start difference. First operand 139 states and 302 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:18,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:18,430 INFO L93 Difference]: Finished difference Result 168 states and 352 transitions. [2021-07-09 17:32:18,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:18,430 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:18,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:18,430 INFO L225 Difference]: With dead ends: 168 [2021-07-09 17:32:18,430 INFO L226 Difference]: Without dead ends: 155 [2021-07-09 17:32:18,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 411.4ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:18,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-07-09 17:32:18,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2021-07-09 17:32:18,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.1870503597122304) internal successors, (304), 139 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:18,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 304 transitions. [2021-07-09 17:32:18,432 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 304 transitions. Word has length 18 [2021-07-09 17:32:18,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:18,432 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 304 transitions. [2021-07-09 17:32:18,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:18,432 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 304 transitions. [2021-07-09 17:32:18,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:18,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:18,432 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:18,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1386 [2021-07-09 17:32:18,633 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:18,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:18,633 INFO L82 PathProgramCache]: Analyzing trace with hash -352047898, now seen corresponding path program 248 times [2021-07-09 17:32:18,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:18,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038101640] [2021-07-09 17:32:18,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:18,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:18,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038101640] [2021-07-09 17:32:18,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038101640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:18,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891714621] [2021-07-09 17:32:18,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:18,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:18,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:18,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:18,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:18,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:18,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:18,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:18,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:18,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:18,936 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:18,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:18,939 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:18,987 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-07-09 17:32:18,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:18,992 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:18,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:18,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:18,995 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:19,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:19,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:19,016 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:19,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891714621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:19,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:19,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:19,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310149922] [2021-07-09 17:32:19,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:19,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:19,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:19,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:19,085 INFO L87 Difference]: Start difference. First operand 140 states and 304 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:19,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:19,452 INFO L93 Difference]: Finished difference Result 188 states and 381 transitions. [2021-07-09 17:32:19,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:19,452 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:19,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:19,453 INFO L225 Difference]: With dead ends: 188 [2021-07-09 17:32:19,453 INFO L226 Difference]: Without dead ends: 169 [2021-07-09 17:32:19,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 480.8ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:32:19,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-09 17:32:19,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 138. [2021-07-09 17:32:19,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.1824817518248176) internal successors, (299), 137 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 299 transitions. [2021-07-09 17:32:19,454 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 299 transitions. Word has length 18 [2021-07-09 17:32:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:19,454 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 299 transitions. [2021-07-09 17:32:19,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:19,455 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 299 transitions. [2021-07-09 17:32:19,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:19,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:19,455 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:19,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1387 [2021-07-09 17:32:19,655 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:19,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:19,656 INFO L82 PathProgramCache]: Analyzing trace with hash 699950006, now seen corresponding path program 249 times [2021-07-09 17:32:19,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:19,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499650426] [2021-07-09 17:32:19,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:19,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:19,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499650426] [2021-07-09 17:32:19,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499650426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:19,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133950577] [2021-07-09 17:32:19,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:19,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:32:19,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:19,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:19,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:19,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:19,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:19,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:19,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:19,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:19,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:19,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:19,964 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:32:19,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:19,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:19,967 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:19,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:19,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:19,974 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:32:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:20,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133950577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:20,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:20,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:20,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414459694] [2021-07-09 17:32:20,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:20,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:20,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:20,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:20,007 INFO L87 Difference]: Start difference. First operand 138 states and 299 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:20,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:20,239 INFO L93 Difference]: Finished difference Result 159 states and 336 transitions. [2021-07-09 17:32:20,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:32:20,239 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:20,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:20,239 INFO L225 Difference]: With dead ends: 159 [2021-07-09 17:32:20,239 INFO L226 Difference]: Without dead ends: 146 [2021-07-09 17:32:20,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 341.6ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:20,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-09 17:32:20,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2021-07-09 17:32:20,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.179856115107914) internal successors, (303), 139 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:20,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 303 transitions. [2021-07-09 17:32:20,241 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 303 transitions. Word has length 18 [2021-07-09 17:32:20,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:20,241 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 303 transitions. [2021-07-09 17:32:20,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:20,241 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 303 transitions. [2021-07-09 17:32:20,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:20,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:20,241 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:20,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1390 [2021-07-09 17:32:20,453 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:20,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:20,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1836135278, now seen corresponding path program 250 times [2021-07-09 17:32:20,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:20,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290626294] [2021-07-09 17:32:20,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:20,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:20,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290626294] [2021-07-09 17:32:20,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290626294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:20,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364991774] [2021-07-09 17:32:20,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:20,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:20,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:20,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:20,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:20,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:20,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:20,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:20,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:20,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:20,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:20,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:20,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:20,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:20,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:20,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:20,712 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:20,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:20,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:20,715 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:20,767 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-07-09 17:32:20,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:20,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:20,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:20,771 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:20,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:20,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:20,775 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:20,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:20,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:20,796 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:20,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364991774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:20,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:20,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:20,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038101804] [2021-07-09 17:32:20,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:20,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:20,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:20,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:20,862 INFO L87 Difference]: Start difference. First operand 140 states and 303 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:21,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:21,118 INFO L93 Difference]: Finished difference Result 156 states and 328 transitions. [2021-07-09 17:32:21,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:32:21,119 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:21,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:21,120 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:32:21,120 INFO L226 Difference]: Without dead ends: 144 [2021-07-09 17:32:21,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 362.4ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:21,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-09 17:32:21,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 139. [2021-07-09 17:32:21,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.181159420289855) internal successors, (301), 138 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 301 transitions. [2021-07-09 17:32:21,121 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 301 transitions. Word has length 18 [2021-07-09 17:32:21,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:21,121 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 301 transitions. [2021-07-09 17:32:21,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:21,122 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 301 transitions. [2021-07-09 17:32:21,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:21,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:21,122 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:21,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1391,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:21,329 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:21,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:21,329 INFO L82 PathProgramCache]: Analyzing trace with hash -310035482, now seen corresponding path program 251 times [2021-07-09 17:32:21,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:21,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966208235] [2021-07-09 17:32:21,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:21,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:21,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:21,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966208235] [2021-07-09 17:32:21,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966208235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:21,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136763247] [2021-07-09 17:32:21,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:21,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:32:21,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:21,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:21,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:21,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:21,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:21,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:21,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:21,655 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:32:21,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:21,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:21,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:21,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:21,683 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:21,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:21,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:21,707 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:21,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:21,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:21,727 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:21,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136763247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:21,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:21,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:21,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354087680] [2021-07-09 17:32:21,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:21,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:21,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:21,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:21,797 INFO L87 Difference]: Start difference. First operand 139 states and 301 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:21,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:21,990 INFO L93 Difference]: Finished difference Result 169 states and 359 transitions. [2021-07-09 17:32:21,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:21,990 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:21,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:21,991 INFO L225 Difference]: With dead ends: 169 [2021-07-09 17:32:21,991 INFO L226 Difference]: Without dead ends: 157 [2021-07-09 17:32:21,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 312.3ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:32:21,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-09 17:32:21,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 139. [2021-07-09 17:32:21,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.181159420289855) internal successors, (301), 138 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:21,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 301 transitions. [2021-07-09 17:32:21,993 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 301 transitions. Word has length 18 [2021-07-09 17:32:21,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:21,993 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 301 transitions. [2021-07-09 17:32:21,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 301 transitions. [2021-07-09 17:32:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:21,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:21,993 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:22,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1394,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:22,205 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:22,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:22,205 INFO L82 PathProgramCache]: Analyzing trace with hash -185848274, now seen corresponding path program 252 times [2021-07-09 17:32:22,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:22,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249757185] [2021-07-09 17:32:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:22,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:22,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249757185] [2021-07-09 17:32:22,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249757185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:22,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254567390] [2021-07-09 17:32:22,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:22,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:32:22,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:22,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:32:22,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:22,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:22,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:22,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:22,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:22,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:22,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:22,512 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:22,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:22,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:22,518 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:32:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:22,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254567390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:22,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:22,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:22,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093169894] [2021-07-09 17:32:22,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:22,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:22,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:22,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:22,553 INFO L87 Difference]: Start difference. First operand 139 states and 301 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:22,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:22,821 INFO L93 Difference]: Finished difference Result 164 states and 349 transitions. [2021-07-09 17:32:22,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:22,821 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:22,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:22,822 INFO L225 Difference]: With dead ends: 164 [2021-07-09 17:32:22,822 INFO L226 Difference]: Without dead ends: 157 [2021-07-09 17:32:22,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 342.9ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:22,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-09 17:32:22,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 142. [2021-07-09 17:32:22,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1843971631205674) internal successors, (308), 141 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:22,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 308 transitions. [2021-07-09 17:32:22,823 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 308 transitions. Word has length 18 [2021-07-09 17:32:22,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:22,823 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 308 transitions. [2021-07-09 17:32:22,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:22,823 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 308 transitions. [2021-07-09 17:32:22,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:22,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:22,824 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:23,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1399 [2021-07-09 17:32:23,024 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:23,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:23,024 INFO L82 PathProgramCache]: Analyzing trace with hash 950336998, now seen corresponding path program 253 times [2021-07-09 17:32:23,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:23,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118600310] [2021-07-09 17:32:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:23,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:23,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118600310] [2021-07-09 17:32:23,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118600310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:23,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801357955] [2021-07-09 17:32:23,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:23,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:23,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:23,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:23,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:23,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:23,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:23,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:23,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:23,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:23,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:23,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:23,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:23,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:23,340 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:23,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:23,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:23,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:23,392 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-07-09 17:32:23,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:23,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:23,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:23,401 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:23,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:23,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:23,405 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:23,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:23,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:23,427 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:23,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:23,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801357955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:23,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:23,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:23,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744570893] [2021-07-09 17:32:23,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:23,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:23,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:23,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:23,497 INFO L87 Difference]: Start difference. First operand 142 states and 308 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:23,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:23,711 INFO L93 Difference]: Finished difference Result 168 states and 351 transitions. [2021-07-09 17:32:23,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:23,711 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:23,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:23,712 INFO L225 Difference]: With dead ends: 168 [2021-07-09 17:32:23,712 INFO L226 Difference]: Without dead ends: 156 [2021-07-09 17:32:23,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 371.7ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:23,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-09 17:32:23,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 142. [2021-07-09 17:32:23,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1843971631205674) internal successors, (308), 141 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 308 transitions. [2021-07-09 17:32:23,713 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 308 transitions. Word has length 18 [2021-07-09 17:32:23,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:23,713 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 308 transitions. [2021-07-09 17:32:23,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:23,713 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 308 transitions. [2021-07-09 17:32:23,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:23,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:23,714 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:23,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1400,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:23,914 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:23,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:23,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1195833762, now seen corresponding path program 254 times [2021-07-09 17:32:23,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:23,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571163105] [2021-07-09 17:32:23,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:24,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:24,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571163105] [2021-07-09 17:32:24,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571163105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:24,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326258627] [2021-07-09 17:32:24,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:24,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:24,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:24,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:24,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:24,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:24,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:24,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:24,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:24,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:24,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:24,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:24,304 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-07-09 17:32:24,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:24,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:24,308 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:24,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:24,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:24,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:24,331 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:24,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:24,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:24,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:24,355 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:24,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:24,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:24,375 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:24,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326258627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:24,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:24,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:24,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671759723] [2021-07-09 17:32:24,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:24,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:24,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:24,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:24,459 INFO L87 Difference]: Start difference. First operand 142 states and 308 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:24,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:24,929 INFO L93 Difference]: Finished difference Result 194 states and 401 transitions. [2021-07-09 17:32:24,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:32:24,930 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:24,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:24,930 INFO L225 Difference]: With dead ends: 194 [2021-07-09 17:32:24,930 INFO L226 Difference]: Without dead ends: 175 [2021-07-09 17:32:24,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 593.6ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:32:24,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-07-09 17:32:24,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 142. [2021-07-09 17:32:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1843971631205674) internal successors, (308), 141 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 308 transitions. [2021-07-09 17:32:24,932 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 308 transitions. Word has length 18 [2021-07-09 17:32:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:24,932 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 308 transitions. [2021-07-09 17:32:24,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 308 transitions. [2021-07-09 17:32:24,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:24,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:24,932 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:25,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1403 [2021-07-09 17:32:25,133 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:25,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:25,133 INFO L82 PathProgramCache]: Analyzing trace with hash 992349414, now seen corresponding path program 255 times [2021-07-09 17:32:25,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:25,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446476605] [2021-07-09 17:32:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:25,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:25,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446476605] [2021-07-09 17:32:25,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446476605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:25,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421573066] [2021-07-09 17:32:25,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:25,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:32:25,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:25,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:32:25,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:25,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:25,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:25,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:25,407 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:25,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:25,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:25,430 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:25,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:25,433 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:25,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:25,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:25,453 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:32:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:25,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421573066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:25,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:25,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:25,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008708293] [2021-07-09 17:32:25,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:25,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:25,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:25,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:25,520 INFO L87 Difference]: Start difference. First operand 142 states and 308 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:25,737 INFO L93 Difference]: Finished difference Result 169 states and 360 transitions. [2021-07-09 17:32:25,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:25,737 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:25,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:25,737 INFO L225 Difference]: With dead ends: 169 [2021-07-09 17:32:25,737 INFO L226 Difference]: Without dead ends: 162 [2021-07-09 17:32:25,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 312.5ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:25,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-07-09 17:32:25,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 142. [2021-07-09 17:32:25,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1843971631205674) internal successors, (308), 141 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:25,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 308 transitions. [2021-07-09 17:32:25,739 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 308 transitions. Word has length 18 [2021-07-09 17:32:25,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:25,739 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 308 transitions. [2021-07-09 17:32:25,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:25,739 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 308 transitions. [2021-07-09 17:32:25,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:25,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:25,739 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:25,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1408,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:25,940 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:25,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:25,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1096106590, now seen corresponding path program 256 times [2021-07-09 17:32:25,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:25,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629555655] [2021-07-09 17:32:25,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:26,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:26,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629555655] [2021-07-09 17:32:26,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629555655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:26,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964483880] [2021-07-09 17:32:26,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:26,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:26,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:26,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:26,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:26,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:26,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:26,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:26,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:26,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:26,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:26,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:26,299 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:32:26,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:26,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:26,302 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:26,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:26,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:26,309 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:32:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:26,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964483880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:26,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:26,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:26,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234966250] [2021-07-09 17:32:26,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:26,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:26,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:26,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:26,346 INFO L87 Difference]: Start difference. First operand 142 states and 308 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:26,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:26,578 INFO L93 Difference]: Finished difference Result 175 states and 360 transitions. [2021-07-09 17:32:26,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:32:26,579 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:26,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:26,579 INFO L225 Difference]: With dead ends: 175 [2021-07-09 17:32:26,579 INFO L226 Difference]: Without dead ends: 150 [2021-07-09 17:32:26,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 332.6ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:26,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-07-09 17:32:26,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2021-07-09 17:32:26,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.179310344827586) internal successors, (316), 145 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:26,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 316 transitions. [2021-07-09 17:32:26,581 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 316 transitions. Word has length 18 [2021-07-09 17:32:26,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:26,581 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 316 transitions. [2021-07-09 17:32:26,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:26,581 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 316 transitions. [2021-07-09 17:32:26,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:26,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:26,581 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:26,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1411 [2021-07-09 17:32:26,789 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:26,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:26,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1958111654, now seen corresponding path program 257 times [2021-07-09 17:32:26,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:26,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99726918] [2021-07-09 17:32:26,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:26,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:26,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99726918] [2021-07-09 17:32:26,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99726918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:26,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129539108] [2021-07-09 17:32:26,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:26,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:32:26,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:26,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:26,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:27,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:27,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:27,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:27,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:27,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:27,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:27,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:27,143 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-07-09 17:32:27,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:27,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:32:27,145 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:27,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:27,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:27,157 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:32:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:27,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129539108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:27,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:27,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:27,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012015744] [2021-07-09 17:32:27,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:27,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:27,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:27,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:27,196 INFO L87 Difference]: Start difference. First operand 146 states and 316 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:27,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:27,498 INFO L93 Difference]: Finished difference Result 169 states and 357 transitions. [2021-07-09 17:32:27,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:27,498 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:27,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:27,499 INFO L225 Difference]: With dead ends: 169 [2021-07-09 17:32:27,499 INFO L226 Difference]: Without dead ends: 156 [2021-07-09 17:32:27,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 419.8ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:27,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-09 17:32:27,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2021-07-09 17:32:27,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1780821917808217) internal successors, (318), 146 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:27,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 318 transitions. [2021-07-09 17:32:27,501 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 318 transitions. Word has length 18 [2021-07-09 17:32:27,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:27,501 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 318 transitions. [2021-07-09 17:32:27,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:27,501 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 318 transitions. [2021-07-09 17:32:27,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:27,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:27,501 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:27,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1412 [2021-07-09 17:32:27,704 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:27,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:27,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1200670370, now seen corresponding path program 258 times [2021-07-09 17:32:27,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:27,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808545229] [2021-07-09 17:32:27,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:27,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:27,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808545229] [2021-07-09 17:32:27,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808545229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:27,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698216544] [2021-07-09 17:32:27,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:27,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:32:27,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:27,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:32:27,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:28,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:28,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:28,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:28,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:28,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:28,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:28,033 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:28,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:28,036 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:28,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:28,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:28,059 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:32:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:28,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698216544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:28,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:28,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:28,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287065026] [2021-07-09 17:32:28,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:28,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:28,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:28,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:28,143 INFO L87 Difference]: Start difference. First operand 147 states and 318 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:28,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:28,613 INFO L93 Difference]: Finished difference Result 167 states and 353 transitions. [2021-07-09 17:32:28,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:28,613 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:28,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:28,613 INFO L225 Difference]: With dead ends: 167 [2021-07-09 17:32:28,613 INFO L226 Difference]: Without dead ends: 157 [2021-07-09 17:32:28,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 571.9ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:32:28,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-09 17:32:28,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 148. [2021-07-09 17:32:28,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.183673469387755) internal successors, (321), 147 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:28,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 321 transitions. [2021-07-09 17:32:28,615 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 321 transitions. Word has length 18 [2021-07-09 17:32:28,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:28,615 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 321 transitions. [2021-07-09 17:32:28,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:28,615 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 321 transitions. [2021-07-09 17:32:28,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:28,615 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:28,615 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:28,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1413 [2021-07-09 17:32:28,816 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:28,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:28,816 INFO L82 PathProgramCache]: Analyzing trace with hash -148672466, now seen corresponding path program 259 times [2021-07-09 17:32:28,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:28,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905374908] [2021-07-09 17:32:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:28,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:28,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:28,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905374908] [2021-07-09 17:32:28,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905374908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:28,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229972497] [2021-07-09 17:32:28,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:28,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:28,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:29,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:29,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:29,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:29,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:29,122 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:32:29,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:29,126 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:29,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:29,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:29,134 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:32:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:29,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229972497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:29,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:29,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:29,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404196496] [2021-07-09 17:32:29,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:29,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:29,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:29,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:29,172 INFO L87 Difference]: Start difference. First operand 148 states and 321 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:29,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:29,441 INFO L93 Difference]: Finished difference Result 171 states and 362 transitions. [2021-07-09 17:32:29,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:29,441 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:29,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:29,441 INFO L225 Difference]: With dead ends: 171 [2021-07-09 17:32:29,441 INFO L226 Difference]: Without dead ends: 158 [2021-07-09 17:32:29,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 363.7ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:29,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-09 17:32:29,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2021-07-09 17:32:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1812080536912752) internal successors, (325), 149 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 325 transitions. [2021-07-09 17:32:29,443 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 325 transitions. Word has length 18 [2021-07-09 17:32:29,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:29,443 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 325 transitions. [2021-07-09 17:32:29,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:29,443 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 325 transitions. [2021-07-09 17:32:29,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:29,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:29,444 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:29,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1418,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:29,644 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:29,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:29,644 INFO L82 PathProgramCache]: Analyzing trace with hash 987512806, now seen corresponding path program 260 times [2021-07-09 17:32:29,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:29,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146335630] [2021-07-09 17:32:29,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:29,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:29,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146335630] [2021-07-09 17:32:29,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146335630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:29,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235027045] [2021-07-09 17:32:29,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:29,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:29,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:29,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:32:29,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:29,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:29,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:29,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:29,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:29,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:29,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:29,963 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:29,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:29,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:29,966 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:29,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:29,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:29,986 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:32:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:30,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235027045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:30,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:30,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:30,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621459706] [2021-07-09 17:32:30,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:30,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:30,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:30,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:30,055 INFO L87 Difference]: Start difference. First operand 150 states and 325 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:30,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:30,339 INFO L93 Difference]: Finished difference Result 168 states and 359 transitions. [2021-07-09 17:32:30,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:32:30,339 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:30,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:30,340 INFO L225 Difference]: With dead ends: 168 [2021-07-09 17:32:30,340 INFO L226 Difference]: Without dead ends: 161 [2021-07-09 17:32:30,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 407.9ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:30,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-09 17:32:30,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 150. [2021-07-09 17:32:30,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1812080536912752) internal successors, (325), 149 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 325 transitions. [2021-07-09 17:32:30,342 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 325 transitions. Word has length 18 [2021-07-09 17:32:30,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:30,342 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 325 transitions. [2021-07-09 17:32:30,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:30,342 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 325 transitions. [2021-07-09 17:32:30,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:30,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:30,342 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:30,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:30,543 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:30,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:30,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1158657954, now seen corresponding path program 261 times [2021-07-09 17:32:30,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:30,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822487806] [2021-07-09 17:32:30,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:30,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:30,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822487806] [2021-07-09 17:32:30,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822487806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:30,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71514711] [2021-07-09 17:32:30,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:30,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:32:30,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:30,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:30,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:30,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:30,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:30,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:30,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:30,893 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:32:30,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:30,897 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:30,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:30,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:30,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:30,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:30,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:30,955 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:30,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:30,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:30,975 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:31,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71514711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:31,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:31,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:31,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253771450] [2021-07-09 17:32:31,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:31,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:31,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:31,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:31,045 INFO L87 Difference]: Start difference. First operand 150 states and 325 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:31,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:31,350 INFO L93 Difference]: Finished difference Result 184 states and 390 transitions. [2021-07-09 17:32:31,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:31,350 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:31,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:31,351 INFO L225 Difference]: With dead ends: 184 [2021-07-09 17:32:31,351 INFO L226 Difference]: Without dead ends: 172 [2021-07-09 17:32:31,351 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 401.4ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:31,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-09 17:32:31,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 150. [2021-07-09 17:32:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1812080536912752) internal successors, (325), 149 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:31,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 325 transitions. [2021-07-09 17:32:31,352 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 325 transitions. Word has length 18 [2021-07-09 17:32:31,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:31,352 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 325 transitions. [2021-07-09 17:32:31,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:31,353 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 325 transitions. [2021-07-09 17:32:31,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:31,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:31,353 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:31,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1422,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:31,553 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:31,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:31,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1034470746, now seen corresponding path program 262 times [2021-07-09 17:32:31,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:31,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96390976] [2021-07-09 17:32:31,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:31,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:31,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96390976] [2021-07-09 17:32:31,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96390976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:31,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601844309] [2021-07-09 17:32:31,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:31,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:31,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:31,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:31,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:31,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:31,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:31,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:31,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:31,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:31,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:31,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:31,859 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-07-09 17:32:31,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:31,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:32:31,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:31,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:31,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:31,868 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:32:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:31,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601844309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:31,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:31,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:31,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887071419] [2021-07-09 17:32:31,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:31,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:31,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:31,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:31,903 INFO L87 Difference]: Start difference. First operand 150 states and 325 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:32,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:32,156 INFO L93 Difference]: Finished difference Result 172 states and 364 transitions. [2021-07-09 17:32:32,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:32,156 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:32,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:32,156 INFO L225 Difference]: With dead ends: 172 [2021-07-09 17:32:32,156 INFO L226 Difference]: Without dead ends: 159 [2021-07-09 17:32:32,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 336.8ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:32,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-07-09 17:32:32,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 153. [2021-07-09 17:32:32,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1776315789473686) internal successors, (331), 152 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 331 transitions. [2021-07-09 17:32:32,158 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 331 transitions. Word has length 18 [2021-07-09 17:32:32,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:32,158 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 331 transitions. [2021-07-09 17:32:32,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:32,158 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 331 transitions. [2021-07-09 17:32:32,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:32,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:32,158 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:32,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1427,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:32,359 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:32,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:32,359 INFO L82 PathProgramCache]: Analyzing trace with hash 101714526, now seen corresponding path program 263 times [2021-07-09 17:32:32,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:32,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217300608] [2021-07-09 17:32:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:32,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:32,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217300608] [2021-07-09 17:32:32,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217300608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:32,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659391676] [2021-07-09 17:32:32,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:32,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:32:32,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:32,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:32,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:32,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:32,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:32,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:32,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:32,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:32,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:32,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:32,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:32,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:32,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:32,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:32,649 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:32,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:32,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:32,652 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:32,703 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-07-09 17:32:32,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:32,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:32,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:32,707 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:32,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:32,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:32,710 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:32,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:32,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:32,732 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:32,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659391676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:32,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:32,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:32,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462840555] [2021-07-09 17:32:32,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:32,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:32,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:32,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:32,803 INFO L87 Difference]: Start difference. First operand 153 states and 331 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:33,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:33,171 INFO L93 Difference]: Finished difference Result 191 states and 391 transitions. [2021-07-09 17:32:33,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:33,172 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:33,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:33,172 INFO L225 Difference]: With dead ends: 191 [2021-07-09 17:32:33,172 INFO L226 Difference]: Without dead ends: 172 [2021-07-09 17:32:33,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 447.0ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:33,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-09 17:32:33,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 152. [2021-07-09 17:32:33,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1788079470198674) internal successors, (329), 151 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 329 transitions. [2021-07-09 17:32:33,174 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 329 transitions. Word has length 18 [2021-07-09 17:32:33,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:33,174 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 329 transitions. [2021-07-09 17:32:33,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:33,174 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 329 transitions. [2021-07-09 17:32:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:33,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:33,174 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:33,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1428 [2021-07-09 17:32:33,375 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:33,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:33,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2044456234, now seen corresponding path program 264 times [2021-07-09 17:32:33,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:33,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973068709] [2021-07-09 17:32:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:33,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:33,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973068709] [2021-07-09 17:32:33,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973068709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:33,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278724559] [2021-07-09 17:32:33,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:33,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:32:33,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:33,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:32:33,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:33,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:33,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:33,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:33,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:33,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:33,713 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:33,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:33,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:33,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:33,735 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:33,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:33,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:33,757 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:33,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:33,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:33,775 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:32:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:33,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278724559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:33,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:33,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:33,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556279925] [2021-07-09 17:32:33,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:33,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:33,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:33,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:33,861 INFO L87 Difference]: Start difference. First operand 152 states and 329 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:34,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:34,182 INFO L93 Difference]: Finished difference Result 180 states and 378 transitions. [2021-07-09 17:32:34,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:32:34,183 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:34,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:34,183 INFO L225 Difference]: With dead ends: 180 [2021-07-09 17:32:34,183 INFO L226 Difference]: Without dead ends: 166 [2021-07-09 17:32:34,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 479.7ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-09 17:32:34,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 152. [2021-07-09 17:32:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1788079470198674) internal successors, (329), 151 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 329 transitions. [2021-07-09 17:32:34,185 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 329 transitions. Word has length 18 [2021-07-09 17:32:34,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:34,185 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 329 transitions. [2021-07-09 17:32:34,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:34,185 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 329 transitions. [2021-07-09 17:32:34,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:34,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:34,185 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:34,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1431 [2021-07-09 17:32:34,386 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:34,386 INFO L82 PathProgramCache]: Analyzing trace with hash 143726942, now seen corresponding path program 265 times [2021-07-09 17:32:34,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:34,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263389985] [2021-07-09 17:32:34,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:34,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:34,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263389985] [2021-07-09 17:32:34,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263389985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:34,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727050243] [2021-07-09 17:32:34,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:34,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:34,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:34,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:34,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:34,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:34,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:34,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:34,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:34,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:34,782 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:32:34,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:34,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:34,786 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:34,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:34,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:34,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:34,809 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:34,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:34,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:34,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:34,833 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:34,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:34,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:34,853 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:34,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727050243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:34,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:34,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:34,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48710067] [2021-07-09 17:32:34,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:34,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:34,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:34,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:34,921 INFO L87 Difference]: Start difference. First operand 152 states and 329 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:35,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:35,286 INFO L93 Difference]: Finished difference Result 206 states and 426 transitions. [2021-07-09 17:32:35,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:32:35,286 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:35,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:35,287 INFO L225 Difference]: With dead ends: 206 [2021-07-09 17:32:35,287 INFO L226 Difference]: Without dead ends: 187 [2021-07-09 17:32:35,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 486.8ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:32:35,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-07-09 17:32:35,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 152. [2021-07-09 17:32:35,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1788079470198674) internal successors, (329), 151 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:35,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 329 transitions. [2021-07-09 17:32:35,289 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 329 transitions. Word has length 18 [2021-07-09 17:32:35,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:35,289 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 329 transitions. [2021-07-09 17:32:35,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:35,289 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 329 transitions. [2021-07-09 17:32:35,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:35,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:35,289 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:35,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1438 [2021-07-09 17:32:35,489 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:35,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:35,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1570553646, now seen corresponding path program 266 times [2021-07-09 17:32:35,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:35,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581310185] [2021-07-09 17:32:35,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:35,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:35,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581310185] [2021-07-09 17:32:35,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581310185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:35,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137524340] [2021-07-09 17:32:35,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:35,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:35,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:35,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:32:35,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:35,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:35,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:35,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:35,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:35,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:35,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:32:35,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:35,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:35,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:35,801 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:32:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:35,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137524340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:35,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:35,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:35,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292188691] [2021-07-09 17:32:35,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:35,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:35,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:35,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:35,834 INFO L87 Difference]: Start difference. First operand 152 states and 329 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:36,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:36,021 INFO L93 Difference]: Finished difference Result 172 states and 364 transitions. [2021-07-09 17:32:36,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:36,022 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:36,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:36,022 INFO L225 Difference]: With dead ends: 172 [2021-07-09 17:32:36,022 INFO L226 Difference]: Without dead ends: 165 [2021-07-09 17:32:36,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 314.9ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:32:36,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-07-09 17:32:36,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 156. [2021-07-09 17:32:36,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1806451612903226) internal successors, (338), 155 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:36,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 338 transitions. [2021-07-09 17:32:36,024 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 338 transitions. Word has length 18 [2021-07-09 17:32:36,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:36,024 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 338 transitions. [2021-07-09 17:32:36,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:36,024 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 338 transitions. [2021-07-09 17:32:36,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:36,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:36,024 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:36,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1443 [2021-07-09 17:32:36,241 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:36,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:36,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1588228378, now seen corresponding path program 267 times [2021-07-09 17:32:36,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:36,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092465590] [2021-07-09 17:32:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:36,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:36,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:36,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092465590] [2021-07-09 17:32:36,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092465590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:36,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841878986] [2021-07-09 17:32:36,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:36,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:32:36,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:36,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:36,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:36,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:36,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:36,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:36,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:36,545 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,597 INFO L628 ElimStorePlain]: treesize reduction 77, result has 47.6 percent of original size [2021-07-09 17:32:36,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:36,601 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:36,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:36,605 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:36,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:36,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:36,627 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:36,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841878986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:36,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:36,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:36,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930854097] [2021-07-09 17:32:36,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:36,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:36,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:36,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:36,697 INFO L87 Difference]: Start difference. First operand 156 states and 338 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:36,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:36,900 INFO L93 Difference]: Finished difference Result 178 states and 373 transitions. [2021-07-09 17:32:36,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:36,901 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:36,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:36,901 INFO L225 Difference]: With dead ends: 178 [2021-07-09 17:32:36,901 INFO L226 Difference]: Without dead ends: 166 [2021-07-09 17:32:36,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 336.5ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:32:36,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-09 17:32:36,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2021-07-09 17:32:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.175324675324675) internal successors, (335), 154 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:36,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 335 transitions. [2021-07-09 17:32:36,903 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 335 transitions. Word has length 18 [2021-07-09 17:32:36,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:36,903 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 335 transitions. [2021-07-09 17:32:36,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:36,903 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 335 transitions. [2021-07-09 17:32:36,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:36,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:36,903 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:37,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1444 [2021-07-09 17:32:37,104 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:37,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:37,104 INFO L82 PathProgramCache]: Analyzing trace with hash 560568158, now seen corresponding path program 268 times [2021-07-09 17:32:37,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:37,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15284721] [2021-07-09 17:32:37,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:37,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:37,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15284721] [2021-07-09 17:32:37,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15284721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:37,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126780134] [2021-07-09 17:32:37,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:37,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:37,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:37,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:37,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:37,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:37,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:37,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:37,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:37,469 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:32:37,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:37,473 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:37,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:37,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:37,499 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:37,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:37,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:37,523 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:37,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:37,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:37,544 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:37,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126780134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:37,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:37,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:37,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762426723] [2021-07-09 17:32:37,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:37,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:37,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:37,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:37,612 INFO L87 Difference]: Start difference. First operand 155 states and 335 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:37,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:37,952 INFO L93 Difference]: Finished difference Result 203 states and 420 transitions. [2021-07-09 17:32:37,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:32:37,952 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:37,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:37,952 INFO L225 Difference]: With dead ends: 203 [2021-07-09 17:32:37,952 INFO L226 Difference]: Without dead ends: 184 [2021-07-09 17:32:37,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 436.4ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:37,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-07-09 17:32:37,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 154. [2021-07-09 17:32:37,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.176470588235294) internal successors, (333), 153 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:37,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 333 transitions. [2021-07-09 17:32:37,954 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 333 transitions. Word has length 18 [2021-07-09 17:32:37,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:37,954 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 333 transitions. [2021-07-09 17:32:37,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:37,954 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 333 transitions. [2021-07-09 17:32:37,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:37,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:37,955 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:38,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1447 [2021-07-09 17:32:38,155 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:38,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:38,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1546215962, now seen corresponding path program 269 times [2021-07-09 17:32:38,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:38,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341415189] [2021-07-09 17:32:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:38,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:38,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:38,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341415189] [2021-07-09 17:32:38,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341415189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:38,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847093158] [2021-07-09 17:32:38,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:38,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:32:38,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:38,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:38,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:38,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:38,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:38,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:38,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:38,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:38,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:38,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:38,545 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-07-09 17:32:38,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:38,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:38,549 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:38,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:38,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:38,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:38,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:38,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:38,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:38,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:38,598 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:38,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:38,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:38,618 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:38,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:38,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847093158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:38,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:38,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:38,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499299064] [2021-07-09 17:32:38,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:38,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:38,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:38,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:38,693 INFO L87 Difference]: Start difference. First operand 154 states and 333 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:39,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:39,169 INFO L93 Difference]: Finished difference Result 206 states and 426 transitions. [2021-07-09 17:32:39,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:39,170 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:39,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:39,170 INFO L225 Difference]: With dead ends: 206 [2021-07-09 17:32:39,170 INFO L226 Difference]: Without dead ends: 187 [2021-07-09 17:32:39,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 544.7ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:32:39,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-07-09 17:32:39,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 154. [2021-07-09 17:32:39,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.176470588235294) internal successors, (333), 153 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 333 transitions. [2021-07-09 17:32:39,172 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 333 transitions. Word has length 18 [2021-07-09 17:32:39,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:39,172 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 333 transitions. [2021-07-09 17:32:39,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:39,172 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 333 transitions. [2021-07-09 17:32:39,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:39,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:39,172 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:39,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1452,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:39,373 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:39,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:39,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1862953054, now seen corresponding path program 270 times [2021-07-09 17:32:39,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:39,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334149850] [2021-07-09 17:32:39,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:39,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:39,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334149850] [2021-07-09 17:32:39,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334149850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:39,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003440277] [2021-07-09 17:32:39,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:39,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:32:39,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:39,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:39,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:39,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:39,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:39,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:39,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:39,842 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:32:39,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:39,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:39,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:39,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:39,870 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:39,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:39,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:39,893 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:39,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:39,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:39,914 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:39,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003440277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:39,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:39,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:32:39,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490151239] [2021-07-09 17:32:39,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:32:39,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:39,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:32:39,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:39,992 INFO L87 Difference]: Start difference. First operand 154 states and 333 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:40,647 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2021-07-09 17:32:40,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:40,980 INFO L93 Difference]: Finished difference Result 272 states and 540 transitions. [2021-07-09 17:32:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:32:40,980 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:40,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:40,981 INFO L225 Difference]: With dead ends: 272 [2021-07-09 17:32:40,981 INFO L226 Difference]: Without dead ends: 232 [2021-07-09 17:32:40,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1053.8ms TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:32:40,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-07-09 17:32:40,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 160. [2021-07-09 17:32:40,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2138364779874213) internal successors, (352), 159 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:40,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 352 transitions. [2021-07-09 17:32:40,983 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 352 transitions. Word has length 18 [2021-07-09 17:32:40,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:40,983 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 352 transitions. [2021-07-09 17:32:40,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:40,983 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 352 transitions. [2021-07-09 17:32:40,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:40,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:40,983 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:41,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1457 [2021-07-09 17:32:41,184 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:41,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:41,184 INFO L82 PathProgramCache]: Analyzing trace with hash 289867306, now seen corresponding path program 271 times [2021-07-09 17:32:41,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:41,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715875232] [2021-07-09 17:32:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:41,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:41,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715875232] [2021-07-09 17:32:41,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715875232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:41,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128541022] [2021-07-09 17:32:41,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:41,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:41,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:41,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:41,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:41,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:41,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:41,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:41,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:41,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:41,485 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:32:41,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:41,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:41,487 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:41,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:41,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:41,495 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:32:41,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:41,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128541022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:41,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:41,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:41,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580571735] [2021-07-09 17:32:41,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:41,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:41,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:41,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:41,532 INFO L87 Difference]: Start difference. First operand 160 states and 352 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:41,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:41,797 INFO L93 Difference]: Finished difference Result 184 states and 390 transitions. [2021-07-09 17:32:41,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:41,797 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:41,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:41,798 INFO L225 Difference]: With dead ends: 184 [2021-07-09 17:32:41,798 INFO L226 Difference]: Without dead ends: 168 [2021-07-09 17:32:41,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 318.7ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:41,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-09 17:32:41,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 161. [2021-07-09 17:32:41,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2125) internal successors, (354), 160 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:41,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 354 transitions. [2021-07-09 17:32:41,799 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 354 transitions. Word has length 18 [2021-07-09 17:32:41,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:41,799 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 354 transitions. [2021-07-09 17:32:41,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:41,800 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 354 transitions. [2021-07-09 17:32:41,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:41,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:41,800 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:42,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1462 [2021-07-09 17:32:42,000 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:42,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:42,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1151872370, now seen corresponding path program 272 times [2021-07-09 17:32:42,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:42,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160965049] [2021-07-09 17:32:42,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:42,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:42,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160965049] [2021-07-09 17:32:42,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160965049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:42,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208505760] [2021-07-09 17:32:42,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:42,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:42,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:42,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:32:42,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:42,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:42,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:42,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:42,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:42,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:42,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:42,306 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:42,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:42,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:42,313 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:32:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:42,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208505760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:42,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:42,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:42,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805056926] [2021-07-09 17:32:42,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:42,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:42,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:42,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:42,349 INFO L87 Difference]: Start difference. First operand 161 states and 354 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:42,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:42,742 INFO L93 Difference]: Finished difference Result 189 states and 406 transitions. [2021-07-09 17:32:42,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:42,742 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:42,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:42,743 INFO L225 Difference]: With dead ends: 189 [2021-07-09 17:32:42,743 INFO L226 Difference]: Without dead ends: 182 [2021-07-09 17:32:42,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 444.2ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:32:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-07-09 17:32:42,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 162. [2021-07-09 17:32:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.217391304347826) internal successors, (357), 161 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:42,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 357 transitions. [2021-07-09 17:32:42,745 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 357 transitions. Word has length 18 [2021-07-09 17:32:42,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:42,745 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 357 transitions. [2021-07-09 17:32:42,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:42,745 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 357 transitions. [2021-07-09 17:32:42,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:42,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:42,745 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:42,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1463 [2021-07-09 17:32:42,946 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:42,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:42,946 INFO L82 PathProgramCache]: Analyzing trace with hash -2006909654, now seen corresponding path program 273 times [2021-07-09 17:32:42,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:42,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756941863] [2021-07-09 17:32:42,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:43,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:43,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756941863] [2021-07-09 17:32:43,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756941863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:43,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181044422] [2021-07-09 17:32:43,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:43,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:32:43,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:43,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:32:43,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:43,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:43,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:43,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:43,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:43,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:43,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:43,282 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:43,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:43,285 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:43,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:43,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:43,304 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:32:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:43,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181044422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:43,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:43,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:43,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492873834] [2021-07-09 17:32:43,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:43,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:43,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:43,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:43,388 INFO L87 Difference]: Start difference. First operand 162 states and 357 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:43,820 INFO L93 Difference]: Finished difference Result 193 states and 413 transitions. [2021-07-09 17:32:43,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:43,820 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:43,820 INFO L225 Difference]: With dead ends: 193 [2021-07-09 17:32:43,820 INFO L226 Difference]: Without dead ends: 186 [2021-07-09 17:32:43,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 559.7ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:32:43,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-07-09 17:32:43,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 162. [2021-07-09 17:32:43,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.217391304347826) internal successors, (357), 161 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:43,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 357 transitions. [2021-07-09 17:32:43,822 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 357 transitions. Word has length 18 [2021-07-09 17:32:43,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:43,822 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 357 transitions. [2021-07-09 17:32:43,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:43,822 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 357 transitions. [2021-07-09 17:32:43,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:43,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:43,823 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:44,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1464 [2021-07-09 17:32:44,023 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:44,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:44,023 INFO L82 PathProgramCache]: Analyzing trace with hash -954911750, now seen corresponding path program 274 times [2021-07-09 17:32:44,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:44,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852995800] [2021-07-09 17:32:44,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:44,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:44,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852995800] [2021-07-09 17:32:44,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852995800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:44,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452947415] [2021-07-09 17:32:44,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:44,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:44,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:44,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:44,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:44,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:44,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:44,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:44,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:44,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:44,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:44,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:44,299 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:32:44,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:44,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:44,302 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:44,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:44,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:44,309 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:32:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:44,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452947415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:44,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:44,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:44,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743695336] [2021-07-09 17:32:44,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:44,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:44,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:44,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:44,344 INFO L87 Difference]: Start difference. First operand 162 states and 357 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:44,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:44,659 INFO L93 Difference]: Finished difference Result 191 states and 410 transitions. [2021-07-09 17:32:44,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:44,660 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:44,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:44,660 INFO L225 Difference]: With dead ends: 191 [2021-07-09 17:32:44,660 INFO L226 Difference]: Without dead ends: 178 [2021-07-09 17:32:44,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 341.7ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:44,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-07-09 17:32:44,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2021-07-09 17:32:44,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.214723926380368) internal successors, (361), 163 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:44,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 361 transitions. [2021-07-09 17:32:44,662 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 361 transitions. Word has length 18 [2021-07-09 17:32:44,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:44,662 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 361 transitions. [2021-07-09 17:32:44,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:44,662 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 361 transitions. [2021-07-09 17:32:44,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:44,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:44,662 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:44,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1469,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:44,863 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:44,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:44,863 INFO L82 PathProgramCache]: Analyzing trace with hash 181273522, now seen corresponding path program 275 times [2021-07-09 17:32:44,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:44,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228816232] [2021-07-09 17:32:44,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:45,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:45,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228816232] [2021-07-09 17:32:45,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228816232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:45,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106164277] [2021-07-09 17:32:45,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:45,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:32:45,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:45,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:45,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:45,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:45,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:45,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:45,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:45,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:45,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:45,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:45,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:45,213 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-07-09 17:32:45,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:45,217 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:45,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:45,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:45,221 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:45,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:45,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:45,243 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:45,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106164277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:45,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:45,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:45,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561508152] [2021-07-09 17:32:45,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:45,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:45,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:45,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:45,315 INFO L87 Difference]: Start difference. First operand 164 states and 361 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:45,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:45,745 INFO L93 Difference]: Finished difference Result 213 states and 437 transitions. [2021-07-09 17:32:45,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:45,746 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:45,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:45,746 INFO L225 Difference]: With dead ends: 213 [2021-07-09 17:32:45,746 INFO L226 Difference]: Without dead ends: 189 [2021-07-09 17:32:45,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 554.9ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:32:45,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-07-09 17:32:45,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 161. [2021-07-09 17:32:45,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.21875) internal successors, (355), 160 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 355 transitions. [2021-07-09 17:32:45,748 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 355 transitions. Word has length 18 [2021-07-09 17:32:45,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:45,748 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 355 transitions. [2021-07-09 17:32:45,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:45,748 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 355 transitions. [2021-07-09 17:32:45,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:45,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:45,748 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:45,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1470,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:45,949 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:45,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:45,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1964897238, now seen corresponding path program 276 times [2021-07-09 17:32:45,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:45,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110067970] [2021-07-09 17:32:45,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:46,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:46,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110067970] [2021-07-09 17:32:46,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110067970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:46,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117903949] [2021-07-09 17:32:46,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:46,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:32:46,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:46,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:46,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:46,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:46,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:46,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:46,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:46,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:46,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:46,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:46,305 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:32:46,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:46,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:46,309 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:46,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:46,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:46,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:46,336 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:46,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:46,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:46,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:46,361 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:46,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:46,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:46,381 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:46,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117903949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:46,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:46,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:46,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773268935] [2021-07-09 17:32:46,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:46,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:46,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:46,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:46,455 INFO L87 Difference]: Start difference. First operand 161 states and 355 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:46,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:46,916 INFO L93 Difference]: Finished difference Result 221 states and 462 transitions. [2021-07-09 17:32:46,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:32:46,916 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:46,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:46,917 INFO L225 Difference]: With dead ends: 221 [2021-07-09 17:32:46,917 INFO L226 Difference]: Without dead ends: 202 [2021-07-09 17:32:46,917 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 527.5ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:32:46,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-09 17:32:46,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 159. [2021-07-09 17:32:46,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.221518987341772) internal successors, (351), 158 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:46,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-07-09 17:32:46,919 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 18 [2021-07-09 17:32:46,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:46,919 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-07-09 17:32:46,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:46,919 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-07-09 17:32:46,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:46,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:46,919 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:47,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1473 [2021-07-09 17:32:47,120 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:47,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:47,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1840710030, now seen corresponding path program 277 times [2021-07-09 17:32:47,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:47,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910366687] [2021-07-09 17:32:47,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:47,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:47,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:47,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910366687] [2021-07-09 17:32:47,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910366687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:47,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151049904] [2021-07-09 17:32:47,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:47,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:47,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:47,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:47,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:47,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:47,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:47,406 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-07-09 17:32:47,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:47,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:32:47,408 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:47,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:47,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:47,415 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:32:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:47,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151049904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:47,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:47,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:47,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59537991] [2021-07-09 17:32:47,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:47,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:47,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:47,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:47,450 INFO L87 Difference]: Start difference. First operand 159 states and 351 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:47,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:47,752 INFO L93 Difference]: Finished difference Result 186 states and 399 transitions. [2021-07-09 17:32:47,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:47,752 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:47,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:47,752 INFO L225 Difference]: With dead ends: 186 [2021-07-09 17:32:47,752 INFO L226 Difference]: Without dead ends: 173 [2021-07-09 17:32:47,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 355.5ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:47,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-07-09 17:32:47,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 162. [2021-07-09 17:32:47,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.217391304347826) internal successors, (357), 161 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:47,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 357 transitions. [2021-07-09 17:32:47,754 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 357 transitions. Word has length 18 [2021-07-09 17:32:47,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:47,754 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 357 transitions. [2021-07-09 17:32:47,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:47,754 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 357 transitions. [2021-07-09 17:32:47,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:47,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:47,755 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:47,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1478 [2021-07-09 17:32:47,955 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:47,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:47,955 INFO L82 PathProgramCache]: Analyzing trace with hash -704524758, now seen corresponding path program 278 times [2021-07-09 17:32:47,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:47,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455781016] [2021-07-09 17:32:47,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:48,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:48,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455781016] [2021-07-09 17:32:48,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455781016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:48,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5207587] [2021-07-09 17:32:48,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:48,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:48,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:48,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:32:48,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:48,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:48,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:48,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:48,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:48,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:48,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:48,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:48,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:48,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:48,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:48,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:48,269 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:48,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:48,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:48,273 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:48,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:48,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:48,294 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:32:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:48,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5207587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:48,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:48,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:48,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270369990] [2021-07-09 17:32:48,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:48,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:48,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:48,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:48,371 INFO L87 Difference]: Start difference. First operand 162 states and 357 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:48,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:48,717 INFO L93 Difference]: Finished difference Result 184 states and 398 transitions. [2021-07-09 17:32:48,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:48,717 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:48,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:48,717 INFO L225 Difference]: With dead ends: 184 [2021-07-09 17:32:48,717 INFO L226 Difference]: Without dead ends: 177 [2021-07-09 17:32:48,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 420.3ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:48,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-07-09 17:32:48,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 162. [2021-07-09 17:32:48,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.217391304347826) internal successors, (357), 161 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:48,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 357 transitions. [2021-07-09 17:32:48,719 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 357 transitions. Word has length 18 [2021-07-09 17:32:48,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:48,719 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 357 transitions. [2021-07-09 17:32:48,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:48,719 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 357 transitions. [2021-07-09 17:32:48,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:48,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:48,720 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:48,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1479,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:48,920 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:48,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:48,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1444271778, now seen corresponding path program 279 times [2021-07-09 17:32:48,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:48,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544213058] [2021-07-09 17:32:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:49,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:49,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544213058] [2021-07-09 17:32:49,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544213058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:49,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382865995] [2021-07-09 17:32:49,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:49,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:32:49,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:49,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:32:49,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:49,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:49,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:49,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:49,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:49,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:49,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:49,224 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:49,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:49,227 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:49,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:49,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:49,248 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:32:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:49,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382865995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:49,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:49,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:49,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005426849] [2021-07-09 17:32:49,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:49,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:49,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:49,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:49,318 INFO L87 Difference]: Start difference. First operand 162 states and 357 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:49,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:49,778 INFO L93 Difference]: Finished difference Result 202 states and 434 transitions. [2021-07-09 17:32:49,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:49,779 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:49,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:49,779 INFO L225 Difference]: With dead ends: 202 [2021-07-09 17:32:49,779 INFO L226 Difference]: Without dead ends: 191 [2021-07-09 17:32:49,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 537.6ms TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:32:49,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-07-09 17:32:49,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 162. [2021-07-09 17:32:49,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.217391304347826) internal successors, (357), 161 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:49,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 357 transitions. [2021-07-09 17:32:49,781 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 357 transitions. Word has length 18 [2021-07-09 17:32:49,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:49,781 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 357 transitions. [2021-07-09 17:32:49,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:49,781 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 357 transitions. [2021-07-09 17:32:49,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:49,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:49,781 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:49,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1482,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:49,990 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:49,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:49,991 INFO L82 PathProgramCache]: Analyzing trace with hash -662512342, now seen corresponding path program 280 times [2021-07-09 17:32:49,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:49,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760989528] [2021-07-09 17:32:49,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:50,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:50,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760989528] [2021-07-09 17:32:50,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760989528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:50,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689561845] [2021-07-09 17:32:50,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:50,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:50,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:50,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:50,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:50,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:50,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:50,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:50,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:50,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:50,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:50,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:50,350 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:32:50,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:50,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:50,354 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:50,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:50,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:50,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:50,379 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:50,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:50,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:50,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:50,404 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:50,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:50,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:50,426 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:50,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689561845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:50,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:50,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:50,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043620627] [2021-07-09 17:32:50,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:50,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:50,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:50,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:50,512 INFO L87 Difference]: Start difference. First operand 162 states and 357 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:50,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:50,857 INFO L93 Difference]: Finished difference Result 219 states and 463 transitions. [2021-07-09 17:32:50,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:32:50,857 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:50,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:50,858 INFO L225 Difference]: With dead ends: 219 [2021-07-09 17:32:50,858 INFO L226 Difference]: Without dead ends: 200 [2021-07-09 17:32:50,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 423.4ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:50,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-09 17:32:50,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 163. [2021-07-09 17:32:50,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.2222222222222223) internal successors, (360), 162 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:50,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 360 transitions. [2021-07-09 17:32:50,860 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 360 transitions. Word has length 18 [2021-07-09 17:32:50,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:50,860 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 360 transitions. [2021-07-09 17:32:50,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:50,860 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 360 transitions. [2021-07-09 17:32:50,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:50,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:50,860 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:51,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1485 [2021-07-09 17:32:51,061 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:51,061 INFO L82 PathProgramCache]: Analyzing trace with hash 764314362, now seen corresponding path program 281 times [2021-07-09 17:32:51,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:51,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328983478] [2021-07-09 17:32:51,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:51,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:51,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328983478] [2021-07-09 17:32:51,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328983478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:51,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589095231] [2021-07-09 17:32:51,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:51,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:32:51,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:51,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:51,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:51,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:51,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:51,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:51,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:51,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:51,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:51,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:51,378 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:32:51,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:51,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:51,381 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:51,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:51,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:51,388 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:32:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:51,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589095231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:51,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:51,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 17:32:51,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168141012] [2021-07-09 17:32:51,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:32:51,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:51,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:32:51,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:51,422 INFO L87 Difference]: Start difference. First operand 163 states and 360 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:51,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:51,746 INFO L93 Difference]: Finished difference Result 203 states and 431 transitions. [2021-07-09 17:32:51,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:51,747 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:51,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:51,747 INFO L225 Difference]: With dead ends: 203 [2021-07-09 17:32:51,747 INFO L226 Difference]: Without dead ends: 184 [2021-07-09 17:32:51,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 377.9ms TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:51,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-07-09 17:32:51,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 168. [2021-07-09 17:32:51,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.215568862275449) internal successors, (370), 167 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:51,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 370 transitions. [2021-07-09 17:32:51,749 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 370 transitions. Word has length 18 [2021-07-09 17:32:51,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:51,749 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 370 transitions. [2021-07-09 17:32:51,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:51,749 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 370 transitions. [2021-07-09 17:32:51,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:51,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:51,749 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:51,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1490,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:51,950 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:51,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:51,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1900499634, now seen corresponding path program 282 times [2021-07-09 17:32:51,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:51,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741269109] [2021-07-09 17:32:51,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:52,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:52,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741269109] [2021-07-09 17:32:52,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741269109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:52,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474229331] [2021-07-09 17:32:52,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:52,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:32:52,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:52,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:32:52,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:52,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:52,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:52,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:52,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:52,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:52,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:52,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:52,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:52,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:52,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:52,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:52,251 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:52,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:52,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:52,255 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:52,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:52,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:52,275 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:32:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:52,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474229331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:52,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:52,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:52,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158990088] [2021-07-09 17:32:52,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:52,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:52,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:52,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:52,366 INFO L87 Difference]: Start difference. First operand 168 states and 370 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:52,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:52,773 INFO L93 Difference]: Finished difference Result 198 states and 427 transitions. [2021-07-09 17:32:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:52,773 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:52,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:52,773 INFO L225 Difference]: With dead ends: 198 [2021-07-09 17:32:52,774 INFO L226 Difference]: Without dead ends: 191 [2021-07-09 17:32:52,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 457.3ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:32:52,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-07-09 17:32:52,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 167. [2021-07-09 17:32:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.216867469879518) internal successors, (368), 166 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:52,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 368 transitions. [2021-07-09 17:32:52,775 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 368 transitions. Word has length 18 [2021-07-09 17:32:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:52,776 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 368 transitions. [2021-07-09 17:32:52,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:52,776 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 368 transitions. [2021-07-09 17:32:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:52,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:52,776 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:52,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1491,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:52,977 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:52,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:52,977 INFO L82 PathProgramCache]: Analyzing trace with hash -245671126, now seen corresponding path program 283 times [2021-07-09 17:32:52,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:52,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724683107] [2021-07-09 17:32:52,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:53,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:53,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724683107] [2021-07-09 17:32:53,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724683107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:53,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438355967] [2021-07-09 17:32:53,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:53,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:53,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:53,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:53,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:53,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:53,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:53,378 INFO L628 ElimStorePlain]: treesize reduction 91, result has 43.1 percent of original size [2021-07-09 17:32:53,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:53,382 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:53,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:53,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:32:53,407 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:53,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:53,427 INFO L518 ElimStorePlain]: Eliminatee v_prenex_236 vanished before elimination [2021-07-09 17:32:53,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:53,428 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:173, output treesize:36 [2021-07-09 17:32:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:53,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438355967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:53,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:53,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:53,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855983466] [2021-07-09 17:32:53,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:53,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:53,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:53,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:53,501 INFO L87 Difference]: Start difference. First operand 167 states and 368 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:54,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:54,064 INFO L93 Difference]: Finished difference Result 233 states and 486 transitions. [2021-07-09 17:32:54,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:32:54,064 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:54,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:54,065 INFO L225 Difference]: With dead ends: 233 [2021-07-09 17:32:54,065 INFO L226 Difference]: Without dead ends: 211 [2021-07-09 17:32:54,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 684.5ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:32:54,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-09 17:32:54,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 165. [2021-07-09 17:32:54,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.2195121951219514) internal successors, (364), 164 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 364 transitions. [2021-07-09 17:32:54,067 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 364 transitions. Word has length 18 [2021-07-09 17:32:54,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:54,067 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 364 transitions. [2021-07-09 17:32:54,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:54,067 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 364 transitions. [2021-07-09 17:32:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:54,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:54,067 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:54,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1496 [2021-07-09 17:32:54,267 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:54,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:54,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1942512050, now seen corresponding path program 284 times [2021-07-09 17:32:54,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:54,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605297277] [2021-07-09 17:32:54,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:54,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:54,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605297277] [2021-07-09 17:32:54,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605297277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:54,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298838767] [2021-07-09 17:32:54,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:54,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:54,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:54,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:32:54,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:54,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:54,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:54,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:54,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:54,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:54,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:54,558 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:54,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:54,561 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:54,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:54,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:54,583 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:32:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:54,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298838767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:54,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:54,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:54,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011849545] [2021-07-09 17:32:54,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:54,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:54,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:54,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:54,659 INFO L87 Difference]: Start difference. First operand 165 states and 364 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:55,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:55,107 INFO L93 Difference]: Finished difference Result 198 states and 430 transitions. [2021-07-09 17:32:55,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:55,107 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:55,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:55,108 INFO L225 Difference]: With dead ends: 198 [2021-07-09 17:32:55,108 INFO L226 Difference]: Without dead ends: 189 [2021-07-09 17:32:55,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 479.6ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:32:55,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-07-09 17:32:55,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 166. [2021-07-09 17:32:55,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.224242424242424) internal successors, (367), 165 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:55,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 367 transitions. [2021-07-09 17:32:55,110 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 367 transitions. Word has length 18 [2021-07-09 17:32:55,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:55,110 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 367 transitions. [2021-07-09 17:32:55,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:55,110 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 367 transitions. [2021-07-09 17:32:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:55,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:55,110 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:55,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1501 [2021-07-09 17:32:55,324 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:55,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:55,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1056713770, now seen corresponding path program 285 times [2021-07-09 17:32:55,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:55,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498315598] [2021-07-09 17:32:55,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:55,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:55,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498315598] [2021-07-09 17:32:55,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498315598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:55,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893807485] [2021-07-09 17:32:55,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:55,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:32:55,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:55,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:32:55,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:55,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:55,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:55,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:55,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:55,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:55,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:55,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:55,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:55,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:55,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:55,750 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:55,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:55,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:55,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:55,771 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:55,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:55,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:55,789 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:32:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:55,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893807485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:55,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:55,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:32:55,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851386876] [2021-07-09 17:32:55,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:32:55,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:55,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:32:55,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:55,874 INFO L87 Difference]: Start difference. First operand 166 states and 367 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:56,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:56,176 INFO L93 Difference]: Finished difference Result 204 states and 435 transitions. [2021-07-09 17:32:56,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:32:56,176 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:56,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:56,177 INFO L225 Difference]: With dead ends: 204 [2021-07-09 17:32:56,177 INFO L226 Difference]: Without dead ends: 190 [2021-07-09 17:32:56,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 446.7ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:32:56,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-07-09 17:32:56,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 167. [2021-07-09 17:32:56,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.2289156626506026) internal successors, (370), 166 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:56,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 370 transitions. [2021-07-09 17:32:56,179 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 370 transitions. Word has length 18 [2021-07-09 17:32:56,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:56,179 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 370 transitions. [2021-07-09 17:32:56,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:56,179 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 370 transitions. [2021-07-09 17:32:56,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:56,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:56,179 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:56,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1504 [2021-07-09 17:32:56,380 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:56,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:56,380 INFO L82 PathProgramCache]: Analyzing trace with hash -508619346, now seen corresponding path program 286 times [2021-07-09 17:32:56,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:56,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592224958] [2021-07-09 17:32:56,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:56,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:56,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592224958] [2021-07-09 17:32:56,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592224958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:56,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305697485] [2021-07-09 17:32:56,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:56,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:56,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:56,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:56,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:56,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:56,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:56,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:56,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:56,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:56,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:56,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:56,682 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-07-09 17:32:56,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:56,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:56,685 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:56,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:56,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:56,692 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:32:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:56,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305697485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:56,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:56,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 17:32:56,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253851529] [2021-07-09 17:32:56,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:32:56,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:56,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:32:56,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:56,726 INFO L87 Difference]: Start difference. First operand 167 states and 370 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:56,992 INFO L93 Difference]: Finished difference Result 193 states and 412 transitions. [2021-07-09 17:32:56,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:56,992 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:56,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:56,992 INFO L225 Difference]: With dead ends: 193 [2021-07-09 17:32:56,993 INFO L226 Difference]: Without dead ends: 180 [2021-07-09 17:32:56,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 353.2ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:56,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-07-09 17:32:56,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 168. [2021-07-09 17:32:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2275449101796405) internal successors, (372), 167 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 372 transitions. [2021-07-09 17:32:56,994 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 372 transitions. Word has length 18 [2021-07-09 17:32:56,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:56,994 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 372 transitions. [2021-07-09 17:32:56,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:56,994 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 372 transitions. [2021-07-09 17:32:56,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:56,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:56,995 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:57,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1511,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:57,195 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:57,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:57,195 INFO L82 PathProgramCache]: Analyzing trace with hash 627565926, now seen corresponding path program 287 times [2021-07-09 17:32:57,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:57,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26402670] [2021-07-09 17:32:57,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:57,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:57,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26402670] [2021-07-09 17:32:57,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26402670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:57,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128468798] [2021-07-09 17:32:57,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:57,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:32:57,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:57,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:57,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:57,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:57,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:57,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:57,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:57,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:57,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:57,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:57,481 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:57,531 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-07-09 17:32:57,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:32:57,535 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:57,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:57,539 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:57,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:57,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:57,561 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:57,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128468798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:57,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:57,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 17:32:57,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789713054] [2021-07-09 17:32:57,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:32:57,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:57,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:32:57,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:57,633 INFO L87 Difference]: Start difference. First operand 168 states and 372 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:58,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:58,135 INFO L93 Difference]: Finished difference Result 228 states and 470 transitions. [2021-07-09 17:32:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:32:58,136 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:58,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:58,136 INFO L225 Difference]: With dead ends: 228 [2021-07-09 17:32:58,136 INFO L226 Difference]: Without dead ends: 204 [2021-07-09 17:32:58,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 571.2ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:32:58,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-07-09 17:32:58,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 163. [2021-07-09 17:32:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.234567901234568) internal successors, (362), 162 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 362 transitions. [2021-07-09 17:32:58,138 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 362 transitions. Word has length 18 [2021-07-09 17:32:58,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:58,138 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 362 transitions. [2021-07-09 17:32:58,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:58,138 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 362 transitions. [2021-07-09 17:32:58,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:58,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:58,138 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:58,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1512 [2021-07-09 17:32:58,351 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:58,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:58,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1518604834, now seen corresponding path program 288 times [2021-07-09 17:32:58,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:58,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256143886] [2021-07-09 17:32:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:58,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:58,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256143886] [2021-07-09 17:32:58,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256143886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:58,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590628661] [2021-07-09 17:32:58,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:58,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:32:58,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:58,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:58,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:58,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:58,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:58,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:58,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:58,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:58,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:58,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:58,704 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:32:58,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:58,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:58,708 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:58,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:58,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:58,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:58,733 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:58,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:58,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:58,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:32:58,757 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:32:58,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:58,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:58,778 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:32:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:58,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590628661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:58,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:58,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 17:32:58,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396900898] [2021-07-09 17:32:58,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:32:58,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:58,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:32:58,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:58,850 INFO L87 Difference]: Start difference. First operand 163 states and 362 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:59,468 INFO L93 Difference]: Finished difference Result 244 states and 502 transitions. [2021-07-09 17:32:59,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:32:59,469 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:59,469 INFO L225 Difference]: With dead ends: 244 [2021-07-09 17:32:59,469 INFO L226 Difference]: Without dead ends: 218 [2021-07-09 17:32:59,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 678.3ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:32:59,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-07-09 17:32:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 168. [2021-07-09 17:32:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2395209580838324) internal successors, (374), 167 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 374 transitions. [2021-07-09 17:32:59,471 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 374 transitions. Word has length 18 [2021-07-09 17:32:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:59,471 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 374 transitions. [2021-07-09 17:32:59,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:59,471 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 374 transitions. [2021-07-09 17:32:59,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:59,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:59,471 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:59,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1515,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:59,672 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:59,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:59,672 INFO L82 PathProgramCache]: Analyzing trace with hash 669578342, now seen corresponding path program 289 times [2021-07-09 17:32:59,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:59,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975037693] [2021-07-09 17:32:59,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:59,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:59,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975037693] [2021-07-09 17:32:59,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975037693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:59,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355810885] [2021-07-09 17:32:59,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:59,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:32:59,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:59,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:59,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:59,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:59,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:00,019 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:33:00,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:00,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:00,023 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:00,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:00,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:00,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:00,049 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:00,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:00,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:00,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:33:00,073 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:00,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:00,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:00,094 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:33:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:00,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355810885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:00,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:00,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 17:33:00,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169481012] [2021-07-09 17:33:00,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:00,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:00,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:00,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:00,167 INFO L87 Difference]: Start difference. First operand 168 states and 374 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:00,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:00,530 INFO L93 Difference]: Finished difference Result 215 states and 459 transitions. [2021-07-09 17:33:00,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:33:00,530 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:00,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:00,531 INFO L225 Difference]: With dead ends: 215 [2021-07-09 17:33:00,531 INFO L226 Difference]: Without dead ends: 200 [2021-07-09 17:33:00,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 418.9ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:00,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-09 17:33:00,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 167. [2021-07-09 17:33:00,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.2349397590361444) internal successors, (371), 166 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:00,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 371 transitions. [2021-07-09 17:33:00,533 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 371 transitions. Word has length 18 [2021-07-09 17:33:00,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:00,533 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 371 transitions. [2021-07-09 17:33:00,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:00,533 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 371 transitions. [2021-07-09 17:33:00,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:00,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:00,533 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:00,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1520 [2021-07-09 17:33:00,733 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:00,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:00,734 INFO L82 PathProgramCache]: Analyzing trace with hash -216219938, now seen corresponding path program 290 times [2021-07-09 17:33:00,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:00,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135247932] [2021-07-09 17:33:00,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:00,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:00,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135247932] [2021-07-09 17:33:00,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135247932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:00,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198821970] [2021-07-09 17:33:00,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:00,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:00,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:00,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:33:00,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:01,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:01,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:01,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:01,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:01,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:01,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:01,076 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:01,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:33:01,080 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:01,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:01,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:01,100 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:33:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:01,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198821970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:01,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:01,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 17:33:01,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711097608] [2021-07-09 17:33:01,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:01,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:01,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:01,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:01,175 INFO L87 Difference]: Start difference. First operand 167 states and 371 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:02,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:02,212 INFO L93 Difference]: Finished difference Result 290 states and 589 transitions. [2021-07-09 17:33:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:33:02,212 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:02,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:02,213 INFO L225 Difference]: With dead ends: 290 [2021-07-09 17:33:02,213 INFO L226 Difference]: Without dead ends: 253 [2021-07-09 17:33:02,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1036.3ms TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:33:02,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-07-09 17:33:02,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 171. [2021-07-09 17:33:02,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.2529411764705882) internal successors, (383), 170 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:02,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 383 transitions. [2021-07-09 17:33:02,215 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 383 transitions. Word has length 18 [2021-07-09 17:33:02,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:02,215 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 383 transitions. [2021-07-09 17:33:02,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:02,215 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 383 transitions. [2021-07-09 17:33:02,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:02,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:02,216 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:02,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1525,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:02,429 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:02,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:02,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1543833002, now seen corresponding path program 291 times [2021-07-09 17:33:02,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:02,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610528777] [2021-07-09 17:33:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:02,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:02,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610528777] [2021-07-09 17:33:02,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610528777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:02,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558378170] [2021-07-09 17:33:02,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:02,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:33:02,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:02,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:33:02,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:02,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:02,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:02,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:02,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:02,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:02,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:33:02,864 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:02,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:02,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:02,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:02,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:02,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:02,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:02,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:33:02,909 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:02,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:02,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:02,927 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:33:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:03,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558378170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:03,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:03,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 17:33:03,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790514119] [2021-07-09 17:33:03,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:03,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:03,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:03,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:03,019 INFO L87 Difference]: Start difference. First operand 171 states and 383 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:03,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:03,285 INFO L93 Difference]: Finished difference Result 240 states and 509 transitions. [2021-07-09 17:33:03,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:03,285 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:03,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:03,286 INFO L225 Difference]: With dead ends: 240 [2021-07-09 17:33:03,286 INFO L226 Difference]: Without dead ends: 226 [2021-07-09 17:33:03,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 459.0ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:33:03,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-07-09 17:33:03,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 174. [2021-07-09 17:33:03,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2485549132947975) internal successors, (389), 173 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:03,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 389 transitions. [2021-07-09 17:33:03,288 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 389 transitions. Word has length 18 [2021-07-09 17:33:03,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:03,288 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 389 transitions. [2021-07-09 17:33:03,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:03,288 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 389 transitions. [2021-07-09 17:33:03,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:03,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:03,288 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:03,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1528 [2021-07-09 17:33:03,489 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:03,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:03,489 INFO L82 PathProgramCache]: Analyzing trace with hash 444669190, now seen corresponding path program 292 times [2021-07-09 17:33:03,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:03,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005550143] [2021-07-09 17:33:03,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:03,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:03,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005550143] [2021-07-09 17:33:03,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005550143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:03,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923146339] [2021-07-09 17:33:03,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:03,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:03,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:03,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:03,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:03,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:33:03,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:03,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:33:03,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:03,673 INFO L628 ElimStorePlain]: treesize reduction 22, result has 29.0 percent of original size [2021-07-09 17:33:03,673 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:03,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:03,674 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:9 [2021-07-09 17:33:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:03,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923146339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:03,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:03,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-09 17:33:03,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728141914] [2021-07-09 17:33:03,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:33:03,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:03,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:33:03,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:33:03,688 INFO L87 Difference]: Start difference. First operand 174 states and 389 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:03,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:03,815 INFO L93 Difference]: Finished difference Result 221 states and 476 transitions. [2021-07-09 17:33:03,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:03,815 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:03,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:03,815 INFO L225 Difference]: With dead ends: 221 [2021-07-09 17:33:03,815 INFO L226 Difference]: Without dead ends: 221 [2021-07-09 17:33:03,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:03,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-07-09 17:33:03,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 175. [2021-07-09 17:33:03,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2528735632183907) internal successors, (392), 174 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:03,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 392 transitions. [2021-07-09 17:33:03,817 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 392 transitions. Word has length 19 [2021-07-09 17:33:03,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:03,817 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 392 transitions. [2021-07-09 17:33:03,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:03,817 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 392 transitions. [2021-07-09 17:33:03,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:03,818 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:03,818 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:04,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1535,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:04,018 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:04,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:04,018 INFO L82 PathProgramCache]: Analyzing trace with hash 537921546, now seen corresponding path program 293 times [2021-07-09 17:33:04,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:04,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333984291] [2021-07-09 17:33:04,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:04,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:04,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333984291] [2021-07-09 17:33:04,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333984291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:04,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264952307] [2021-07-09 17:33:04,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:04,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:33:04,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:04,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:04,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:04,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264952307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:04,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:04,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:04,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402286483] [2021-07-09 17:33:04,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:04,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:04,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:04,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:04,288 INFO L87 Difference]: Start difference. First operand 175 states and 392 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:04,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:04,776 INFO L93 Difference]: Finished difference Result 218 states and 464 transitions. [2021-07-09 17:33:04,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:04,776 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:04,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:04,777 INFO L225 Difference]: With dead ends: 218 [2021-07-09 17:33:04,777 INFO L226 Difference]: Without dead ends: 206 [2021-07-09 17:33:04,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 513.4ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:33:04,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-07-09 17:33:04,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 174. [2021-07-09 17:33:04,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2485549132947975) internal successors, (389), 173 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:04,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 389 transitions. [2021-07-09 17:33:04,779 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 389 transitions. Word has length 19 [2021-07-09 17:33:04,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:04,779 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 389 transitions. [2021-07-09 17:33:04,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:04,779 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 389 transitions. [2021-07-09 17:33:04,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:04,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:04,779 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:04,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1537 [2021-07-09 17:33:04,979 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:04,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:04,980 INFO L82 PathProgramCache]: Analyzing trace with hash -520230954, now seen corresponding path program 294 times [2021-07-09 17:33:04,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:04,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489965850] [2021-07-09 17:33:04,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:05,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:05,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489965850] [2021-07-09 17:33:05,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489965850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:05,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692907130] [2021-07-09 17:33:05,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:05,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:33:05,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:05,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:05,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:05,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:05,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:05,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,231 INFO L628 ElimStorePlain]: treesize reduction 38, result has 28.3 percent of original size [2021-07-09 17:33:05,231 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:05,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,231 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:33:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:05,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692907130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:05,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:05,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:05,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058760951] [2021-07-09 17:33:05,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:05,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:05,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:05,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:05,248 INFO L87 Difference]: Start difference. First operand 174 states and 389 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:05,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:05,455 INFO L93 Difference]: Finished difference Result 238 states and 510 transitions. [2021-07-09 17:33:05,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:33:05,455 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:05,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:05,455 INFO L225 Difference]: With dead ends: 238 [2021-07-09 17:33:05,455 INFO L226 Difference]: Without dead ends: 238 [2021-07-09 17:33:05,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 232.5ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:33:05,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-09 17:33:05,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 175. [2021-07-09 17:33:05,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2471264367816093) internal successors, (391), 174 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:05,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 391 transitions. [2021-07-09 17:33:05,458 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 391 transitions. Word has length 19 [2021-07-09 17:33:05,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:05,459 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 391 transitions. [2021-07-09 17:33:05,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:05,459 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 391 transitions. [2021-07-09 17:33:05,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:05,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:05,459 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:05,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1542,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:05,675 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:05,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:05,675 INFO L82 PathProgramCache]: Analyzing trace with hash -453676026, now seen corresponding path program 295 times [2021-07-09 17:33:05,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:05,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173446088] [2021-07-09 17:33:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:05,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:05,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173446088] [2021-07-09 17:33:05,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173446088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:05,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155462024] [2021-07-09 17:33:05,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:05,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:05,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:05,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:05,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:05,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,941 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:33:05,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:33:05,944 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:05,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:05,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,950 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:33:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:05,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155462024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:05,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:05,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:05,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906883242] [2021-07-09 17:33:05,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:05,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:05,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:05,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:05,966 INFO L87 Difference]: Start difference. First operand 175 states and 391 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:06,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:06,214 INFO L93 Difference]: Finished difference Result 235 states and 504 transitions. [2021-07-09 17:33:06,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:33:06,215 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:06,215 INFO L225 Difference]: With dead ends: 235 [2021-07-09 17:33:06,215 INFO L226 Difference]: Without dead ends: 235 [2021-07-09 17:33:06,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 241.3ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:33:06,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-07-09 17:33:06,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 176. [2021-07-09 17:33:06,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2457142857142856) internal successors, (393), 175 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 393 transitions. [2021-07-09 17:33:06,217 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 393 transitions. Word has length 19 [2021-07-09 17:33:06,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:06,217 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 393 transitions. [2021-07-09 17:33:06,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:06,217 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 393 transitions. [2021-07-09 17:33:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:06,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:06,218 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:06,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1544 [2021-07-09 17:33:06,418 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:06,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:06,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1698455082, now seen corresponding path program 296 times [2021-07-09 17:33:06,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:06,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677079819] [2021-07-09 17:33:06,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:06,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:06,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677079819] [2021-07-09 17:33:06,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677079819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:06,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570574422] [2021-07-09 17:33:06,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:06,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:06,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:06,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:06,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:06,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:06,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:06,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:06,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:06,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:06,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:06,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:06,698 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-07-09 17:33:06,698 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:06,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:06,699 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:33:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:06,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570574422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:06,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:06,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:06,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963252996] [2021-07-09 17:33:06,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:06,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:06,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:06,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:06,716 INFO L87 Difference]: Start difference. First operand 176 states and 393 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:06,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:06,930 INFO L93 Difference]: Finished difference Result 232 states and 498 transitions. [2021-07-09 17:33:06,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:33:06,931 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:06,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:06,931 INFO L225 Difference]: With dead ends: 232 [2021-07-09 17:33:06,931 INFO L226 Difference]: Without dead ends: 232 [2021-07-09 17:33:06,931 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 260.8ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:33:06,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-07-09 17:33:06,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 177. [2021-07-09 17:33:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2443181818181817) internal successors, (395), 176 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 395 transitions. [2021-07-09 17:33:06,933 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 395 transitions. Word has length 19 [2021-07-09 17:33:06,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:06,933 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 395 transitions. [2021-07-09 17:33:06,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:06,933 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 395 transitions. [2021-07-09 17:33:06,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:06,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:06,934 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:07,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1546 [2021-07-09 17:33:07,134 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:07,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:07,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1810458194, now seen corresponding path program 297 times [2021-07-09 17:33:07,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:07,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322415987] [2021-07-09 17:33:07,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:07,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:07,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322415987] [2021-07-09 17:33:07,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322415987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:07,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707462656] [2021-07-09 17:33:07,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:07,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:33:07,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:07,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:07,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:07,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:07,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:07,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,469 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:33:07,469 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:07,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:33:07,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:07,483 INFO L518 ElimStorePlain]: Eliminatee v_prenex_256 vanished before elimination [2021-07-09 17:33:07,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:07,484 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:33:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:07,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707462656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:07,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:07,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:07,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835132406] [2021-07-09 17:33:07,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:07,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:07,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:07,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:07,513 INFO L87 Difference]: Start difference. First operand 177 states and 395 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:08,193 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-07-09 17:33:08,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:08,328 INFO L93 Difference]: Finished difference Result 227 states and 479 transitions. [2021-07-09 17:33:08,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:33:08,329 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:08,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:08,329 INFO L225 Difference]: With dead ends: 227 [2021-07-09 17:33:08,329 INFO L226 Difference]: Without dead ends: 224 [2021-07-09 17:33:08,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 800.0ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:33:08,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-09 17:33:08,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 182. [2021-07-09 17:33:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.2430939226519335) internal successors, (406), 181 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:08,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 406 transitions. [2021-07-09 17:33:08,331 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 406 transitions. Word has length 19 [2021-07-09 17:33:08,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:08,331 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 406 transitions. [2021-07-09 17:33:08,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:08,331 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 406 transitions. [2021-07-09 17:33:08,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:08,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:08,331 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:08,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1548,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:08,532 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:08,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:08,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1586526726, now seen corresponding path program 298 times [2021-07-09 17:33:08,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:08,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370758102] [2021-07-09 17:33:08,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:08,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:08,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370758102] [2021-07-09 17:33:08,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370758102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:08,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533116448] [2021-07-09 17:33:08,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:08,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:08,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:08,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:08,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:08,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:08,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:08,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:08,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:08,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:08,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:08,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:08,824 INFO L628 ElimStorePlain]: treesize reduction 78, result has 35.5 percent of original size [2021-07-09 17:33:08,825 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:08,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:33:08,827 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:08,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:08,842 INFO L518 ElimStorePlain]: Eliminatee v_prenex_259 vanished before elimination [2021-07-09 17:33:08,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:08,843 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:33:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:08,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533116448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:08,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:08,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:08,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733737270] [2021-07-09 17:33:08,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:08,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:08,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:08,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:08,885 INFO L87 Difference]: Start difference. First operand 182 states and 406 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:09,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:09,158 INFO L93 Difference]: Finished difference Result 233 states and 501 transitions. [2021-07-09 17:33:09,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:33:09,158 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:09,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:09,159 INFO L225 Difference]: With dead ends: 233 [2021-07-09 17:33:09,159 INFO L226 Difference]: Without dead ends: 233 [2021-07-09 17:33:09,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 302.8ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:33:09,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-07-09 17:33:09,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 182. [2021-07-09 17:33:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.2430939226519335) internal successors, (406), 181 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:09,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 406 transitions. [2021-07-09 17:33:09,161 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 406 transitions. Word has length 19 [2021-07-09 17:33:09,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:09,161 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 406 transitions. [2021-07-09 17:33:09,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:09,161 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 406 transitions. [2021-07-09 17:33:09,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:09,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:09,161 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:09,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1556,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:09,362 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:09,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:09,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1348323830, now seen corresponding path program 299 times [2021-07-09 17:33:09,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:09,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525452621] [2021-07-09 17:33:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:09,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:09,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525452621] [2021-07-09 17:33:09,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525452621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:09,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36660744] [2021-07-09 17:33:09,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:09,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:09,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:09,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:09,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:09,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:09,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:09,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,722 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:33:09,722 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:09,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:33:09,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:09,736 INFO L518 ElimStorePlain]: Eliminatee v_prenex_262 vanished before elimination [2021-07-09 17:33:09,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:09,737 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:33:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:09,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36660744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:09,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:09,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:09,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901233820] [2021-07-09 17:33:09,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:09,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:09,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:09,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:09,778 INFO L87 Difference]: Start difference. First operand 182 states and 406 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:10,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:10,278 INFO L93 Difference]: Finished difference Result 212 states and 458 transitions. [2021-07-09 17:33:10,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:10,279 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:10,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:10,279 INFO L225 Difference]: With dead ends: 212 [2021-07-09 17:33:10,279 INFO L226 Difference]: Without dead ends: 212 [2021-07-09 17:33:10,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 578.6ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:33:10,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-07-09 17:33:10,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 178. [2021-07-09 17:33:10,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2429378531073447) internal successors, (397), 177 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 397 transitions. [2021-07-09 17:33:10,281 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 397 transitions. Word has length 19 [2021-07-09 17:33:10,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:10,281 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 397 transitions. [2021-07-09 17:33:10,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:10,281 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 397 transitions. [2021-07-09 17:33:10,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:10,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:10,282 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:10,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1560,300 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:10,482 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:10,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:10,482 INFO L82 PathProgramCache]: Analyzing trace with hash -944542190, now seen corresponding path program 300 times [2021-07-09 17:33:10,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:10,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209715497] [2021-07-09 17:33:10,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:10,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:10,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209715497] [2021-07-09 17:33:10,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209715497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:10,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204633965] [2021-07-09 17:33:10,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:10,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:33:10,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:10,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:10,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:10,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:10,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:10,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:10,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:10,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:10,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:10,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:10,746 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-07-09 17:33:10,746 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:10,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:10,747 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:33:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:10,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204633965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:10,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:10,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:10,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073445389] [2021-07-09 17:33:10,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:10,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:10,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:10,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:10,762 INFO L87 Difference]: Start difference. First operand 178 states and 397 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:10,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:10,901 INFO L93 Difference]: Finished difference Result 201 states and 441 transitions. [2021-07-09 17:33:10,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:10,901 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:10,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:10,901 INFO L225 Difference]: With dead ends: 201 [2021-07-09 17:33:10,901 INFO L226 Difference]: Without dead ends: 201 [2021-07-09 17:33:10,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:10,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-07-09 17:33:10,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 178. [2021-07-09 17:33:10,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2429378531073447) internal successors, (397), 177 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:10,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 397 transitions. [2021-07-09 17:33:10,903 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 397 transitions. Word has length 19 [2021-07-09 17:33:10,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:10,903 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 397 transitions. [2021-07-09 17:33:10,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:10,903 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 397 transitions. [2021-07-09 17:33:10,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:10,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:10,904 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:11,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1567,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:11,104 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:11,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:11,104 INFO L82 PathProgramCache]: Analyzing trace with hash -428211314, now seen corresponding path program 301 times [2021-07-09 17:33:11,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:11,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910740855] [2021-07-09 17:33:11,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:11,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:11,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:11,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910740855] [2021-07-09 17:33:11,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910740855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:11,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974006122] [2021-07-09 17:33:11,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:11,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:11,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:11,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:11,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974006122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:11,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:11,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:11,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87647037] [2021-07-09 17:33:11,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:11,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:11,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:11,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:11,368 INFO L87 Difference]: Start difference. First operand 178 states and 397 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:11,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:11,695 INFO L93 Difference]: Finished difference Result 194 states and 421 transitions. [2021-07-09 17:33:11,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:11,695 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:11,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:11,696 INFO L225 Difference]: With dead ends: 194 [2021-07-09 17:33:11,696 INFO L226 Difference]: Without dead ends: 185 [2021-07-09 17:33:11,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 355.0ms TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:33:11,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-07-09 17:33:11,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 177. [2021-07-09 17:33:11,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2386363636363638) internal successors, (394), 176 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:11,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 394 transitions. [2021-07-09 17:33:11,697 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 394 transitions. Word has length 19 [2021-07-09 17:33:11,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:11,698 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 394 transitions. [2021-07-09 17:33:11,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:11,698 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 394 transitions. [2021-07-09 17:33:11,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:11,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:11,698 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:11,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1569,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:11,898 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:11,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:11,899 INFO L82 PathProgramCache]: Analyzing trace with hash -877987262, now seen corresponding path program 302 times [2021-07-09 17:33:11,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:11,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778837126] [2021-07-09 17:33:11,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:11,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:11,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778837126] [2021-07-09 17:33:11,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778837126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:11,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407445337] [2021-07-09 17:33:11,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:11,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:11,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:11,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:11,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:12,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:12,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:12,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:12,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:12,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:12,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:12,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:12,142 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-07-09 17:33:12,142 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:12,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:12,143 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:33:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:12,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407445337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:12,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:12,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:12,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607392589] [2021-07-09 17:33:12,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:12,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:12,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:12,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:12,160 INFO L87 Difference]: Start difference. First operand 177 states and 394 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:12,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:12,315 INFO L93 Difference]: Finished difference Result 217 states and 472 transitions. [2021-07-09 17:33:12,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:12,315 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:12,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:12,315 INFO L225 Difference]: With dead ends: 217 [2021-07-09 17:33:12,316 INFO L226 Difference]: Without dead ends: 217 [2021-07-09 17:33:12,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:12,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-07-09 17:33:12,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 178. [2021-07-09 17:33:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-07-09 17:33:12,322 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-07-09 17:33:12,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:12,322 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-07-09 17:33:12,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:12,322 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-07-09 17:33:12,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:12,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:12,323 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:12,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1575,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:12,523 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:12,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:12,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2122766318, now seen corresponding path program 303 times [2021-07-09 17:33:12,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:12,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356833445] [2021-07-09 17:33:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:12,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:12,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356833445] [2021-07-09 17:33:12,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356833445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:12,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103485294] [2021-07-09 17:33:12,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:12,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:33:12,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:12,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:12,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:12,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103485294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:12,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:12,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:12,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043940733] [2021-07-09 17:33:12,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:12,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:12,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:12,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:12,763 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:12,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:12,887 INFO L93 Difference]: Finished difference Result 214 states and 466 transitions. [2021-07-09 17:33:12,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:12,887 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:12,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:12,888 INFO L225 Difference]: With dead ends: 214 [2021-07-09 17:33:12,888 INFO L226 Difference]: Without dead ends: 214 [2021-07-09 17:33:12,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:12,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-07-09 17:33:12,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 179. [2021-07-09 17:33:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.235955056179775) internal successors, (398), 178 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:12,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 398 transitions. [2021-07-09 17:33:12,890 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 398 transitions. Word has length 19 [2021-07-09 17:33:12,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:12,890 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 398 transitions. [2021-07-09 17:33:12,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:12,890 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 398 transitions. [2021-07-09 17:33:12,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:12,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:12,890 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:13,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1577 [2021-07-09 17:33:13,091 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:13,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:13,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1386146958, now seen corresponding path program 304 times [2021-07-09 17:33:13,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:13,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980062278] [2021-07-09 17:33:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:13,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:13,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980062278] [2021-07-09 17:33:13,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980062278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:13,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263533726] [2021-07-09 17:33:13,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:13,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:13,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:13,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:13,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:13,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:13,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:13,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:13,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:13,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:13,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:13,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:13,391 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:33:13,391 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:13,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:33:13,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:13,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:13,405 INFO L518 ElimStorePlain]: Eliminatee v_prenex_268 vanished before elimination [2021-07-09 17:33:13,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:13,405 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:33:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:13,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263533726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:13,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:13,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:13,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755660174] [2021-07-09 17:33:13,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:13,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:13,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:13,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:13,434 INFO L87 Difference]: Start difference. First operand 179 states and 398 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:13,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:13,920 INFO L93 Difference]: Finished difference Result 205 states and 439 transitions. [2021-07-09 17:33:13,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:33:13,921 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:13,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:13,921 INFO L225 Difference]: With dead ends: 205 [2021-07-09 17:33:13,921 INFO L226 Difference]: Without dead ends: 202 [2021-07-09 17:33:13,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 490.2ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:33:13,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-09 17:33:13,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 184. [2021-07-09 17:33:13,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.2349726775956285) internal successors, (409), 183 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 409 transitions. [2021-07-09 17:33:13,923 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 409 transitions. Word has length 19 [2021-07-09 17:33:13,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:13,923 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 409 transitions. [2021-07-09 17:33:13,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:13,923 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 409 transitions. [2021-07-09 17:33:13,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:13,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:13,924 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:14,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1581,305 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:14,140 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:14,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:14,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1162215490, now seen corresponding path program 305 times [2021-07-09 17:33:14,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:14,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637252755] [2021-07-09 17:33:14,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:14,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:14,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637252755] [2021-07-09 17:33:14,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637252755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:14,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463713155] [2021-07-09 17:33:14,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:14,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:14,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:14,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:14,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:14,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463713155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:14,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:14,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:14,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364186807] [2021-07-09 17:33:14,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:14,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:14,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:14,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:14,394 INFO L87 Difference]: Start difference. First operand 184 states and 409 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:14,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:14,542 INFO L93 Difference]: Finished difference Result 215 states and 469 transitions. [2021-07-09 17:33:14,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:14,542 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:14,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:14,543 INFO L225 Difference]: With dead ends: 215 [2021-07-09 17:33:14,543 INFO L226 Difference]: Without dead ends: 215 [2021-07-09 17:33:14,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:14,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-07-09 17:33:14,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 184. [2021-07-09 17:33:14,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.2349726775956285) internal successors, (409), 183 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:14,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 409 transitions. [2021-07-09 17:33:14,545 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 409 transitions. Word has length 19 [2021-07-09 17:33:14,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:14,545 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 409 transitions. [2021-07-09 17:33:14,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:14,545 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 409 transitions. [2021-07-09 17:33:14,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:14,545 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:14,545 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:14,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1589 [2021-07-09 17:33:14,746 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:14,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:14,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1772635066, now seen corresponding path program 306 times [2021-07-09 17:33:14,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:14,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687020201] [2021-07-09 17:33:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:14,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:14,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687020201] [2021-07-09 17:33:14,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687020201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:14,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763511870] [2021-07-09 17:33:14,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:14,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:33:14,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:14,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:14,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:15,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:15,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:15,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:15,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:15,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:15,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:15,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:15,064 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.7 percent of original size [2021-07-09 17:33:15,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:15,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:33:15,070 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:15,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:15,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:33:15,088 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:15,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:15,101 INFO L518 ElimStorePlain]: Eliminatee v_prenex_272 vanished before elimination [2021-07-09 17:33:15,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:15,102 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-07-09 17:33:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:15,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763511870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:15,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:15,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:15,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152508068] [2021-07-09 17:33:15,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:15,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:15,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:15,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:15,143 INFO L87 Difference]: Start difference. First operand 184 states and 409 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:15,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:15,255 INFO L93 Difference]: Finished difference Result 190 states and 418 transitions. [2021-07-09 17:33:15,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:15,255 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:15,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:15,255 INFO L225 Difference]: With dead ends: 190 [2021-07-09 17:33:15,255 INFO L226 Difference]: Without dead ends: 190 [2021-07-09 17:33:15,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:15,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-07-09 17:33:15,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 176. [2021-07-09 17:33:15,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.24) internal successors, (392), 175 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:15,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 392 transitions. [2021-07-09 17:33:15,257 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 392 transitions. Word has length 19 [2021-07-09 17:33:15,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:15,257 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 392 transitions. [2021-07-09 17:33:15,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:15,257 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 392 transitions. [2021-07-09 17:33:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:15,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:15,258 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:15,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1599 [2021-07-09 17:33:15,458 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:15,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:15,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1727037130, now seen corresponding path program 307 times [2021-07-09 17:33:15,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:15,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699543788] [2021-07-09 17:33:15,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:15,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:15,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699543788] [2021-07-09 17:33:15,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699543788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:15,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120107946] [2021-07-09 17:33:15,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:15,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:15,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:15,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:15,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:15,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:15,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:15,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:15,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:15,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:15,684 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-07-09 17:33:15,684 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:15,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:15,685 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:33:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:15,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120107946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:15,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:15,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:15,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289633563] [2021-07-09 17:33:15,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:15,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:15,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:15,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:15,701 INFO L87 Difference]: Start difference. First operand 176 states and 392 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:15,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:15,872 INFO L93 Difference]: Finished difference Result 208 states and 454 transitions. [2021-07-09 17:33:15,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:15,872 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:15,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:15,872 INFO L225 Difference]: With dead ends: 208 [2021-07-09 17:33:15,872 INFO L226 Difference]: Without dead ends: 208 [2021-07-09 17:33:15,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:15,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-09 17:33:15,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 177. [2021-07-09 17:33:15,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2386363636363638) internal successors, (394), 176 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:15,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 394 transitions. [2021-07-09 17:33:15,874 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 394 transitions. Word has length 19 [2021-07-09 17:33:15,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:15,874 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 394 transitions. [2021-07-09 17:33:15,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:15,874 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 394 transitions. [2021-07-09 17:33:15,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:15,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:15,875 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:16,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1605,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:16,075 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:16,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:16,075 INFO L82 PathProgramCache]: Analyzing trace with hash 482258074, now seen corresponding path program 308 times [2021-07-09 17:33:16,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:16,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586026982] [2021-07-09 17:33:16,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:16,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:16,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586026982] [2021-07-09 17:33:16,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586026982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:16,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440122684] [2021-07-09 17:33:16,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:16,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:16,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:16,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:16,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:16,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:16,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:16,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:16,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:16,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:16,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:16,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:16,319 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-07-09 17:33:16,319 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:16,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:16,320 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:33:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:16,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440122684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:16,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:16,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:16,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113512803] [2021-07-09 17:33:16,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:16,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:16,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:16,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:16,336 INFO L87 Difference]: Start difference. First operand 177 states and 394 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:16,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:16,759 INFO L93 Difference]: Finished difference Result 228 states and 494 transitions. [2021-07-09 17:33:16,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:33:16,760 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:16,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:16,760 INFO L225 Difference]: With dead ends: 228 [2021-07-09 17:33:16,760 INFO L226 Difference]: Without dead ends: 228 [2021-07-09 17:33:16,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 337.5ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:33:16,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-09 17:33:16,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 178. [2021-07-09 17:33:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-07-09 17:33:16,762 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-07-09 17:33:16,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:16,762 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-07-09 17:33:16,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:16,762 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-07-09 17:33:16,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:16,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:16,763 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:16,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1607,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:16,963 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:16,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:16,963 INFO L82 PathProgramCache]: Analyzing trace with hash 122341556, now seen corresponding path program 309 times [2021-07-09 17:33:16,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:16,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780784001] [2021-07-09 17:33:16,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:17,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:17,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780784001] [2021-07-09 17:33:17,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780784001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:17,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623671915] [2021-07-09 17:33:17,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:17,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:33:17,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:17,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:17,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:17,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623671915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:17,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:17,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:17,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900008421] [2021-07-09 17:33:17,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:17,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:17,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:17,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:17,243 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:17,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:17,704 INFO L93 Difference]: Finished difference Result 224 states and 487 transitions. [2021-07-09 17:33:17,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:33:17,704 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:17,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:17,704 INFO L225 Difference]: With dead ends: 224 [2021-07-09 17:33:17,704 INFO L226 Difference]: Without dead ends: 224 [2021-07-09 17:33:17,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 359.1ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:17,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-09 17:33:17,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 179. [2021-07-09 17:33:17,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.235955056179775) internal successors, (398), 178 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:17,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 398 transitions. [2021-07-09 17:33:17,706 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 398 transitions. Word has length 19 [2021-07-09 17:33:17,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:17,707 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 398 transitions. [2021-07-09 17:33:17,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:17,707 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 398 transitions. [2021-07-09 17:33:17,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:17,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:17,707 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:17,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1609,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:17,907 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:17,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:17,908 INFO L82 PathProgramCache]: Analyzing trace with hash 832389326, now seen corresponding path program 310 times [2021-07-09 17:33:17,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:17,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845579471] [2021-07-09 17:33:17,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:17,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:17,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845579471] [2021-07-09 17:33:17,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845579471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:17,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442583389] [2021-07-09 17:33:17,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:18,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:18,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:18,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:18,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:18,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:18,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:18,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:18,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:18,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:18,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:18,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:18,184 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:33:18,184 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:18,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:33:18,186 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:18,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:18,198 INFO L518 ElimStorePlain]: Eliminatee v_prenex_277 vanished before elimination [2021-07-09 17:33:18,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:18,199 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:33:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:18,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442583389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:18,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:18,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:18,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728266392] [2021-07-09 17:33:18,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:18,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:18,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:18,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:18,226 INFO L87 Difference]: Start difference. First operand 179 states and 398 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:18,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:18,629 INFO L93 Difference]: Finished difference Result 197 states and 432 transitions. [2021-07-09 17:33:18,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:33:18,629 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:18,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:18,630 INFO L225 Difference]: With dead ends: 197 [2021-07-09 17:33:18,630 INFO L226 Difference]: Without dead ends: 197 [2021-07-09 17:33:18,630 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 392.3ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:33:18,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-09 17:33:18,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 176. [2021-07-09 17:33:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.24) internal successors, (392), 175 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 392 transitions. [2021-07-09 17:33:18,632 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 392 transitions. Word has length 19 [2021-07-09 17:33:18,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:18,632 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 392 transitions. [2021-07-09 17:33:18,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:18,632 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 392 transitions. [2021-07-09 17:33:18,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:18,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:18,632 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:18,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1619,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:18,833 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:18,833 INFO L82 PathProgramCache]: Analyzing trace with hash -403540206, now seen corresponding path program 311 times [2021-07-09 17:33:18,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:18,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771669014] [2021-07-09 17:33:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:18,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:18,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771669014] [2021-07-09 17:33:18,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771669014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:18,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445335798] [2021-07-09 17:33:18,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:18,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:18,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:18,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:18,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:19,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445335798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:19,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:19,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:19,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999426181] [2021-07-09 17:33:19,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:19,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:19,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:19,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:19,052 INFO L87 Difference]: Start difference. First operand 176 states and 392 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:19,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:19,300 INFO L93 Difference]: Finished difference Result 213 states and 464 transitions. [2021-07-09 17:33:19,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:33:19,300 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:19,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:19,300 INFO L225 Difference]: With dead ends: 213 [2021-07-09 17:33:19,300 INFO L226 Difference]: Without dead ends: 213 [2021-07-09 17:33:19,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 242.5ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:33:19,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-09 17:33:19,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 178. [2021-07-09 17:33:19,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:19,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-07-09 17:33:19,302 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-07-09 17:33:19,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:19,303 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-07-09 17:33:19,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:19,303 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-07-09 17:33:19,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:19,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:19,303 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:19,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1626 [2021-07-09 17:33:19,510 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:19,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:19,511 INFO L82 PathProgramCache]: Analyzing trace with hash -763456724, now seen corresponding path program 312 times [2021-07-09 17:33:19,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:19,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947518090] [2021-07-09 17:33:19,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:19,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:19,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947518090] [2021-07-09 17:33:19,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947518090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:19,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950553039] [2021-07-09 17:33:19,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:19,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:33:19,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:19,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:19,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:19,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:19,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:19,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:19,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:19,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:19,760 INFO L628 ElimStorePlain]: treesize reduction 80, result has 35.0 percent of original size [2021-07-09 17:33:19,760 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:19,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:33:19,762 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:19,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:19,776 INFO L518 ElimStorePlain]: Eliminatee v_prenex_279 vanished before elimination [2021-07-09 17:33:19,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:19,778 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:33:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:19,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950553039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:19,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:19,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:19,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773573462] [2021-07-09 17:33:19,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:19,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:19,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:19,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:19,817 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:20,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:20,240 INFO L93 Difference]: Finished difference Result 231 states and 500 transitions. [2021-07-09 17:33:20,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:33:20,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:20,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:20,241 INFO L225 Difference]: With dead ends: 231 [2021-07-09 17:33:20,241 INFO L226 Difference]: Without dead ends: 231 [2021-07-09 17:33:20,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:33:20,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-07-09 17:33:20,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 179. [2021-07-09 17:33:20,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.235955056179775) internal successors, (398), 178 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:20,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 398 transitions. [2021-07-09 17:33:20,243 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 398 transitions. Word has length 19 [2021-07-09 17:33:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:20,243 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 398 transitions. [2021-07-09 17:33:20,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 398 transitions. [2021-07-09 17:33:20,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:20,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:20,243 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:20,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1630 [2021-07-09 17:33:20,444 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:20,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:20,444 INFO L82 PathProgramCache]: Analyzing trace with hash -53408954, now seen corresponding path program 313 times [2021-07-09 17:33:20,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:20,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869726837] [2021-07-09 17:33:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:20,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:20,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869726837] [2021-07-09 17:33:20,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869726837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:20,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761958195] [2021-07-09 17:33:20,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:20,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:20,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:20,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:20,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:20,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:20,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:20,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:20,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:20,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:20,701 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:33:20,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:33:20,704 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:20,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:20,716 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:20,716 INFO L518 ElimStorePlain]: Eliminatee v_prenex_282 vanished before elimination [2021-07-09 17:33:20,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:20,717 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:33:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:20,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761958195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:20,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:20,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:20,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928158351] [2021-07-09 17:33:20,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:20,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:20,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:20,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:20,741 INFO L87 Difference]: Start difference. First operand 179 states and 398 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:21,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:21,114 INFO L93 Difference]: Finished difference Result 204 states and 446 transitions. [2021-07-09 17:33:21,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:33:21,114 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:21,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:21,114 INFO L225 Difference]: With dead ends: 204 [2021-07-09 17:33:21,115 INFO L226 Difference]: Without dead ends: 204 [2021-07-09 17:33:21,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 344.3ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:33:21,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-07-09 17:33:21,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 177. [2021-07-09 17:33:21,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2386363636363638) internal successors, (394), 176 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:21,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 394 transitions. [2021-07-09 17:33:21,116 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 394 transitions. Word has length 19 [2021-07-09 17:33:21,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:21,117 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 394 transitions. [2021-07-09 17:33:21,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:21,117 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 394 transitions. [2021-07-09 17:33:21,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:21,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:21,117 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:21,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1634 [2021-07-09 17:33:21,317 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:21,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:21,318 INFO L82 PathProgramCache]: Analyzing trace with hash 998588950, now seen corresponding path program 314 times [2021-07-09 17:33:21,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:21,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042519146] [2021-07-09 17:33:21,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:21,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:21,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042519146] [2021-07-09 17:33:21,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042519146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:21,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342580448] [2021-07-09 17:33:21,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:21,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:21,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:21,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:21,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:21,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:21,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:21,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:21,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:21,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:21,500 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:21,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:21,503 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:21,540 INFO L628 ElimStorePlain]: treesize reduction 69, result has 38.9 percent of original size [2021-07-09 17:33:21,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:21,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:33:21,544 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:21,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:21,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:21,560 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-07-09 17:33:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:21,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342580448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:21,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:21,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:21,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327007607] [2021-07-09 17:33:21,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:21,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:21,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:21,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:21,589 INFO L87 Difference]: Start difference. First operand 177 states and 394 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:21,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:21,878 INFO L93 Difference]: Finished difference Result 239 states and 508 transitions. [2021-07-09 17:33:21,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:33:21,879 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:21,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:21,879 INFO L225 Difference]: With dead ends: 239 [2021-07-09 17:33:21,879 INFO L226 Difference]: Without dead ends: 236 [2021-07-09 17:33:21,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 255.0ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:21,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-09 17:33:21,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 184. [2021-07-09 17:33:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.2459016393442623) internal successors, (411), 183 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 411 transitions. [2021-07-09 17:33:21,881 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 411 transitions. Word has length 19 [2021-07-09 17:33:21,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:21,881 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 411 transitions. [2021-07-09 17:33:21,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:21,881 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 411 transitions. [2021-07-09 17:33:21,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:21,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:21,882 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:22,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1641 [2021-07-09 17:33:22,082 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:22,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:22,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1424726452, now seen corresponding path program 315 times [2021-07-09 17:33:22,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:22,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896072534] [2021-07-09 17:33:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:22,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:22,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896072534] [2021-07-09 17:33:22,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896072534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:22,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662470747] [2021-07-09 17:33:22,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:22,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:33:22,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:22,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:22,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:22,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662470747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:22,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:22,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:22,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272834082] [2021-07-09 17:33:22,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:22,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:22,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:22,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:22,321 INFO L87 Difference]: Start difference. First operand 184 states and 411 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:22,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:22,653 INFO L93 Difference]: Finished difference Result 223 states and 480 transitions. [2021-07-09 17:33:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:33:22,653 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:22,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:22,654 INFO L225 Difference]: With dead ends: 223 [2021-07-09 17:33:22,654 INFO L226 Difference]: Without dead ends: 223 [2021-07-09 17:33:22,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 306.4ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:22,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-07-09 17:33:22,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 184. [2021-07-09 17:33:22,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.2459016393442623) internal successors, (411), 183 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:22,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 411 transitions. [2021-07-09 17:33:22,656 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 411 transitions. Word has length 19 [2021-07-09 17:33:22,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:22,656 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 411 transitions. [2021-07-09 17:33:22,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:22,656 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 411 transitions. [2021-07-09 17:33:22,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:22,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:22,656 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:22,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1645,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:22,857 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:22,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:22,857 INFO L82 PathProgramCache]: Analyzing trace with hash 2134774222, now seen corresponding path program 316 times [2021-07-09 17:33:22,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:22,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128529197] [2021-07-09 17:33:22,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:22,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:22,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128529197] [2021-07-09 17:33:22,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128529197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:22,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113577603] [2021-07-09 17:33:22,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:22,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:22,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:22,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:22,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:23,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:23,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:23,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:23,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:23,074 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,103 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:33:23,103 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:23,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:23,104 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:33:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:23,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113577603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:23,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:23,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:23,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685888817] [2021-07-09 17:33:23,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:23,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:23,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:23,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:23,127 INFO L87 Difference]: Start difference. First operand 184 states and 411 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:23,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:23,458 INFO L93 Difference]: Finished difference Result 249 states and 529 transitions. [2021-07-09 17:33:23,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:33:23,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:23,459 INFO L225 Difference]: With dead ends: 249 [2021-07-09 17:33:23,459 INFO L226 Difference]: Without dead ends: 249 [2021-07-09 17:33:23,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:33:23,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-09 17:33:23,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 183. [2021-07-09 17:33:23,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2472527472527473) internal successors, (409), 182 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:23,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 409 transitions. [2021-07-09 17:33:23,461 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 409 transitions. Word has length 19 [2021-07-09 17:33:23,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:23,461 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 409 transitions. [2021-07-09 17:33:23,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:23,461 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 409 transitions. [2021-07-09 17:33:23,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:23,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:23,461 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:23,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1655 [2021-07-09 17:33:23,662 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:23,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:23,662 INFO L82 PathProgramCache]: Analyzing trace with hash -98277772, now seen corresponding path program 317 times [2021-07-09 17:33:23,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:23,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334863266] [2021-07-09 17:33:23,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:23,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:23,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334863266] [2021-07-09 17:33:23,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334863266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:23,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170550545] [2021-07-09 17:33:23,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:23,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:33:23,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:23,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:23,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:23,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170550545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:23,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:23,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:23,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800311729] [2021-07-09 17:33:23,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:23,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:23,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:23,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:23,862 INFO L87 Difference]: Start difference. First operand 183 states and 409 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:24,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:24,142 INFO L93 Difference]: Finished difference Result 195 states and 427 transitions. [2021-07-09 17:33:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:33:24,142 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:24,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:24,143 INFO L225 Difference]: With dead ends: 195 [2021-07-09 17:33:24,143 INFO L226 Difference]: Without dead ends: 191 [2021-07-09 17:33:24,143 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 276.4ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:33:24,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-07-09 17:33:24,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 183. [2021-07-09 17:33:24,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.241758241758242) internal successors, (408), 182 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:24,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 408 transitions. [2021-07-09 17:33:24,145 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 408 transitions. Word has length 19 [2021-07-09 17:33:24,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:24,145 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 408 transitions. [2021-07-09 17:33:24,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:24,145 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 408 transitions. [2021-07-09 17:33:24,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:24,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:24,145 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:24,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1665 [2021-07-09 17:33:24,346 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:24,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:24,346 INFO L82 PathProgramCache]: Analyzing trace with hash -11396538, now seen corresponding path program 318 times [2021-07-09 17:33:24,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:24,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057998057] [2021-07-09 17:33:24,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:24,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:24,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057998057] [2021-07-09 17:33:24,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057998057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:24,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867323642] [2021-07-09 17:33:24,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:24,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:33:24,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:24,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:24,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:24,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:24,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:24,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:24,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:24,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:24,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:24,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:24,552 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:33:24,552 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:24,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:24,553 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:33:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:24,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867323642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:24,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:24,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:33:24,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99505473] [2021-07-09 17:33:24,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:24,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:24,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:24,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:24,559 INFO L87 Difference]: Start difference. First operand 183 states and 408 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:24,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:24,820 INFO L93 Difference]: Finished difference Result 219 states and 476 transitions. [2021-07-09 17:33:24,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:33:24,821 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:24,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:24,821 INFO L225 Difference]: With dead ends: 219 [2021-07-09 17:33:24,821 INFO L226 Difference]: Without dead ends: 219 [2021-07-09 17:33:24,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:24,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-07-09 17:33:24,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 178. [2021-07-09 17:33:24,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:24,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-07-09 17:33:24,823 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-07-09 17:33:24,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:24,823 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-07-09 17:33:24,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:24,823 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-07-09 17:33:24,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:24,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:24,823 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:25,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1669 [2021-07-09 17:33:25,024 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:25,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:25,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1213288618, now seen corresponding path program 319 times [2021-07-09 17:33:25,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:25,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965469777] [2021-07-09 17:33:25,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:25,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:25,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965469777] [2021-07-09 17:33:25,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965469777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:25,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847084318] [2021-07-09 17:33:25,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:25,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:25,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:25,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:25,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:25,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:25,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:25,281 INFO L628 ElimStorePlain]: treesize reduction 38, result has 28.3 percent of original size [2021-07-09 17:33:25,281 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:25,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:25,282 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:33:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:25,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847084318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:25,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:25,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:25,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708073450] [2021-07-09 17:33:25,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:25,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:25,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:25,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:25,298 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:25,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:25,430 INFO L93 Difference]: Finished difference Result 199 states and 437 transitions. [2021-07-09 17:33:25,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:25,430 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:25,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:25,430 INFO L225 Difference]: With dead ends: 199 [2021-07-09 17:33:25,430 INFO L226 Difference]: Without dead ends: 199 [2021-07-09 17:33:25,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:25,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-09 17:33:25,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 178. [2021-07-09 17:33:25,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:25,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-07-09 17:33:25,432 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-07-09 17:33:25,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:25,432 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-07-09 17:33:25,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:25,432 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-07-09 17:33:25,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:25,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:25,432 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:25,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1673 [2021-07-09 17:33:25,633 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:25,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:25,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1146733690, now seen corresponding path program 320 times [2021-07-09 17:33:25,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:25,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342806830] [2021-07-09 17:33:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:25,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:25,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342806830] [2021-07-09 17:33:25,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342806830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:25,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6081199] [2021-07-09 17:33:25,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:25,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:25,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:25,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:25,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:25,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:25,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:25,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:25,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:25,890 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-07-09 17:33:25,890 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:25,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:25,891 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:33:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:25,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6081199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:25,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:25,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:25,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263153207] [2021-07-09 17:33:25,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:25,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:25,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:25,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:25,907 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:26,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:26,269 INFO L93 Difference]: Finished difference Result 219 states and 477 transitions. [2021-07-09 17:33:26,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:26,269 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:26,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:26,269 INFO L225 Difference]: With dead ends: 219 [2021-07-09 17:33:26,269 INFO L226 Difference]: Without dead ends: 219 [2021-07-09 17:33:26,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 371.6ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:33:26,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-07-09 17:33:26,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 178. [2021-07-09 17:33:26,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:26,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-07-09 17:33:26,271 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-07-09 17:33:26,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:26,272 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-07-09 17:33:26,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:26,272 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-07-09 17:33:26,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:26,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:26,272 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:26,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1675,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:26,473 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:26,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:26,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1903454550, now seen corresponding path program 321 times [2021-07-09 17:33:26,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:26,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6958305] [2021-07-09 17:33:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:26,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:26,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6958305] [2021-07-09 17:33:26,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6958305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:26,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801255123] [2021-07-09 17:33:26,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:26,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:33:26,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:26,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:26,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:26,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801255123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:26,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:26,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:26,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957913057] [2021-07-09 17:33:26,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:26,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:26,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:26,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:26,734 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:27,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:27,140 INFO L93 Difference]: Finished difference Result 234 states and 507 transitions. [2021-07-09 17:33:27,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:33:27,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:27,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:27,141 INFO L225 Difference]: With dead ends: 234 [2021-07-09 17:33:27,141 INFO L226 Difference]: Without dead ends: 234 [2021-07-09 17:33:27,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 372.3ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:27,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-09 17:33:27,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 178. [2021-07-09 17:33:27,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:27,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-07-09 17:33:27,143 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-07-09 17:33:27,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:27,143 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-07-09 17:33:27,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:27,143 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-07-09 17:33:27,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:27,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:27,143 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:27,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1677 [2021-07-09 17:33:27,344 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:27,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:27,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1117400530, now seen corresponding path program 322 times [2021-07-09 17:33:27,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:27,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974862224] [2021-07-09 17:33:27,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:27,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:27,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974862224] [2021-07-09 17:33:27,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974862224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:27,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802885004] [2021-07-09 17:33:27,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:27,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:27,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:27,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:27,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:27,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:27,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:27,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:27,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:27,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:27,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:27,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:27,655 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:33:27,655 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:27,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:33:27,657 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:27,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:27,669 INFO L518 ElimStorePlain]: Eliminatee v_prenex_288 vanished before elimination [2021-07-09 17:33:27,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:27,669 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:33:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:27,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802885004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:27,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:27,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:27,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688379958] [2021-07-09 17:33:27,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:27,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:27,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:27,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:27,699 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:28,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:28,213 INFO L93 Difference]: Finished difference Result 208 states and 446 transitions. [2021-07-09 17:33:28,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:28,213 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:28,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:28,213 INFO L225 Difference]: With dead ends: 208 [2021-07-09 17:33:28,214 INFO L226 Difference]: Without dead ends: 205 [2021-07-09 17:33:28,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 524.1ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:33:28,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-09 17:33:28,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 183. [2021-07-09 17:33:28,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2362637362637363) internal successors, (407), 182 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:28,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 407 transitions. [2021-07-09 17:33:28,215 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 407 transitions. Word has length 19 [2021-07-09 17:33:28,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:28,215 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 407 transitions. [2021-07-09 17:33:28,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:28,216 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 407 transitions. [2021-07-09 17:33:28,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:28,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:28,216 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:28,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1681,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:28,424 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:28,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:28,424 INFO L82 PathProgramCache]: Analyzing trace with hash 893469062, now seen corresponding path program 323 times [2021-07-09 17:33:28,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:28,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203902618] [2021-07-09 17:33:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:28,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:28,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203902618] [2021-07-09 17:33:28,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203902618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:28,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636490002] [2021-07-09 17:33:28,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:28,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:28,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:28,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:28,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:28,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636490002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:28,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:28,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:28,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151387452] [2021-07-09 17:33:28,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:28,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:28,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:28,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:28,696 INFO L87 Difference]: Start difference. First operand 183 states and 407 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:29,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:29,114 INFO L93 Difference]: Finished difference Result 233 states and 506 transitions. [2021-07-09 17:33:29,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:33:29,114 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:29,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:29,114 INFO L225 Difference]: With dead ends: 233 [2021-07-09 17:33:29,114 INFO L226 Difference]: Without dead ends: 233 [2021-07-09 17:33:29,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 383.0ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:29,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-07-09 17:33:29,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 183. [2021-07-09 17:33:29,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2362637362637363) internal successors, (407), 182 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:29,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 407 transitions. [2021-07-09 17:33:29,116 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 407 transitions. Word has length 19 [2021-07-09 17:33:29,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:29,116 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 407 transitions. [2021-07-09 17:33:29,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:29,117 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 407 transitions. [2021-07-09 17:33:29,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:29,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:29,117 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:29,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1689 [2021-07-09 17:33:29,317 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:29,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:29,318 INFO L82 PathProgramCache]: Analyzing trace with hash -2041381494, now seen corresponding path program 324 times [2021-07-09 17:33:29,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:29,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709549991] [2021-07-09 17:33:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:29,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:29,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709549991] [2021-07-09 17:33:29,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709549991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:29,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737201121] [2021-07-09 17:33:29,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:29,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:33:29,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:29,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:29,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:29,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:29,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:29,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:29,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:29,632 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:33:29,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:33:29,635 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:29,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:29,646 INFO L518 ElimStorePlain]: Eliminatee v_prenex_292 vanished before elimination [2021-07-09 17:33:29,646 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:29,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:29,647 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:33:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:29,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737201121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:29,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:29,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:29,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493724538] [2021-07-09 17:33:29,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:29,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:29,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:29,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:29,674 INFO L87 Difference]: Start difference. First operand 183 states and 407 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:30,052 INFO L93 Difference]: Finished difference Result 193 states and 425 transitions. [2021-07-09 17:33:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:33:30,052 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:30,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:30,053 INFO L225 Difference]: With dead ends: 193 [2021-07-09 17:33:30,053 INFO L226 Difference]: Without dead ends: 193 [2021-07-09 17:33:30,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 405.8ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:33:30,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-07-09 17:33:30,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 174. [2021-07-09 17:33:30,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2427745664739884) internal successors, (388), 173 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:30,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 388 transitions. [2021-07-09 17:33:30,055 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 388 transitions. Word has length 19 [2021-07-09 17:33:30,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:30,055 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 388 transitions. [2021-07-09 17:33:30,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:30,055 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 388 transitions. [2021-07-09 17:33:30,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:30,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:30,055 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:30,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1699,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:30,255 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:30,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:30,256 INFO L82 PathProgramCache]: Analyzing trace with hash 609668230, now seen corresponding path program 325 times [2021-07-09 17:33:30,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:30,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022473623] [2021-07-09 17:33:30,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:30,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:30,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022473623] [2021-07-09 17:33:30,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022473623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:30,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326614329] [2021-07-09 17:33:30,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:30,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:30,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:30,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:30,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:30,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:30,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:30,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:30,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:30,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:30,488 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-07-09 17:33:30,488 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:30,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:30,489 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:33:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:30,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326614329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:30,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:30,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:30,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106805105] [2021-07-09 17:33:30,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:30,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:30,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:30,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:30,504 INFO L87 Difference]: Start difference. First operand 174 states and 388 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:30,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:30,661 INFO L93 Difference]: Finished difference Result 219 states and 477 transitions. [2021-07-09 17:33:30,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:30,661 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:30,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:30,661 INFO L225 Difference]: With dead ends: 219 [2021-07-09 17:33:30,661 INFO L226 Difference]: Without dead ends: 219 [2021-07-09 17:33:30,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:30,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-07-09 17:33:30,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 174. [2021-07-09 17:33:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2427745664739884) internal successors, (388), 173 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 388 transitions. [2021-07-09 17:33:30,663 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 388 transitions. Word has length 19 [2021-07-09 17:33:30,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:30,663 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 388 transitions. [2021-07-09 17:33:30,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:30,663 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 388 transitions. [2021-07-09 17:33:30,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:30,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:30,664 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:30,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1706 [2021-07-09 17:33:30,864 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:30,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:30,864 INFO L82 PathProgramCache]: Analyzing trace with hash 2011797386, now seen corresponding path program 326 times [2021-07-09 17:33:30,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:30,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840882566] [2021-07-09 17:33:30,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:30,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:30,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840882566] [2021-07-09 17:33:30,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840882566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:30,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972055242] [2021-07-09 17:33:30,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:30,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:30,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:30,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:30,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:31,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972055242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:31,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:31,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:31,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991757913] [2021-07-09 17:33:31,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:31,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:31,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:31,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:31,132 INFO L87 Difference]: Start difference. First operand 174 states and 388 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:31,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:31,380 INFO L93 Difference]: Finished difference Result 187 states and 408 transitions. [2021-07-09 17:33:31,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:31,381 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:31,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:31,381 INFO L225 Difference]: With dead ends: 187 [2021-07-09 17:33:31,381 INFO L226 Difference]: Without dead ends: 181 [2021-07-09 17:33:31,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:33:31,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-07-09 17:33:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 174. [2021-07-09 17:33:31,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2369942196531793) internal successors, (387), 173 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:31,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 387 transitions. [2021-07-09 17:33:31,383 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 387 transitions. Word has length 19 [2021-07-09 17:33:31,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:31,383 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 387 transitions. [2021-07-09 17:33:31,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:31,383 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 387 transitions. [2021-07-09 17:33:31,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:31,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:31,383 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:31,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1708,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:31,584 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:31,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:31,584 INFO L82 PathProgramCache]: Analyzing trace with hash -635110826, now seen corresponding path program 327 times [2021-07-09 17:33:31,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:31,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247490459] [2021-07-09 17:33:31,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:31,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:31,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247490459] [2021-07-09 17:33:31,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247490459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:31,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852973845] [2021-07-09 17:33:31,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:31,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:33:31,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:31,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:31,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:31,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852973845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:31,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:31,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:31,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41509897] [2021-07-09 17:33:31,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:31,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:31,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:31,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:31,814 INFO L87 Difference]: Start difference. First operand 174 states and 387 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:32,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:32,161 INFO L93 Difference]: Finished difference Result 230 states and 498 transitions. [2021-07-09 17:33:32,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:33:32,162 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:32,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:32,162 INFO L225 Difference]: With dead ends: 230 [2021-07-09 17:33:32,162 INFO L226 Difference]: Without dead ends: 230 [2021-07-09 17:33:32,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 329.0ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:33:32,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-09 17:33:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 174. [2021-07-09 17:33:32,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2369942196531793) internal successors, (387), 173 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:32,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 387 transitions. [2021-07-09 17:33:32,164 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 387 transitions. Word has length 19 [2021-07-09 17:33:32,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:32,164 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 387 transitions. [2021-07-09 17:33:32,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:32,164 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 387 transitions. [2021-07-09 17:33:32,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:32,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:32,164 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:32,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1713,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:32,365 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:32,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:32,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1421164846, now seen corresponding path program 328 times [2021-07-09 17:33:32,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:32,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564144545] [2021-07-09 17:33:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:32,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:32,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564144545] [2021-07-09 17:33:32,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564144545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:32,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018291568] [2021-07-09 17:33:32,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:32,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:32,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:32,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:32,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:32,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:32,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:32,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:32,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:32,640 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:33:32,640 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:32,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:33:32,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:32,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:32,654 INFO L518 ElimStorePlain]: Eliminatee v_prenex_297 vanished before elimination [2021-07-09 17:33:32,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:32,654 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:33:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:32,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018291568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:32,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:32,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:32,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14700018] [2021-07-09 17:33:32,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:32,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:32,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:32,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:32,682 INFO L87 Difference]: Start difference. First operand 174 states and 387 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:33,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:33,210 INFO L93 Difference]: Finished difference Result 212 states and 452 transitions. [2021-07-09 17:33:33,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:33:33,210 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:33,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:33,210 INFO L225 Difference]: With dead ends: 212 [2021-07-09 17:33:33,210 INFO L226 Difference]: Without dead ends: 209 [2021-07-09 17:33:33,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 515.8ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:33:33,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-07-09 17:33:33,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 178. [2021-07-09 17:33:33,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.231638418079096) internal successors, (395), 177 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 395 transitions. [2021-07-09 17:33:33,212 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 395 transitions. Word has length 19 [2021-07-09 17:33:33,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:33,212 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 395 transitions. [2021-07-09 17:33:33,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:33,212 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 395 transitions. [2021-07-09 17:33:33,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:33,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:33,213 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:33,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1717,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:33,413 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:33,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:33,414 INFO L82 PathProgramCache]: Analyzing trace with hash -995027344, now seen corresponding path program 329 times [2021-07-09 17:33:33,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:33,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749603934] [2021-07-09 17:33:33,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:33,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:33,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749603934] [2021-07-09 17:33:33,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749603934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:33,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961252822] [2021-07-09 17:33:33,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:33,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:33:33,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:33,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:33,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:33,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961252822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:33,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:33,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:33,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369106988] [2021-07-09 17:33:33,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:33,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:33,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:33,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:33,682 INFO L87 Difference]: Start difference. First operand 178 states and 395 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:34,249 INFO L93 Difference]: Finished difference Result 243 states and 525 transitions. [2021-07-09 17:33:34,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:33:34,250 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:34,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:34,250 INFO L225 Difference]: With dead ends: 243 [2021-07-09 17:33:34,250 INFO L226 Difference]: Without dead ends: 243 [2021-07-09 17:33:34,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 503.6ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:33:34,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-07-09 17:33:34,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 178. [2021-07-09 17:33:34,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.231638418079096) internal successors, (395), 177 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:34,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 395 transitions. [2021-07-09 17:33:34,252 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 395 transitions. Word has length 19 [2021-07-09 17:33:34,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:34,252 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 395 transitions. [2021-07-09 17:33:34,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:34,252 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 395 transitions. [2021-07-09 17:33:34,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:34,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:34,253 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:34,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1725,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:34,453 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:34,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:34,453 INFO L82 PathProgramCache]: Analyzing trace with hash -284979574, now seen corresponding path program 330 times [2021-07-09 17:33:34,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:34,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417300988] [2021-07-09 17:33:34,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:34,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:34,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417300988] [2021-07-09 17:33:34,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417300988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:34,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945798376] [2021-07-09 17:33:34,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:34,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:33:34,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:34,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:34,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:34,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:34,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:34,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:34,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:34,746 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.7 percent of original size [2021-07-09 17:33:34,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:33:34,750 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:34,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:34,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:33:34,768 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:34,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:34,785 INFO L518 ElimStorePlain]: Eliminatee v_prenex_301 vanished before elimination [2021-07-09 17:33:34,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:34,786 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-07-09 17:33:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:34,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945798376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:34,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:34,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:34,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442168296] [2021-07-09 17:33:34,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:34,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:34,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:34,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:34,826 INFO L87 Difference]: Start difference. First operand 178 states and 395 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:35,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:35,076 INFO L93 Difference]: Finished difference Result 197 states and 431 transitions. [2021-07-09 17:33:35,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:33:35,076 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:35,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:35,076 INFO L225 Difference]: With dead ends: 197 [2021-07-09 17:33:35,077 INFO L226 Difference]: Without dead ends: 197 [2021-07-09 17:33:35,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 281.8ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:33:35,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-09 17:33:35,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 170. [2021-07-09 17:33:35,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.2366863905325443) internal successors, (378), 169 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:35,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 378 transitions. [2021-07-09 17:33:35,078 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 378 transitions. Word has length 19 [2021-07-09 17:33:35,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:35,078 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 378 transitions. [2021-07-09 17:33:35,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:35,078 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 378 transitions. [2021-07-09 17:33:35,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:35,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:35,079 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:35,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1737 [2021-07-09 17:33:35,279 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:35,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:35,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1084115286, now seen corresponding path program 331 times [2021-07-09 17:33:35,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:35,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953006572] [2021-07-09 17:33:35,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:35,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:35,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953006572] [2021-07-09 17:33:35,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953006572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:35,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837598139] [2021-07-09 17:33:35,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:35,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:35,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:35,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837598139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:35,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:35,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:35,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10129086] [2021-07-09 17:33:35,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:35,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:35,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:35,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:35,493 INFO L87 Difference]: Start difference. First operand 170 states and 378 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:35,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:35,643 INFO L93 Difference]: Finished difference Result 208 states and 453 transitions. [2021-07-09 17:33:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:33:35,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:35,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:35,643 INFO L225 Difference]: With dead ends: 208 [2021-07-09 17:33:35,643 INFO L226 Difference]: Without dead ends: 208 [2021-07-09 17:33:35,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 178.8ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:33:35,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-09 17:33:35,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 171. [2021-07-09 17:33:35,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.235294117647059) internal successors, (380), 170 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:35,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 380 transitions. [2021-07-09 17:33:35,647 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 380 transitions. Word has length 19 [2021-07-09 17:33:35,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:35,647 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 380 transitions. [2021-07-09 17:33:35,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:35,648 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 380 transitions. [2021-07-09 17:33:35,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:35,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:35,648 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:35,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1743 [2021-07-09 17:33:35,848 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:35,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:35,849 INFO L82 PathProgramCache]: Analyzing trace with hash 724198768, now seen corresponding path program 332 times [2021-07-09 17:33:35,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:35,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120062292] [2021-07-09 17:33:35,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:35,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:35,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120062292] [2021-07-09 17:33:35,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120062292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:35,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331986431] [2021-07-09 17:33:35,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:35,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:35,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:35,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:35,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:36,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:36,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:36,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:36,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:36,119 INFO L628 ElimStorePlain]: treesize reduction 78, result has 35.5 percent of original size [2021-07-09 17:33:36,119 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:36,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:33:36,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:36,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:36,136 INFO L518 ElimStorePlain]: Eliminatee v_prenex_303 vanished before elimination [2021-07-09 17:33:36,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:36,137 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:33:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:36,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331986431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:36,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:36,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:36,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635567077] [2021-07-09 17:33:36,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:36,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:36,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:36,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:36,177 INFO L87 Difference]: Start difference. First operand 171 states and 380 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:36,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:36,404 INFO L93 Difference]: Finished difference Result 226 states and 489 transitions. [2021-07-09 17:33:36,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:33:36,404 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:36,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:36,404 INFO L225 Difference]: With dead ends: 226 [2021-07-09 17:33:36,405 INFO L226 Difference]: Without dead ends: 226 [2021-07-09 17:33:36,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 231.6ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:33:36,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-07-09 17:33:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 172. [2021-07-09 17:33:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2339181286549707) internal successors, (382), 171 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:36,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 382 transitions. [2021-07-09 17:33:36,406 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 382 transitions. Word has length 19 [2021-07-09 17:33:36,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:36,407 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 382 transitions. [2021-07-09 17:33:36,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:36,407 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 382 transitions. [2021-07-09 17:33:36,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:36,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:36,407 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:36,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1747 [2021-07-09 17:33:36,607 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:36,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:36,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1434246538, now seen corresponding path program 333 times [2021-07-09 17:33:36,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:36,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480521224] [2021-07-09 17:33:36,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:36,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:36,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480521224] [2021-07-09 17:33:36,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480521224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:36,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062924633] [2021-07-09 17:33:36,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:36,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:33:36,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:36,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:36,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:36,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:36,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:36,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:36,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:36,862 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.7 percent of original size [2021-07-09 17:33:36,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:33:36,865 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:36,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:36,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:33:36,883 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:36,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:36,897 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:36,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:36,897 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-07-09 17:33:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:36,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062924633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:36,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:36,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:36,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815960098] [2021-07-09 17:33:36,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:36,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:36,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:36,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:36,936 INFO L87 Difference]: Start difference. First operand 172 states and 382 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:37,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:37,188 INFO L93 Difference]: Finished difference Result 197 states and 431 transitions. [2021-07-09 17:33:37,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:33:37,188 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:37,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:37,188 INFO L225 Difference]: With dead ends: 197 [2021-07-09 17:33:37,189 INFO L226 Difference]: Without dead ends: 197 [2021-07-09 17:33:37,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 254.5ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:33:37,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-09 17:33:37,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 170. [2021-07-09 17:33:37,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.2366863905325443) internal successors, (378), 169 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:37,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 378 transitions. [2021-07-09 17:33:37,190 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 378 transitions. Word has length 19 [2021-07-09 17:33:37,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:37,191 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 378 transitions. [2021-07-09 17:33:37,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:37,191 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 378 transitions. [2021-07-09 17:33:37,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:37,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:37,191 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:37,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1751,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:37,405 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:37,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:37,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1808722854, now seen corresponding path program 334 times [2021-07-09 17:33:37,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:37,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747622099] [2021-07-09 17:33:37,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:37,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:37,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747622099] [2021-07-09 17:33:37,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747622099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:37,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374166944] [2021-07-09 17:33:37,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:37,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:37,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:37,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:37,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:37,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:37,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:37,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:37,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:37,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:37,614 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:37,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:37,616 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:37,647 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:33:37,647 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:37,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:37,648 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:33:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:37,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374166944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:37,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:37,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:37,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784666651] [2021-07-09 17:33:37,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:37,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:37,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:37,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:37,674 INFO L87 Difference]: Start difference. First operand 170 states and 378 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:38,081 INFO L93 Difference]: Finished difference Result 231 states and 487 transitions. [2021-07-09 17:33:38,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:33:38,081 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:38,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:38,081 INFO L225 Difference]: With dead ends: 231 [2021-07-09 17:33:38,081 INFO L226 Difference]: Without dead ends: 228 [2021-07-09 17:33:38,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 396.7ms TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:33:38,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-09 17:33:38,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 175. [2021-07-09 17:33:38,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.235632183908046) internal successors, (389), 174 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 389 transitions. [2021-07-09 17:33:38,083 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 389 transitions. Word has length 19 [2021-07-09 17:33:38,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:38,083 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 389 transitions. [2021-07-09 17:33:38,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 389 transitions. [2021-07-09 17:33:38,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:38,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:38,084 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:38,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1755 [2021-07-09 17:33:38,284 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:38,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:38,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1382585352, now seen corresponding path program 335 times [2021-07-09 17:33:38,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:38,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646093128] [2021-07-09 17:33:38,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:38,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:38,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646093128] [2021-07-09 17:33:38,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646093128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:38,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460068249] [2021-07-09 17:33:38,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:38,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:38,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:38,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:38,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:38,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460068249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:38,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:38,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:38,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583196277] [2021-07-09 17:33:38,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:38,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:38,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:38,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:38,510 INFO L87 Difference]: Start difference. First operand 175 states and 389 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:38,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:38,806 INFO L93 Difference]: Finished difference Result 209 states and 448 transitions. [2021-07-09 17:33:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:33:38,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:38,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:38,807 INFO L225 Difference]: With dead ends: 209 [2021-07-09 17:33:38,807 INFO L226 Difference]: Without dead ends: 209 [2021-07-09 17:33:38,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 292.6ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:33:38,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-07-09 17:33:38,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 175. [2021-07-09 17:33:38,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.235632183908046) internal successors, (389), 174 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:38,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 389 transitions. [2021-07-09 17:33:38,809 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 389 transitions. Word has length 19 [2021-07-09 17:33:38,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:38,809 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 389 transitions. [2021-07-09 17:33:38,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:38,809 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 389 transitions. [2021-07-09 17:33:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:38,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:38,809 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:39,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1766,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:39,010 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:39,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:39,010 INFO L82 PathProgramCache]: Analyzing trace with hash -672537582, now seen corresponding path program 336 times [2021-07-09 17:33:39,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:39,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707508511] [2021-07-09 17:33:39,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:39,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:39,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707508511] [2021-07-09 17:33:39,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707508511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:39,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999571285] [2021-07-09 17:33:39,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:39,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:33:39,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:39,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:39,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:39,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:39,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:39,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:39,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:39,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:39,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:39,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:39,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:39,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:39,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:39,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:39,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:39,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:39,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:39,232 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:39,274 INFO L628 ElimStorePlain]: treesize reduction 69, result has 38.9 percent of original size [2021-07-09 17:33:39,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:39,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:33:39,279 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:39,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:39,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:39,297 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-07-09 17:33:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:39,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999571285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:39,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:39,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:39,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885250270] [2021-07-09 17:33:39,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:39,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:39,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:39,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:39,339 INFO L87 Difference]: Start difference. First operand 175 states and 389 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:39,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:39,758 INFO L93 Difference]: Finished difference Result 242 states and 511 transitions. [2021-07-09 17:33:39,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:33:39,758 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:39,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:39,759 INFO L225 Difference]: With dead ends: 242 [2021-07-09 17:33:39,759 INFO L226 Difference]: Without dead ends: 242 [2021-07-09 17:33:39,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 408.4ms TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:33:39,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-07-09 17:33:39,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 174. [2021-07-09 17:33:39,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2369942196531793) internal successors, (387), 173 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:39,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 387 transitions. [2021-07-09 17:33:39,761 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 387 transitions. Word has length 19 [2021-07-09 17:33:39,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:39,761 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 387 transitions. [2021-07-09 17:33:39,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:39,761 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 387 transitions. [2021-07-09 17:33:39,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:39,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:39,761 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:39,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1778 [2021-07-09 17:33:39,962 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:39,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:39,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1389377720, now seen corresponding path program 337 times [2021-07-09 17:33:39,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:39,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547674082] [2021-07-09 17:33:39,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:40,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:40,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547674082] [2021-07-09 17:33:40,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547674082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:40,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969591235] [2021-07-09 17:33:40,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:40,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:40,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:40,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969591235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:40,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:40,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:40,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184708658] [2021-07-09 17:33:40,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:40,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:40,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:40,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:40,185 INFO L87 Difference]: Start difference. First operand 174 states and 387 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:40,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:40,447 INFO L93 Difference]: Finished difference Result 183 states and 400 transitions. [2021-07-09 17:33:40,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:33:40,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:40,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:40,448 INFO L225 Difference]: With dead ends: 183 [2021-07-09 17:33:40,448 INFO L226 Difference]: Without dead ends: 179 [2021-07-09 17:33:40,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 306.2ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:33:40,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-07-09 17:33:40,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 174. [2021-07-09 17:33:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.23121387283237) internal successors, (386), 173 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 386 transitions. [2021-07-09 17:33:40,450 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 386 transitions. Word has length 19 [2021-07-09 17:33:40,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:40,450 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 386 transitions. [2021-07-09 17:33:40,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:40,450 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 386 transitions. [2021-07-09 17:33:40,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:40,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:40,450 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:40,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1781 [2021-07-09 17:33:40,651 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:40,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:40,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1476258954, now seen corresponding path program 338 times [2021-07-09 17:33:40,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:40,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853934128] [2021-07-09 17:33:40,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:40,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:40,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853934128] [2021-07-09 17:33:40,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853934128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:40,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009584657] [2021-07-09 17:33:40,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:40,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:40,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:40,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:40,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:40,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:40,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:40,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:40,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:40,865 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-07-09 17:33:40,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:33:40,867 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:40,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:40,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:40,873 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-07-09 17:33:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:40,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009584657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:40,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:40,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:40,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384144981] [2021-07-09 17:33:40,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:40,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:40,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:40,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:40,890 INFO L87 Difference]: Start difference. First operand 174 states and 386 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:41,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:41,118 INFO L93 Difference]: Finished difference Result 204 states and 443 transitions. [2021-07-09 17:33:41,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:33:41,118 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:41,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:41,119 INFO L225 Difference]: With dead ends: 204 [2021-07-09 17:33:41,119 INFO L226 Difference]: Without dead ends: 204 [2021-07-09 17:33:41,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:33:41,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-07-09 17:33:41,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 167. [2021-07-09 17:33:41,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.2289156626506026) internal successors, (370), 166 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:41,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 370 transitions. [2021-07-09 17:33:41,120 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 370 transitions. Word has length 19 [2021-07-09 17:33:41,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:41,121 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 370 transitions. [2021-07-09 17:33:41,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:41,121 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 370 transitions. [2021-07-09 17:33:41,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:41,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:41,121 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:41,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1785 [2021-07-09 17:33:41,321 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:41,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:41,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1376514694, now seen corresponding path program 339 times [2021-07-09 17:33:41,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:41,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394448012] [2021-07-09 17:33:41,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:41,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:41,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394448012] [2021-07-09 17:33:41,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394448012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:41,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385374072] [2021-07-09 17:33:41,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:41,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:33:41,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:41,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:41,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:41,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385374072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:41,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:41,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:41,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506676214] [2021-07-09 17:33:41,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:41,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:41,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:41,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:41,597 INFO L87 Difference]: Start difference. First operand 167 states and 370 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:41,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:41,998 INFO L93 Difference]: Finished difference Result 208 states and 443 transitions. [2021-07-09 17:33:41,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:33:41,999 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:41,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:41,999 INFO L225 Difference]: With dead ends: 208 [2021-07-09 17:33:41,999 INFO L226 Difference]: Without dead ends: 208 [2021-07-09 17:33:41,999 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 403.2ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:33:41,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-09 17:33:42,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 170. [2021-07-09 17:33:42,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.2366863905325443) internal successors, (378), 169 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:42,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 378 transitions. [2021-07-09 17:33:42,001 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 378 transitions. Word has length 19 [2021-07-09 17:33:42,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:42,001 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 378 transitions. [2021-07-09 17:33:42,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:42,001 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 378 transitions. [2021-07-09 17:33:42,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:42,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:42,001 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:42,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1786 [2021-07-09 17:33:42,202 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:42,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:42,202 INFO L82 PathProgramCache]: Analyzing trace with hash -908266892, now seen corresponding path program 340 times [2021-07-09 17:33:42,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:42,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790865250] [2021-07-09 17:33:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:42,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:42,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790865250] [2021-07-09 17:33:42,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790865250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:42,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054829580] [2021-07-09 17:33:42,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:42,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:42,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:42,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:42,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:42,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:42,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:42,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:42,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:42,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:42,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:42,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:42,438 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:42,469 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:33:42,469 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:42,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:42,470 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:33:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:42,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054829580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:42,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:42,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:42,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107533020] [2021-07-09 17:33:42,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:42,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:42,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:42,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:42,504 INFO L87 Difference]: Start difference. First operand 170 states and 378 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:43,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:43,044 INFO L93 Difference]: Finished difference Result 262 states and 551 transitions. [2021-07-09 17:33:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:33:43,044 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:43,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:43,044 INFO L225 Difference]: With dead ends: 262 [2021-07-09 17:33:43,044 INFO L226 Difference]: Without dead ends: 262 [2021-07-09 17:33:43,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 509.4ms TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:33:43,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-09 17:33:43,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 172. [2021-07-09 17:33:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.257309941520468) internal successors, (386), 171 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 386 transitions. [2021-07-09 17:33:43,046 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 386 transitions. Word has length 19 [2021-07-09 17:33:43,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:43,046 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 386 transitions. [2021-07-09 17:33:43,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:43,047 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 386 transitions. [2021-07-09 17:33:43,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:43,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:43,047 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:43,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1796 [2021-07-09 17:33:43,247 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:43,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:43,248 INFO L82 PathProgramCache]: Analyzing trace with hash 503579440, now seen corresponding path program 341 times [2021-07-09 17:33:43,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:43,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784891385] [2021-07-09 17:33:43,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:43,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:43,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784891385] [2021-07-09 17:33:43,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784891385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:43,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606015287] [2021-07-09 17:33:43,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:43,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:43,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:43,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:43,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:43,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606015287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:43,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:43,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:43,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763743153] [2021-07-09 17:33:43,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:43,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:43,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:43,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:43,472 INFO L87 Difference]: Start difference. First operand 172 states and 386 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:43,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:43,843 INFO L93 Difference]: Finished difference Result 185 states and 405 transitions. [2021-07-09 17:33:43,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:43,843 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:43,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:43,843 INFO L225 Difference]: With dead ends: 185 [2021-07-09 17:33:43,844 INFO L226 Difference]: Without dead ends: 181 [2021-07-09 17:33:43,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 391.6ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:43,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-07-09 17:33:43,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 172. [2021-07-09 17:33:43,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2514619883040936) internal successors, (385), 171 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:43,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 385 transitions. [2021-07-09 17:33:43,845 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 385 transitions. Word has length 19 [2021-07-09 17:33:43,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:43,845 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 385 transitions. [2021-07-09 17:33:43,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:43,845 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 385 transitions. [2021-07-09 17:33:43,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:43,846 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:43,846 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:44,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1806,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:44,046 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:44,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:44,046 INFO L82 PathProgramCache]: Analyzing trace with hash 590460674, now seen corresponding path program 342 times [2021-07-09 17:33:44,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:44,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476010563] [2021-07-09 17:33:44,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:44,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:44,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476010563] [2021-07-09 17:33:44,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476010563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:44,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639751664] [2021-07-09 17:33:44,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:44,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:33:44,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:44,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:44,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:44,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:44,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:44,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,268 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:33:44,268 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:44,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,268 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:33:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:44,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639751664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:44,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:44,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:44,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883179738] [2021-07-09 17:33:44,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:44,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:44,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:44,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:44,274 INFO L87 Difference]: Start difference. First operand 172 states and 385 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:44,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:44,655 INFO L93 Difference]: Finished difference Result 217 states and 469 transitions. [2021-07-09 17:33:44,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:33:44,655 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:44,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:44,656 INFO L225 Difference]: With dead ends: 217 [2021-07-09 17:33:44,656 INFO L226 Difference]: Without dead ends: 217 [2021-07-09 17:33:44,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 374.6ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:33:44,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-07-09 17:33:44,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 171. [2021-07-09 17:33:44,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.2529411764705882) internal successors, (383), 170 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:44,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 383 transitions. [2021-07-09 17:33:44,658 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 383 transitions. Word has length 19 [2021-07-09 17:33:44,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:44,658 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 383 transitions. [2021-07-09 17:33:44,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:44,658 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 383 transitions. [2021-07-09 17:33:44,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:44,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:44,658 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:44,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1810 [2021-07-09 17:33:44,859 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:44,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:44,859 INFO L82 PathProgramCache]: Analyzing trace with hash -2766826, now seen corresponding path program 343 times [2021-07-09 17:33:44,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:44,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110835493] [2021-07-09 17:33:44,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:44,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:44,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110835493] [2021-07-09 17:33:44,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110835493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:44,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427256164] [2021-07-09 17:33:44,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:44,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:44,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:45,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427256164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:45,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:45,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:45,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041475666] [2021-07-09 17:33:45,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:45,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:45,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:45,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:45,081 INFO L87 Difference]: Start difference. First operand 171 states and 383 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:45,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:45,327 INFO L93 Difference]: Finished difference Result 182 states and 399 transitions. [2021-07-09 17:33:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:33:45,327 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:45,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:45,327 INFO L225 Difference]: With dead ends: 182 [2021-07-09 17:33:45,327 INFO L226 Difference]: Without dead ends: 176 [2021-07-09 17:33:45,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 267.0ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:33:45,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-07-09 17:33:45,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 171. [2021-07-09 17:33:45,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.2470588235294118) internal successors, (382), 170 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:45,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 382 transitions. [2021-07-09 17:33:45,329 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 382 transitions. Word has length 19 [2021-07-09 17:33:45,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:45,329 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 382 transitions. [2021-07-09 17:33:45,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:45,329 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 382 transitions. [2021-07-09 17:33:45,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:45,330 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:45,330 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:45,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1814,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:45,530 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:45,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:45,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1516323446, now seen corresponding path program 344 times [2021-07-09 17:33:45,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:45,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949004035] [2021-07-09 17:33:45,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:45,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:45,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949004035] [2021-07-09 17:33:45,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949004035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:45,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929968414] [2021-07-09 17:33:45,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:45,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:45,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:45,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:45,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:45,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:45,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:45,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:45,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:45,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:45,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:45,727 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:45,743 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-07-09 17:33:45,744 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:45,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:45,744 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-07-09 17:33:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:45,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929968414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:45,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:45,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:45,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081613225] [2021-07-09 17:33:45,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:45,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:45,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:45,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:45,762 INFO L87 Difference]: Start difference. First operand 171 states and 382 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:46,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:46,001 INFO L93 Difference]: Finished difference Result 202 states and 438 transitions. [2021-07-09 17:33:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:33:46,001 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:46,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:46,001 INFO L225 Difference]: With dead ends: 202 [2021-07-09 17:33:46,001 INFO L226 Difference]: Without dead ends: 202 [2021-07-09 17:33:46,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:33:46,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-09 17:33:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 168. [2021-07-09 17:33:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2275449101796405) internal successors, (372), 167 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 372 transitions. [2021-07-09 17:33:46,003 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 372 transitions. Word has length 19 [2021-07-09 17:33:46,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:46,003 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 372 transitions. [2021-07-09 17:33:46,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:46,003 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 372 transitions. [2021-07-09 17:33:46,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:46,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:46,004 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:46,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1818,345 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:46,204 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:46,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:46,204 INFO L82 PathProgramCache]: Analyzing trace with hash -954493294, now seen corresponding path program 345 times [2021-07-09 17:33:46,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:46,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428696906] [2021-07-09 17:33:46,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:46,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:46,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428696906] [2021-07-09 17:33:46,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428696906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:46,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979094622] [2021-07-09 17:33:46,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:46,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:33:46,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:46,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:46,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:46,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979094622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:46,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:46,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:46,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366620569] [2021-07-09 17:33:46,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:46,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:46,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:46,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:46,469 INFO L87 Difference]: Start difference. First operand 168 states and 372 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:46,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:46,585 INFO L93 Difference]: Finished difference Result 187 states and 410 transitions. [2021-07-09 17:33:46,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:46,586 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:46,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:46,586 INFO L225 Difference]: With dead ends: 187 [2021-07-09 17:33:46,586 INFO L226 Difference]: Without dead ends: 187 [2021-07-09 17:33:46,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:46,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-07-09 17:33:46,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 168. [2021-07-09 17:33:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2275449101796405) internal successors, (372), 167 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:46,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 372 transitions. [2021-07-09 17:33:46,588 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 372 transitions. Word has length 19 [2021-07-09 17:33:46,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:46,588 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 372 transitions. [2021-07-09 17:33:46,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:46,588 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 372 transitions. [2021-07-09 17:33:46,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:46,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:46,588 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:46,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1819 [2021-07-09 17:33:46,789 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:46,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:46,789 INFO L82 PathProgramCache]: Analyzing trace with hash -887938366, now seen corresponding path program 346 times [2021-07-09 17:33:46,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:46,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644511143] [2021-07-09 17:33:46,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:46,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:46,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644511143] [2021-07-09 17:33:46,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644511143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:46,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742599948] [2021-07-09 17:33:46,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:46,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:46,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:46,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:46,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:47,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:47,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:47,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:47,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:47,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:47,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:47,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:47,060 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-07-09 17:33:47,060 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:47,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:47,060 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:33:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:47,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742599948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:47,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:47,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:47,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596575801] [2021-07-09 17:33:47,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:47,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:47,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:47,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:47,077 INFO L87 Difference]: Start difference. First operand 168 states and 372 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:47,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:47,407 INFO L93 Difference]: Finished difference Result 207 states and 450 transitions. [2021-07-09 17:33:47,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:47,407 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:47,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:47,408 INFO L225 Difference]: With dead ends: 207 [2021-07-09 17:33:47,408 INFO L226 Difference]: Without dead ends: 207 [2021-07-09 17:33:47,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 374.3ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:33:47,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-09 17:33:47,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 168. [2021-07-09 17:33:47,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2275449101796405) internal successors, (372), 167 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:47,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 372 transitions. [2021-07-09 17:33:47,410 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 372 transitions. Word has length 19 [2021-07-09 17:33:47,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:47,410 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 372 transitions. [2021-07-09 17:33:47,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:47,410 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 372 transitions. [2021-07-09 17:33:47,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:47,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:47,410 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:47,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1823 [2021-07-09 17:33:47,611 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:47,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:47,611 INFO L82 PathProgramCache]: Analyzing trace with hash -2132717422, now seen corresponding path program 347 times [2021-07-09 17:33:47,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:47,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784413518] [2021-07-09 17:33:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:47,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:47,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784413518] [2021-07-09 17:33:47,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784413518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:47,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77633232] [2021-07-09 17:33:47,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:47,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:47,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:47,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:47,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:47,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77633232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:47,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:47,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:47,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697346147] [2021-07-09 17:33:47,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:47,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:47,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:47,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:47,890 INFO L87 Difference]: Start difference. First operand 168 states and 372 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:48,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:48,320 INFO L93 Difference]: Finished difference Result 219 states and 473 transitions. [2021-07-09 17:33:48,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:33:48,320 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:48,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:48,321 INFO L225 Difference]: With dead ends: 219 [2021-07-09 17:33:48,321 INFO L226 Difference]: Without dead ends: 219 [2021-07-09 17:33:48,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 447.6ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:33:48,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-07-09 17:33:48,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 168. [2021-07-09 17:33:48,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2275449101796405) internal successors, (372), 167 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:48,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 372 transitions. [2021-07-09 17:33:48,323 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 372 transitions. Word has length 19 [2021-07-09 17:33:48,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:48,323 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 372 transitions. [2021-07-09 17:33:48,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:48,323 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 372 transitions. [2021-07-09 17:33:48,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:48,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:48,323 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:48,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1825,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:48,524 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:48,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:48,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1152264386, now seen corresponding path program 348 times [2021-07-09 17:33:48,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:48,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781872782] [2021-07-09 17:33:48,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:48,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:48,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781872782] [2021-07-09 17:33:48,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781872782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:48,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440674550] [2021-07-09 17:33:48,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:48,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:33:48,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:48,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:48,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:48,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:48,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:48,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:48,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:48,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:48,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:48,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:48,837 INFO L628 ElimStorePlain]: treesize reduction 72, result has 41.5 percent of original size [2021-07-09 17:33:48,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:48,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:48,841 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:48,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:48,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:33:48,859 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:48,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:48,872 INFO L518 ElimStorePlain]: Eliminatee v_prenex_312 vanished before elimination [2021-07-09 17:33:48,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:48,874 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:33:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:48,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440674550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:48,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:48,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:48,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649129158] [2021-07-09 17:33:48,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:48,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:48,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:48,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:48,916 INFO L87 Difference]: Start difference. First operand 168 states and 372 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:49,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:49,439 INFO L93 Difference]: Finished difference Result 224 states and 483 transitions. [2021-07-09 17:33:49,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:33:49,439 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:49,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:49,439 INFO L225 Difference]: With dead ends: 224 [2021-07-09 17:33:49,439 INFO L226 Difference]: Without dead ends: 224 [2021-07-09 17:33:49,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 533.8ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:33:49,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-09 17:33:49,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 168. [2021-07-09 17:33:49,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2275449101796405) internal successors, (372), 167 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:49,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 372 transitions. [2021-07-09 17:33:49,441 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 372 transitions. Word has length 19 [2021-07-09 17:33:49,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:49,441 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 372 transitions. [2021-07-09 17:33:49,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:49,441 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 372 transitions. [2021-07-09 17:33:49,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:49,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:49,442 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:49,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1829,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:49,642 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:49,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:49,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1132517200, now seen corresponding path program 349 times [2021-07-09 17:33:49,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:49,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871285205] [2021-07-09 17:33:49,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:49,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:49,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871285205] [2021-07-09 17:33:49,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871285205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:49,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413440505] [2021-07-09 17:33:49,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:49,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:49,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:49,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:49,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:49,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:49,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:49,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:49,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,992 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:33:49,992 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:49,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:33:49,994 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:50,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:50,006 INFO L518 ElimStorePlain]: Eliminatee v_prenex_315 vanished before elimination [2021-07-09 17:33:50,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:50,007 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:33:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:50,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413440505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:50,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:50,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:50,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977369887] [2021-07-09 17:33:50,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:50,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:50,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:50,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:50,035 INFO L87 Difference]: Start difference. First operand 168 states and 372 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:50,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:50,403 INFO L93 Difference]: Finished difference Result 186 states and 406 transitions. [2021-07-09 17:33:50,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:33:50,403 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:50,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:50,404 INFO L225 Difference]: With dead ends: 186 [2021-07-09 17:33:50,404 INFO L226 Difference]: Without dead ends: 186 [2021-07-09 17:33:50,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 452.6ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:33:50,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-07-09 17:33:50,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2021-07-09 17:33:50,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2) internal successors, (352), 160 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:50,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 352 transitions. [2021-07-09 17:33:50,406 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 352 transitions. Word has length 19 [2021-07-09 17:33:50,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:50,406 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 352 transitions. [2021-07-09 17:33:50,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:50,406 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 352 transitions. [2021-07-09 17:33:50,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:50,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:50,406 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:50,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1833 [2021-07-09 17:33:50,607 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:50,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:50,607 INFO L82 PathProgramCache]: Analyzing trace with hash -2128105322, now seen corresponding path program 350 times [2021-07-09 17:33:50,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:50,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832176019] [2021-07-09 17:33:50,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:50,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:50,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:50,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832176019] [2021-07-09 17:33:50,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832176019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:50,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890268361] [2021-07-09 17:33:50,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:50,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:50,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:50,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:50,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:50,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890268361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:50,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:50,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:50,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8174581] [2021-07-09 17:33:50,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:50,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:50,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:50,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:50,889 INFO L87 Difference]: Start difference. First operand 161 states and 352 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:51,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:51,051 INFO L93 Difference]: Finished difference Result 174 states and 373 transitions. [2021-07-09 17:33:51,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:51,052 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:51,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:51,052 INFO L225 Difference]: With dead ends: 174 [2021-07-09 17:33:51,052 INFO L226 Difference]: Without dead ends: 165 [2021-07-09 17:33:51,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:33:51,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-07-09 17:33:51,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2021-07-09 17:33:51,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2) internal successors, (352), 160 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:51,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 352 transitions. [2021-07-09 17:33:51,054 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 352 transitions. Word has length 19 [2021-07-09 17:33:51,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:51,054 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 352 transitions. [2021-07-09 17:33:51,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:51,054 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 352 transitions. [2021-07-09 17:33:51,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:51,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:51,054 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:51,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1840 [2021-07-09 17:33:51,255 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:51,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:51,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1717086026, now seen corresponding path program 351 times [2021-07-09 17:33:51,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:51,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6254387] [2021-07-09 17:33:51,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:51,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:51,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6254387] [2021-07-09 17:33:51,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6254387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:51,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152744714] [2021-07-09 17:33:51,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:51,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:33:51,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:51,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:51,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:51,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:51,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:51,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:51,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:51,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:51,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:51,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:51,511 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-07-09 17:33:51,511 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:51,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:51,512 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:33:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:51,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152744714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:51,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:51,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:51,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716909416] [2021-07-09 17:33:51,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:51,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:51,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:51,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:51,528 INFO L87 Difference]: Start difference. First operand 161 states and 352 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:51,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:51,690 INFO L93 Difference]: Finished difference Result 192 states and 414 transitions. [2021-07-09 17:33:51,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:33:51,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:51,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:51,691 INFO L225 Difference]: With dead ends: 192 [2021-07-09 17:33:51,691 INFO L226 Difference]: Without dead ends: 192 [2021-07-09 17:33:51,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 192.9ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:33:51,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-07-09 17:33:51,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 162. [2021-07-09 17:33:51,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.198757763975155) internal successors, (354), 161 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:51,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 354 transitions. [2021-07-09 17:33:51,693 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 354 transitions. Word has length 19 [2021-07-09 17:33:51,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:51,693 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 354 transitions. [2021-07-09 17:33:51,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:51,693 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 354 transitions. [2021-07-09 17:33:51,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:51,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:51,693 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:51,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1845,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:51,893 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:51,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:51,894 INFO L82 PathProgramCache]: Analyzing trace with hash 472306970, now seen corresponding path program 352 times [2021-07-09 17:33:51,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:51,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998037013] [2021-07-09 17:33:51,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:51,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:51,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998037013] [2021-07-09 17:33:51,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998037013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:51,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581639015] [2021-07-09 17:33:51,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:51,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:51,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:51,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:51,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:52,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:52,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:52,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:52,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:52,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:52,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:52,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:52,159 INFO L628 ElimStorePlain]: treesize reduction 38, result has 28.3 percent of original size [2021-07-09 17:33:52,159 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:52,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:52,160 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:33:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:52,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581639015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:52,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:52,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:52,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071108762] [2021-07-09 17:33:52,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:52,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:52,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:52,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:52,176 INFO L87 Difference]: Start difference. First operand 162 states and 354 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:52,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:52,558 INFO L93 Difference]: Finished difference Result 208 states and 446 transitions. [2021-07-09 17:33:52,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:52,559 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:52,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:52,559 INFO L225 Difference]: With dead ends: 208 [2021-07-09 17:33:52,559 INFO L226 Difference]: Without dead ends: 208 [2021-07-09 17:33:52,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 412.5ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:33:52,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-09 17:33:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 163. [2021-07-09 17:33:52,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.197530864197531) internal successors, (356), 162 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 356 transitions. [2021-07-09 17:33:52,561 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 356 transitions. Word has length 19 [2021-07-09 17:33:52,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:52,562 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 356 transitions. [2021-07-09 17:33:52,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 356 transitions. [2021-07-09 17:33:52,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:52,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:52,562 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:52,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1847,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:52,762 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:52,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:52,763 INFO L82 PathProgramCache]: Analyzing trace with hash 112390452, now seen corresponding path program 353 times [2021-07-09 17:33:52,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:52,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235381697] [2021-07-09 17:33:52,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:52,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:52,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235381697] [2021-07-09 17:33:52,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235381697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:52,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914171717] [2021-07-09 17:33:52,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:52,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:52,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:52,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:52,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:53,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914171717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:53,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:53,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:53,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055129055] [2021-07-09 17:33:53,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:53,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:53,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:53,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:53,034 INFO L87 Difference]: Start difference. First operand 163 states and 356 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:53,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:53,433 INFO L93 Difference]: Finished difference Result 224 states and 479 transitions. [2021-07-09 17:33:53,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:33:53,433 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:53,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:53,433 INFO L225 Difference]: With dead ends: 224 [2021-07-09 17:33:53,433 INFO L226 Difference]: Without dead ends: 224 [2021-07-09 17:33:53,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 433.8ms TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:33:53,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-09 17:33:53,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 164. [2021-07-09 17:33:53,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.196319018404908) internal successors, (358), 163 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:53,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 358 transitions. [2021-07-09 17:33:53,435 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 358 transitions. Word has length 19 [2021-07-09 17:33:53,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:53,435 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 358 transitions. [2021-07-09 17:33:53,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:53,435 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 358 transitions. [2021-07-09 17:33:53,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:53,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:53,436 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:53,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1849,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:53,636 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:53,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:53,636 INFO L82 PathProgramCache]: Analyzing trace with hash 822438222, now seen corresponding path program 354 times [2021-07-09 17:33:53,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:53,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533179198] [2021-07-09 17:33:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:53,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:53,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533179198] [2021-07-09 17:33:53,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533179198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:53,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152980968] [2021-07-09 17:33:53,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:53,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:33:53,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:53,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:53,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:53,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:53,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:53,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:53,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:53,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:53,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:53,904 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:53,948 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.7 percent of original size [2021-07-09 17:33:53,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:53,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:33:53,951 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:53,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:53,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:33:53,969 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:53,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:53,985 INFO L518 ElimStorePlain]: Eliminatee v_prenex_320 vanished before elimination [2021-07-09 17:33:53,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:53,987 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-07-09 17:33:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:54,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152980968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:54,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:54,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:54,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703012212] [2021-07-09 17:33:54,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:54,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:54,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:54,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:54,030 INFO L87 Difference]: Start difference. First operand 164 states and 358 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:54,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:54,237 INFO L93 Difference]: Finished difference Result 181 states and 392 transitions. [2021-07-09 17:33:54,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:33:54,238 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:54,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:54,238 INFO L225 Difference]: With dead ends: 181 [2021-07-09 17:33:54,238 INFO L226 Difference]: Without dead ends: 181 [2021-07-09 17:33:54,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 298.9ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:33:54,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-07-09 17:33:54,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 158. [2021-07-09 17:33:54,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.2038216560509554) internal successors, (346), 157 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:54,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 346 transitions. [2021-07-09 17:33:54,240 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 346 transitions. Word has length 19 [2021-07-09 17:33:54,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:54,240 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 346 transitions. [2021-07-09 17:33:54,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:54,240 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 346 transitions. [2021-07-09 17:33:54,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:54,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:54,240 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:54,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1859,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:54,441 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:54,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:54,441 INFO L82 PathProgramCache]: Analyzing trace with hash 330970698, now seen corresponding path program 355 times [2021-07-09 17:33:54,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:54,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300860714] [2021-07-09 17:33:54,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:54,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:54,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300860714] [2021-07-09 17:33:54,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300860714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:54,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702795039] [2021-07-09 17:33:54,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:54,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:54,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:54,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:54,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:54,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:54,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:54,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:54,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:54,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:54,685 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-07-09 17:33:54,685 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:54,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:54,686 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:33:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:54,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702795039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:54,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:54,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:54,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929582032] [2021-07-09 17:33:54,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:54,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:54,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:54,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:54,702 INFO L87 Difference]: Start difference. First operand 158 states and 346 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:54,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:54,889 INFO L93 Difference]: Finished difference Result 190 states and 410 transitions. [2021-07-09 17:33:54,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:54,889 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:54,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:54,890 INFO L225 Difference]: With dead ends: 190 [2021-07-09 17:33:54,890 INFO L226 Difference]: Without dead ends: 190 [2021-07-09 17:33:54,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:54,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-07-09 17:33:54,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 158. [2021-07-09 17:33:54,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.2038216560509554) internal successors, (346), 157 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:54,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 346 transitions. [2021-07-09 17:33:54,892 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 346 transitions. Word has length 19 [2021-07-09 17:33:54,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:54,892 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 346 transitions. [2021-07-09 17:33:54,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 346 transitions. [2021-07-09 17:33:54,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:54,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:54,892 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:55,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1865,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:55,097 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:55,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:55,097 INFO L82 PathProgramCache]: Analyzing trace with hash -913808358, now seen corresponding path program 356 times [2021-07-09 17:33:55,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:55,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337736150] [2021-07-09 17:33:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:55,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:55,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337736150] [2021-07-09 17:33:55,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337736150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:55,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883650485] [2021-07-09 17:33:55,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:55,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:55,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:55,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:55,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:55,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:55,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:55,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:55,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:55,370 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-07-09 17:33:55,370 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:55,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:33:55,371 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:33:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:55,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883650485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:55,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:55,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:55,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785046798] [2021-07-09 17:33:55,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:55,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:55,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:55,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:55,388 INFO L87 Difference]: Start difference. First operand 158 states and 346 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:55,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:55,732 INFO L93 Difference]: Finished difference Result 209 states and 448 transitions. [2021-07-09 17:33:55,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:55,733 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:55,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:55,733 INFO L225 Difference]: With dead ends: 209 [2021-07-09 17:33:55,733 INFO L226 Difference]: Without dead ends: 209 [2021-07-09 17:33:55,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 349.9ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:33:55,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-07-09 17:33:55,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 159. [2021-07-09 17:33:55,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2025316455696204) internal successors, (348), 158 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:55,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 348 transitions. [2021-07-09 17:33:55,735 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 348 transitions. Word has length 19 [2021-07-09 17:33:55,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:55,735 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 348 transitions. [2021-07-09 17:33:55,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:55,735 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 348 transitions. [2021-07-09 17:33:55,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:55,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:55,735 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:55,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1867 [2021-07-09 17:33:55,936 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:55,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:55,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1923793846, now seen corresponding path program 357 times [2021-07-09 17:33:55,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:55,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505077894] [2021-07-09 17:33:55,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:55,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:56,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:56,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505077894] [2021-07-09 17:33:56,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505077894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:56,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67567626] [2021-07-09 17:33:56,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:56,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:33:56,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:56,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:56,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:56,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:56,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:56,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:56,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:56,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:56,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:56,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:56,204 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-07-09 17:33:56,204 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:56,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:56,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:56,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:56,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:56,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:56,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:33:56,224 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:33:56,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:56,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:56,239 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:33:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:56,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67567626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:56,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:56,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:56,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295087886] [2021-07-09 17:33:56,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:56,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:56,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:56,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:56,281 INFO L87 Difference]: Start difference. First operand 159 states and 348 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:56,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:56,706 INFO L93 Difference]: Finished difference Result 223 states and 476 transitions. [2021-07-09 17:33:56,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:33:56,707 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:56,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:56,707 INFO L225 Difference]: With dead ends: 223 [2021-07-09 17:33:56,707 INFO L226 Difference]: Without dead ends: 223 [2021-07-09 17:33:56,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 356.2ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:33:56,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-07-09 17:33:56,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 160. [2021-07-09 17:33:56,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.20125786163522) internal successors, (350), 159 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:56,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 350 transitions. [2021-07-09 17:33:56,709 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 350 transitions. Word has length 19 [2021-07-09 17:33:56,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:56,709 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 350 transitions. [2021-07-09 17:33:56,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:56,709 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 350 transitions. [2021-07-09 17:33:56,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:56,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:56,709 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:56,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1869,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:56,910 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:56,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:56,910 INFO L82 PathProgramCache]: Analyzing trace with hash -563677106, now seen corresponding path program 358 times [2021-07-09 17:33:56,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:56,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653999185] [2021-07-09 17:33:56,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:56,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:56,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653999185] [2021-07-09 17:33:56,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653999185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:56,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014650352] [2021-07-09 17:33:56,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:57,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:57,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:57,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:57,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:57,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:57,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:57,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:57,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:57,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:57,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:57,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:57,217 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:33:57,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:33:57,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:57,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:57,232 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:57,232 INFO L518 ElimStorePlain]: Eliminatee v_prenex_326 vanished before elimination [2021-07-09 17:33:57,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:57,233 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:33:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:57,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014650352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:57,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:57,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:57,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583455367] [2021-07-09 17:33:57,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:57,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:57,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:57,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:57,259 INFO L87 Difference]: Start difference. First operand 160 states and 350 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:57,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:57,576 INFO L93 Difference]: Finished difference Result 183 states and 396 transitions. [2021-07-09 17:33:57,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:57,576 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:57,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:57,576 INFO L225 Difference]: With dead ends: 183 [2021-07-09 17:33:57,576 INFO L226 Difference]: Without dead ends: 183 [2021-07-09 17:33:57,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 339.9ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:33:57,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-09 17:33:57,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 157. [2021-07-09 17:33:57,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.2051282051282053) internal successors, (344), 156 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:57,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 344 transitions. [2021-07-09 17:33:57,578 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 344 transitions. Word has length 19 [2021-07-09 17:33:57,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:57,578 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 344 transitions. [2021-07-09 17:33:57,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:57,578 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 344 transitions. [2021-07-09 17:33:57,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:57,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:57,578 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:57,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1873 [2021-07-09 17:33:57,779 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:57,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:57,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1799606638, now seen corresponding path program 359 times [2021-07-09 17:33:57,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:57,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564238269] [2021-07-09 17:33:57,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:57,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:57,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:57,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564238269] [2021-07-09 17:33:57,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564238269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:57,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307039289] [2021-07-09 17:33:57,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:57,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:57,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:57,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:57,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:58,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307039289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:58,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:58,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:58,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104395175] [2021-07-09 17:33:58,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:58,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:58,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:58,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:58,020 INFO L87 Difference]: Start difference. First operand 157 states and 344 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:58,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:58,208 INFO L93 Difference]: Finished difference Result 193 states and 416 transitions. [2021-07-09 17:33:58,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:58,209 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:58,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:58,209 INFO L225 Difference]: With dead ends: 193 [2021-07-09 17:33:58,209 INFO L226 Difference]: Without dead ends: 193 [2021-07-09 17:33:58,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:33:58,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-07-09 17:33:58,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 157. [2021-07-09 17:33:58,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.2051282051282053) internal successors, (344), 156 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:58,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 344 transitions. [2021-07-09 17:33:58,211 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 344 transitions. Word has length 19 [2021-07-09 17:33:58,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:58,211 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 344 transitions. [2021-07-09 17:33:58,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:58,211 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 344 transitions. [2021-07-09 17:33:58,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:58,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:58,211 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:58,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1880,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:58,412 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:58,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:58,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1485375170, now seen corresponding path program 360 times [2021-07-09 17:33:58,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:58,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437618456] [2021-07-09 17:33:58,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:58,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:58,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:58,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437618456] [2021-07-09 17:33:58,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437618456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:58,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180826832] [2021-07-09 17:33:58,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:58,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:33:58,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:58,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:58,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:58,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180826832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:58,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:58,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:58,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844414050] [2021-07-09 17:33:58,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:58,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:58,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:58,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:58,685 INFO L87 Difference]: Start difference. First operand 157 states and 344 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:58,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:58,968 INFO L93 Difference]: Finished difference Result 218 states and 466 transitions. [2021-07-09 17:33:58,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:33:58,968 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:58,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:58,969 INFO L225 Difference]: With dead ends: 218 [2021-07-09 17:33:58,969 INFO L226 Difference]: Without dead ends: 218 [2021-07-09 17:33:58,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 314.5ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:33:58,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-07-09 17:33:58,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 158. [2021-07-09 17:33:58,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.2038216560509554) internal successors, (346), 157 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:58,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 346 transitions. [2021-07-09 17:33:58,970 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 346 transitions. Word has length 19 [2021-07-09 17:33:58,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:58,971 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 346 transitions. [2021-07-09 17:33:58,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:58,971 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 346 transitions. [2021-07-09 17:33:58,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:58,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:58,971 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:59,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1884 [2021-07-09 17:33:59,171 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:59,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:59,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1449475386, now seen corresponding path program 361 times [2021-07-09 17:33:59,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:59,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260274993] [2021-07-09 17:33:59,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:59,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:59,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260274993] [2021-07-09 17:33:59,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260274993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:59,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019203972] [2021-07-09 17:33:59,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:59,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:33:59,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:59,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:59,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:59,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:59,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:59,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:59,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:59,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:59,428 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:33:59,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:33:59,430 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:59,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:59,442 INFO L518 ElimStorePlain]: Eliminatee v_prenex_329 vanished before elimination [2021-07-09 17:33:59,442 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:33:59,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:59,442 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:33:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:59,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019203972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:59,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:59,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:59,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536468814] [2021-07-09 17:33:59,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:59,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:59,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:59,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:59,466 INFO L87 Difference]: Start difference. First operand 158 states and 346 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:59,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:59,740 INFO L93 Difference]: Finished difference Result 180 states and 390 transitions. [2021-07-09 17:33:59,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:59,741 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:59,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:59,741 INFO L225 Difference]: With dead ends: 180 [2021-07-09 17:33:59,741 INFO L226 Difference]: Without dead ends: 180 [2021-07-09 17:33:59,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 296.9ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:33:59,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-07-09 17:33:59,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 156. [2021-07-09 17:33:59,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.206451612903226) internal successors, (342), 155 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:59,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 342 transitions. [2021-07-09 17:33:59,743 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 342 transitions. Word has length 19 [2021-07-09 17:33:59,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:59,743 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 342 transitions. [2021-07-09 17:33:59,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:59,743 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 342 transitions. [2021-07-09 17:33:59,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:59,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:59,743 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:59,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1894,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:59,944 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:59,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:59,944 INFO L82 PathProgramCache]: Analyzing trace with hash -397477482, now seen corresponding path program 362 times [2021-07-09 17:33:59,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:59,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668385881] [2021-07-09 17:33:59,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:00,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:00,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668385881] [2021-07-09 17:34:00,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668385881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:00,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60114624] [2021-07-09 17:34:00,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:00,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:00,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:00,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:00,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:00,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:00,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:00,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:00,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:00,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:00,140 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:00,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:00,142 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:00,179 INFO L628 ElimStorePlain]: treesize reduction 69, result has 38.9 percent of original size [2021-07-09 17:34:00,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:34:00,183 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:00,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:00,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:00,199 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-07-09 17:34:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:00,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60114624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:00,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:00,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:00,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860245299] [2021-07-09 17:34:00,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:00,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:00,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:00,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:00,233 INFO L87 Difference]: Start difference. First operand 156 states and 342 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:00,449 INFO L93 Difference]: Finished difference Result 210 states and 438 transitions. [2021-07-09 17:34:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:34:00,450 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:00,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:00,450 INFO L225 Difference]: With dead ends: 210 [2021-07-09 17:34:00,450 INFO L226 Difference]: Without dead ends: 207 [2021-07-09 17:34:00,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 233.2ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:34:00,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-09 17:34:00,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 161. [2021-07-09 17:34:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.20625) internal successors, (353), 160 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:00,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 353 transitions. [2021-07-09 17:34:00,452 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 353 transitions. Word has length 19 [2021-07-09 17:34:00,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:00,452 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 353 transitions. [2021-07-09 17:34:00,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:00,452 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 353 transitions. [2021-07-09 17:34:00,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:00,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:00,452 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:00,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1901,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:00,653 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:00,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:00,653 INFO L82 PathProgramCache]: Analyzing trace with hash -621408950, now seen corresponding path program 363 times [2021-07-09 17:34:00,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:00,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214412027] [2021-07-09 17:34:00,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:00,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:00,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214412027] [2021-07-09 17:34:00,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214412027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:00,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134760245] [2021-07-09 17:34:00,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:00,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:34:00,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:00,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:00,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:00,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134760245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:00,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:00,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:00,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623294327] [2021-07-09 17:34:00,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:00,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:00,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:00,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:00,895 INFO L87 Difference]: Start difference. First operand 161 states and 353 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:01,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:01,129 INFO L93 Difference]: Finished difference Result 197 states and 416 transitions. [2021-07-09 17:34:01,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:01,129 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:01,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:01,130 INFO L225 Difference]: With dead ends: 197 [2021-07-09 17:34:01,130 INFO L226 Difference]: Without dead ends: 197 [2021-07-09 17:34:01,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 281.9ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:34:01,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-09 17:34:01,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 161. [2021-07-09 17:34:01,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.20625) internal successors, (353), 160 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:01,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 353 transitions. [2021-07-09 17:34:01,131 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 353 transitions. Word has length 19 [2021-07-09 17:34:01,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:01,131 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 353 transitions. [2021-07-09 17:34:01,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:01,132 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 353 transitions. [2021-07-09 17:34:01,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:01,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:01,132 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:01,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1905 [2021-07-09 17:34:01,332 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:01,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:01,333 INFO L82 PathProgramCache]: Analyzing trace with hash 738707790, now seen corresponding path program 364 times [2021-07-09 17:34:01,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:01,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550957895] [2021-07-09 17:34:01,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:01,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:01,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550957895] [2021-07-09 17:34:01,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550957895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:01,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973376272] [2021-07-09 17:34:01,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:01,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:01,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:01,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:01,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:01,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:01,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:01,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:01,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:01,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:01,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:01,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:01,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:01,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:01,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:01,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:01,550 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:01,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:01,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:01,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:01,581 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:34:01,581 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:01,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:01,582 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:34:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:01,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973376272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:01,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:01,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:01,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520931801] [2021-07-09 17:34:01,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:01,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:01,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:01,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:01,606 INFO L87 Difference]: Start difference. First operand 161 states and 353 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:01,808 INFO L93 Difference]: Finished difference Result 216 states and 452 transitions. [2021-07-09 17:34:01,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:34:01,808 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:01,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:01,808 INFO L225 Difference]: With dead ends: 216 [2021-07-09 17:34:01,808 INFO L226 Difference]: Without dead ends: 216 [2021-07-09 17:34:01,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:34:01,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-09 17:34:01,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 160. [2021-07-09 17:34:01,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.207547169811321) internal successors, (351), 159 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:01,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 351 transitions. [2021-07-09 17:34:01,810 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 351 transitions. Word has length 19 [2021-07-09 17:34:01,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:01,810 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 351 transitions. [2021-07-09 17:34:01,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:01,810 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 351 transitions. [2021-07-09 17:34:01,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:01,811 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:01,811 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:02,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1917,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:02,011 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:02,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:02,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1494344204, now seen corresponding path program 365 times [2021-07-09 17:34:02,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:02,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633002416] [2021-07-09 17:34:02,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:02,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:02,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633002416] [2021-07-09 17:34:02,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633002416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:02,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467670009] [2021-07-09 17:34:02,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:02,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:34:02,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:02,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:02,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:02,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467670009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:02,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:02,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:02,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188059032] [2021-07-09 17:34:02,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:02,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:02,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:02,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:02,234 INFO L87 Difference]: Start difference. First operand 160 states and 351 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:02,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:02,447 INFO L93 Difference]: Finished difference Result 170 states and 367 transitions. [2021-07-09 17:34:02,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:02,448 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:02,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:02,448 INFO L225 Difference]: With dead ends: 170 [2021-07-09 17:34:02,448 INFO L226 Difference]: Without dead ends: 166 [2021-07-09 17:34:02,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 260.4ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:02,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-09 17:34:02,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2021-07-09 17:34:02,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.20125786163522) internal successors, (350), 159 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:02,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 350 transitions. [2021-07-09 17:34:02,450 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 350 transitions. Word has length 19 [2021-07-09 17:34:02,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:02,450 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 350 transitions. [2021-07-09 17:34:02,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:02,450 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 350 transitions. [2021-07-09 17:34:02,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:02,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:02,450 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:02,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1927,366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:02,651 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:02,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:02,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1407462970, now seen corresponding path program 366 times [2021-07-09 17:34:02,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:02,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939376577] [2021-07-09 17:34:02,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:02,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:02,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939376577] [2021-07-09 17:34:02,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939376577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:02,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728283023] [2021-07-09 17:34:02,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:02,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:34:02,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:02,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:02,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:02,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:02,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:02,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:02,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:02,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:02,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:02,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:02,868 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-07-09 17:34:02,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:02,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:34:02,871 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:02,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:02,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:02,877 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-07-09 17:34:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:02,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728283023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:02,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:02,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:02,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218152675] [2021-07-09 17:34:02,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:02,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:02,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:02,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:02,894 INFO L87 Difference]: Start difference. First operand 160 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:03,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:03,051 INFO L93 Difference]: Finished difference Result 187 states and 402 transitions. [2021-07-09 17:34:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:34:03,051 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:03,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:03,051 INFO L225 Difference]: With dead ends: 187 [2021-07-09 17:34:03,051 INFO L226 Difference]: Without dead ends: 187 [2021-07-09 17:34:03,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 182.6ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:03,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-07-09 17:34:03,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 151. [2021-07-09 17:34:03,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2) internal successors, (330), 150 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:03,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 330 transitions. [2021-07-09 17:34:03,053 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 330 transitions. Word has length 19 [2021-07-09 17:34:03,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:03,053 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 330 transitions. [2021-07-09 17:34:03,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:03,053 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 330 transitions. [2021-07-09 17:34:03,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:03,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:03,053 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:03,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1931,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:03,254 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:03,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:03,254 INFO L82 PathProgramCache]: Analyzing trace with hash -43204718, now seen corresponding path program 367 times [2021-07-09 17:34:03,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:03,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120521661] [2021-07-09 17:34:03,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:03,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:03,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120521661] [2021-07-09 17:34:03,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120521661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:03,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548571860] [2021-07-09 17:34:03,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:03,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:03,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:03,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548571860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:03,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:03,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:03,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515954110] [2021-07-09 17:34:03,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:03,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:03,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:03,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:03,513 INFO L87 Difference]: Start difference. First operand 151 states and 330 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:03,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:03,665 INFO L93 Difference]: Finished difference Result 189 states and 406 transitions. [2021-07-09 17:34:03,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:03,665 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:03,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:03,665 INFO L225 Difference]: With dead ends: 189 [2021-07-09 17:34:03,665 INFO L226 Difference]: Without dead ends: 189 [2021-07-09 17:34:03,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:03,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-07-09 17:34:03,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 153. [2021-07-09 17:34:03,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1973684210526314) internal successors, (334), 152 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:03,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 334 transitions. [2021-07-09 17:34:03,667 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 334 transitions. Word has length 19 [2021-07-09 17:34:03,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:03,667 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 334 transitions. [2021-07-09 17:34:03,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:03,667 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 334 transitions. [2021-07-09 17:34:03,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:03,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:03,667 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:03,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1932 [2021-07-09 17:34:03,868 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:03,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:03,868 INFO L82 PathProgramCache]: Analyzing trace with hash -403121236, now seen corresponding path program 368 times [2021-07-09 17:34:03,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:03,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125406875] [2021-07-09 17:34:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:03,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:03,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125406875] [2021-07-09 17:34:03,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125406875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:03,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470321048] [2021-07-09 17:34:03,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:03,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:03,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:03,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:03,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:04,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:04,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:04,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:04,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:04,130 INFO L628 ElimStorePlain]: treesize reduction 78, result has 35.5 percent of original size [2021-07-09 17:34:04,131 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:04,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:34:04,133 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:04,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:04,147 INFO L518 ElimStorePlain]: Eliminatee v_prenex_332 vanished before elimination [2021-07-09 17:34:04,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:04,148 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:34:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:04,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470321048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:04,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:04,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:04,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683332201] [2021-07-09 17:34:04,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:04,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:04,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:04,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:04,188 INFO L87 Difference]: Start difference. First operand 153 states and 334 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:04,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:04,354 INFO L93 Difference]: Finished difference Result 215 states and 458 transitions. [2021-07-09 17:34:04,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:04,355 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:04,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:04,355 INFO L225 Difference]: With dead ends: 215 [2021-07-09 17:34:04,355 INFO L226 Difference]: Without dead ends: 215 [2021-07-09 17:34:04,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 168.6ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:04,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-07-09 17:34:04,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 154. [2021-07-09 17:34:04,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.196078431372549) internal successors, (336), 153 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:04,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 336 transitions. [2021-07-09 17:34:04,357 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 336 transitions. Word has length 19 [2021-07-09 17:34:04,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:04,357 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 336 transitions. [2021-07-09 17:34:04,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:04,357 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 336 transitions. [2021-07-09 17:34:04,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:04,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:04,357 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:04,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1936,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:04,558 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:04,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:04,558 INFO L82 PathProgramCache]: Analyzing trace with hash 306926534, now seen corresponding path program 369 times [2021-07-09 17:34:04,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:04,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416770242] [2021-07-09 17:34:04,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:04,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:04,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416770242] [2021-07-09 17:34:04,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416770242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:04,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064224488] [2021-07-09 17:34:04,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:04,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:34:04,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:04,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:04,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:04,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:04,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:04,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:04,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:04,818 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:34:04,818 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:04,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:34:04,820 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:04,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:04,832 INFO L518 ElimStorePlain]: Eliminatee v_prenex_335 vanished before elimination [2021-07-09 17:34:04,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:04,832 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:34:04,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:04,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064224488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:04,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:04,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:04,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107866706] [2021-07-09 17:34:04,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:04,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:04,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:04,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:04,860 INFO L87 Difference]: Start difference. First operand 154 states and 336 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:05,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:05,048 INFO L93 Difference]: Finished difference Result 174 states and 376 transitions. [2021-07-09 17:34:05,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:05,049 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:05,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:05,049 INFO L225 Difference]: With dead ends: 174 [2021-07-09 17:34:05,049 INFO L226 Difference]: Without dead ends: 174 [2021-07-09 17:34:05,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:05,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-09 17:34:05,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 152. [2021-07-09 17:34:05,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.198675496688742) internal successors, (332), 151 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:05,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 332 transitions. [2021-07-09 17:34:05,051 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 332 transitions. Word has length 19 [2021-07-09 17:34:05,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:05,051 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 332 transitions. [2021-07-09 17:34:05,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:05,051 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 332 transitions. [2021-07-09 17:34:05,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:05,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:05,051 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:05,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1940 [2021-07-09 17:34:05,268 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:05,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:05,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1134992970, now seen corresponding path program 370 times [2021-07-09 17:34:05,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:05,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936347097] [2021-07-09 17:34:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:05,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:05,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936347097] [2021-07-09 17:34:05,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936347097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:05,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000052053] [2021-07-09 17:34:05,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:05,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:05,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:05,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:05,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:05,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000052053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:05,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:05,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:05,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226595000] [2021-07-09 17:34:05,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:05,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:05,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:05,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:05,511 INFO L87 Difference]: Start difference. First operand 152 states and 332 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:05,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:05,755 INFO L93 Difference]: Finished difference Result 190 states and 400 transitions. [2021-07-09 17:34:05,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:05,755 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:05,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:05,755 INFO L225 Difference]: With dead ends: 190 [2021-07-09 17:34:05,755 INFO L226 Difference]: Without dead ends: 190 [2021-07-09 17:34:05,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 273.2ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:34:05,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-07-09 17:34:05,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2021-07-09 17:34:05,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2026143790849675) internal successors, (337), 153 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:05,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 337 transitions. [2021-07-09 17:34:05,757 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 337 transitions. Word has length 19 [2021-07-09 17:34:05,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:05,757 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 337 transitions. [2021-07-09 17:34:05,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:05,757 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 337 transitions. [2021-07-09 17:34:05,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:05,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:05,757 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:05,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1947 [2021-07-09 17:34:05,958 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:05,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:05,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1149788616, now seen corresponding path program 371 times [2021-07-09 17:34:05,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:05,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705157877] [2021-07-09 17:34:05,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:06,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:06,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705157877] [2021-07-09 17:34:06,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705157877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:06,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596018926] [2021-07-09 17:34:06,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:06,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:34:06,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:06,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:06,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:06,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:06,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:06,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:06,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:06,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:06,178 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:06,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:06,181 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:06,210 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:34:06,210 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:06,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:06,211 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:34:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:06,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596018926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:06,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:06,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:06,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121492920] [2021-07-09 17:34:06,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:06,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:06,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:06,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:06,235 INFO L87 Difference]: Start difference. First operand 154 states and 337 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:06,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:06,503 INFO L93 Difference]: Finished difference Result 221 states and 460 transitions. [2021-07-09 17:34:06,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:34:06,503 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:06,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:06,503 INFO L225 Difference]: With dead ends: 221 [2021-07-09 17:34:06,504 INFO L226 Difference]: Without dead ends: 221 [2021-07-09 17:34:06,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 267.3ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:06,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-07-09 17:34:06,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 155. [2021-07-09 17:34:06,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.220779220779221) internal successors, (342), 154 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:06,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 342 transitions. [2021-07-09 17:34:06,505 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 342 transitions. Word has length 19 [2021-07-09 17:34:06,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:06,505 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 342 transitions. [2021-07-09 17:34:06,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:06,505 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 342 transitions. [2021-07-09 17:34:06,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:06,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:06,506 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:06,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1957,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:06,706 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:06,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:06,706 INFO L82 PathProgramCache]: Analyzing trace with hash 262057716, now seen corresponding path program 372 times [2021-07-09 17:34:06,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:06,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963407754] [2021-07-09 17:34:06,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:06,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:06,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963407754] [2021-07-09 17:34:06,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963407754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:06,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025471349] [2021-07-09 17:34:06,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:06,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:34:06,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:06,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:06,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:06,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025471349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:06,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:06,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:06,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130426540] [2021-07-09 17:34:06,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:06,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:06,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:06,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:06,944 INFO L87 Difference]: Start difference. First operand 155 states and 342 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:07,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:07,170 INFO L93 Difference]: Finished difference Result 164 states and 356 transitions. [2021-07-09 17:34:07,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:07,170 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:07,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:07,170 INFO L225 Difference]: With dead ends: 164 [2021-07-09 17:34:07,170 INFO L226 Difference]: Without dead ends: 160 [2021-07-09 17:34:07,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 273.2ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:07,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-07-09 17:34:07,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2021-07-09 17:34:07,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2142857142857144) internal successors, (341), 154 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 341 transitions. [2021-07-09 17:34:07,172 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 341 transitions. Word has length 19 [2021-07-09 17:34:07,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:07,172 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 341 transitions. [2021-07-09 17:34:07,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:07,172 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 341 transitions. [2021-07-09 17:34:07,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:07,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:07,173 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:07,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1967 [2021-07-09 17:34:07,373 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:07,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:07,373 INFO L82 PathProgramCache]: Analyzing trace with hash 348938950, now seen corresponding path program 373 times [2021-07-09 17:34:07,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:07,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903878607] [2021-07-09 17:34:07,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:07,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:07,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903878607] [2021-07-09 17:34:07,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903878607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:07,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901668527] [2021-07-09 17:34:07,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:07,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:07,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:07,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:07,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:07,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:07,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:07,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:07,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:07,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:07,620 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-07-09 17:34:07,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:07,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:34:07,623 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:07,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:07,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:07,629 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-07-09 17:34:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:07,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901668527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:07,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:07,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:07,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720747679] [2021-07-09 17:34:07,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:07,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:07,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:07,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:07,647 INFO L87 Difference]: Start difference. First operand 155 states and 341 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:07,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:07,804 INFO L93 Difference]: Finished difference Result 184 states and 396 transitions. [2021-07-09 17:34:07,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:07,804 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:07,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:07,804 INFO L225 Difference]: With dead ends: 184 [2021-07-09 17:34:07,804 INFO L226 Difference]: Without dead ends: 184 [2021-07-09 17:34:07,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:34:07,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-07-09 17:34:07,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 151. [2021-07-09 17:34:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2) internal successors, (330), 150 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:07,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 330 transitions. [2021-07-09 17:34:07,806 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 330 transitions. Word has length 19 [2021-07-09 17:34:07,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:07,806 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 330 transitions. [2021-07-09 17:34:07,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 330 transitions. [2021-07-09 17:34:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:07,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:07,806 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:08,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1971 [2021-07-09 17:34:08,007 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:08,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:08,007 INFO L82 PathProgramCache]: Analyzing trace with hash 473126158, now seen corresponding path program 374 times [2021-07-09 17:34:08,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:08,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155697411] [2021-07-09 17:34:08,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:08,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:08,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155697411] [2021-07-09 17:34:08,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155697411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:08,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775735191] [2021-07-09 17:34:08,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:08,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:08,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:08,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:08,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:08,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:08,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:08,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:08,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:08,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:08,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:08,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:08,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:08,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:08,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:08,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:08,219 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:08,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:08,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:08,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:08,259 INFO L628 ElimStorePlain]: treesize reduction 69, result has 38.9 percent of original size [2021-07-09 17:34:08,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:08,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:34:08,262 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:08,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:08,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:08,278 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-07-09 17:34:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:08,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775735191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:08,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:08,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:08,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522500067] [2021-07-09 17:34:08,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:08,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:08,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:08,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:08,308 INFO L87 Difference]: Start difference. First operand 151 states and 330 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:08,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:08,705 INFO L93 Difference]: Finished difference Result 213 states and 445 transitions. [2021-07-09 17:34:08,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:34:08,705 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:08,706 INFO L225 Difference]: With dead ends: 213 [2021-07-09 17:34:08,706 INFO L226 Difference]: Without dead ends: 210 [2021-07-09 17:34:08,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 415.7ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:34:08,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-07-09 17:34:08,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 160. [2021-07-09 17:34:08,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2264150943396226) internal successors, (354), 159 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:08,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 354 transitions. [2021-07-09 17:34:08,707 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 354 transitions. Word has length 19 [2021-07-09 17:34:08,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:08,708 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 354 transitions. [2021-07-09 17:34:08,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:08,708 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 354 transitions. [2021-07-09 17:34:08,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:08,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:08,708 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:08,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1972,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:08,908 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:08,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:08,909 INFO L82 PathProgramCache]: Analyzing trace with hash 249194690, now seen corresponding path program 375 times [2021-07-09 17:34:08,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:08,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465682798] [2021-07-09 17:34:08,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:08,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:08,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465682798] [2021-07-09 17:34:08,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465682798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:08,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366967471] [2021-07-09 17:34:08,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:09,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:34:09,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:09,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:09,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:09,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366967471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:09,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:09,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:09,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563528886] [2021-07-09 17:34:09,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:09,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:09,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:09,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:09,170 INFO L87 Difference]: Start difference. First operand 160 states and 354 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:09,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:09,525 INFO L93 Difference]: Finished difference Result 197 states and 418 transitions. [2021-07-09 17:34:09,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:34:09,525 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:09,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:09,525 INFO L225 Difference]: With dead ends: 197 [2021-07-09 17:34:09,525 INFO L226 Difference]: Without dead ends: 197 [2021-07-09 17:34:09,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 373.6ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:09,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-09 17:34:09,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 160. [2021-07-09 17:34:09,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2264150943396226) internal successors, (354), 159 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:09,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 354 transitions. [2021-07-09 17:34:09,527 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 354 transitions. Word has length 19 [2021-07-09 17:34:09,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:09,527 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 354 transitions. [2021-07-09 17:34:09,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:09,527 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 354 transitions. [2021-07-09 17:34:09,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:09,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:09,527 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:09,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1976 [2021-07-09 17:34:09,728 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:09,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:09,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1161596142, now seen corresponding path program 376 times [2021-07-09 17:34:09,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:09,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904976493] [2021-07-09 17:34:09,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:09,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:09,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904976493] [2021-07-09 17:34:09,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904976493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:09,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509814472] [2021-07-09 17:34:09,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:09,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:09,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:09,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:09,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:09,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509814472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:09,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:09,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:09,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547404424] [2021-07-09 17:34:09,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:09,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:09,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:09,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:09,996 INFO L87 Difference]: Start difference. First operand 160 states and 354 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:10,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:10,403 INFO L93 Difference]: Finished difference Result 199 states and 419 transitions. [2021-07-09 17:34:10,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:10,403 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:10,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:10,404 INFO L225 Difference]: With dead ends: 199 [2021-07-09 17:34:10,404 INFO L226 Difference]: Without dead ends: 197 [2021-07-09 17:34:10,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 437.6ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:10,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-09 17:34:10,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 160. [2021-07-09 17:34:10,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.220125786163522) internal successors, (353), 159 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:10,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 353 transitions. [2021-07-09 17:34:10,405 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 353 transitions. Word has length 19 [2021-07-09 17:34:10,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:10,405 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 353 transitions. [2021-07-09 17:34:10,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:10,405 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 353 transitions. [2021-07-09 17:34:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:10,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:10,406 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:10,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1986,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:10,606 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:10,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:10,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1609311430, now seen corresponding path program 377 times [2021-07-09 17:34:10,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:10,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890012065] [2021-07-09 17:34:10,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:10,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:10,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890012065] [2021-07-09 17:34:10,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890012065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:10,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669774190] [2021-07-09 17:34:10,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:10,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:34:10,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:10,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:10,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:10,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:10,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:10,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:10,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:10,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:10,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:10,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:10,843 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:10,872 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:34:10,872 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:10,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:10,873 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:34:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:10,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669774190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:10,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:10,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:10,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544556036] [2021-07-09 17:34:10,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:10,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:10,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:10,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:10,897 INFO L87 Difference]: Start difference. First operand 160 states and 353 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:11,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:11,259 INFO L93 Difference]: Finished difference Result 224 states and 468 transitions. [2021-07-09 17:34:11,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:34:11,259 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:11,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:11,260 INFO L225 Difference]: With dead ends: 224 [2021-07-09 17:34:11,260 INFO L226 Difference]: Without dead ends: 224 [2021-07-09 17:34:11,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 391.4ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:34:11,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-09 17:34:11,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 159. [2021-07-09 17:34:11,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.221518987341772) internal successors, (351), 158 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:11,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-07-09 17:34:11,262 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 19 [2021-07-09 17:34:11,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:11,262 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-07-09 17:34:11,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:11,263 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-07-09 17:34:11,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:11,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:11,263 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:11,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1996 [2021-07-09 17:34:11,477 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:11,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:11,477 INFO L82 PathProgramCache]: Analyzing trace with hash -623740564, now seen corresponding path program 378 times [2021-07-09 17:34:11,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:11,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62516101] [2021-07-09 17:34:11,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:11,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:11,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62516101] [2021-07-09 17:34:11,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62516101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:11,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230619984] [2021-07-09 17:34:11,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:11,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:34:11,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:11,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:11,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:11,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230619984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:11,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:11,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:11,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705692215] [2021-07-09 17:34:11,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:11,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:11,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:11,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:11,720 INFO L87 Difference]: Start difference. First operand 159 states and 351 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:11,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:11,954 INFO L93 Difference]: Finished difference Result 170 states and 367 transitions. [2021-07-09 17:34:11,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:34:11,955 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:11,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:11,955 INFO L225 Difference]: With dead ends: 170 [2021-07-09 17:34:11,955 INFO L226 Difference]: Without dead ends: 166 [2021-07-09 17:34:11,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 298.0ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:34:11,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-09 17:34:11,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 159. [2021-07-09 17:34:11,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2151898734177213) internal successors, (350), 158 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:11,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 350 transitions. [2021-07-09 17:34:11,957 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 350 transitions. Word has length 19 [2021-07-09 17:34:11,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:11,957 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 350 transitions. [2021-07-09 17:34:11,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:11,957 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 350 transitions. [2021-07-09 17:34:11,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:11,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:11,958 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:12,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2008,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:12,161 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:12,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:12,161 INFO L82 PathProgramCache]: Analyzing trace with hash -536859330, now seen corresponding path program 379 times [2021-07-09 17:34:12,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:12,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407703945] [2021-07-09 17:34:12,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:12,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:12,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407703945] [2021-07-09 17:34:12,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407703945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:12,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670197940] [2021-07-09 17:34:12,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:12,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:12,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:12,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:12,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:12,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:12,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:12,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:12,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:12,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:12,405 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-07-09 17:34:12,405 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:12,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:12,406 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-07-09 17:34:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:12,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670197940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:12,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:12,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:12,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160689609] [2021-07-09 17:34:12,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:12,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:12,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:12,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:12,424 INFO L87 Difference]: Start difference. First operand 159 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:12,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:12,770 INFO L93 Difference]: Finished difference Result 196 states and 419 transitions. [2021-07-09 17:34:12,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:12,770 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:12,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:12,771 INFO L225 Difference]: With dead ends: 196 [2021-07-09 17:34:12,771 INFO L226 Difference]: Without dead ends: 196 [2021-07-09 17:34:12,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 404.6ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:34:12,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-07-09 17:34:12,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 158. [2021-07-09 17:34:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.21656050955414) internal successors, (348), 157 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 348 transitions. [2021-07-09 17:34:12,773 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 348 transitions. Word has length 19 [2021-07-09 17:34:12,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:12,773 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 348 transitions. [2021-07-09 17:34:12,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:12,773 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 348 transitions. [2021-07-09 17:34:12,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:12,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:12,773 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:12,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2012 [2021-07-09 17:34:12,974 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:12,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:12,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1130086830, now seen corresponding path program 380 times [2021-07-09 17:34:12,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:12,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440920858] [2021-07-09 17:34:12,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:13,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:13,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440920858] [2021-07-09 17:34:13,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440920858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:13,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912366850] [2021-07-09 17:34:13,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:13,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:13,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:13,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:13,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:13,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912366850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:13,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:13,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:13,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276878723] [2021-07-09 17:34:13,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:13,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:13,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:13,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:13,188 INFO L87 Difference]: Start difference. First operand 158 states and 348 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:13,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:13,333 INFO L93 Difference]: Finished difference Result 167 states and 361 transitions. [2021-07-09 17:34:13,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:34:13,333 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:13,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:13,333 INFO L225 Difference]: With dead ends: 167 [2021-07-09 17:34:13,333 INFO L226 Difference]: Without dead ends: 161 [2021-07-09 17:34:13,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 202.3ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:34:13,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-09 17:34:13,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2021-07-09 17:34:13,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.210191082802548) internal successors, (347), 157 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:13,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 347 transitions. [2021-07-09 17:34:13,335 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 347 transitions. Word has length 19 [2021-07-09 17:34:13,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:13,335 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 347 transitions. [2021-07-09 17:34:13,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:13,335 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 347 transitions. [2021-07-09 17:34:13,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:13,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:13,335 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:13,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2013 [2021-07-09 17:34:13,536 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:13,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1651323846, now seen corresponding path program 381 times [2021-07-09 17:34:13,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:13,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818903781] [2021-07-09 17:34:13,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:13,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:13,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818903781] [2021-07-09 17:34:13,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818903781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:13,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334303607] [2021-07-09 17:34:13,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:13,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:34:13,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:13,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:13,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:13,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:13,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:13,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,752 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-07-09 17:34:13,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:34:13,755 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:13,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:13,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,761 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-07-09 17:34:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:13,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334303607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:13,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:13,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:13,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077916614] [2021-07-09 17:34:13,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:13,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:13,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:13,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:13,778 INFO L87 Difference]: Start difference. First operand 158 states and 347 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:13,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:13,965 INFO L93 Difference]: Finished difference Result 184 states and 395 transitions. [2021-07-09 17:34:13,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:13,966 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:13,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:13,966 INFO L225 Difference]: With dead ends: 184 [2021-07-09 17:34:13,966 INFO L226 Difference]: Without dead ends: 184 [2021-07-09 17:34:13,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 185.7ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:13,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-07-09 17:34:13,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 150. [2021-07-09 17:34:13,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.2013422818791946) internal successors, (328), 149 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:13,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 328 transitions. [2021-07-09 17:34:13,967 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 328 transitions. Word has length 19 [2021-07-09 17:34:13,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:13,968 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 328 transitions. [2021-07-09 17:34:13,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:13,968 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 328 transitions. [2021-07-09 17:34:13,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:13,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:13,968 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:14,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2017,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:14,168 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:14,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:14,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1440748214, now seen corresponding path program 382 times [2021-07-09 17:34:14,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:14,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98103699] [2021-07-09 17:34:14,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:14,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:14,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98103699] [2021-07-09 17:34:14,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98103699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:14,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074913959] [2021-07-09 17:34:14,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:14,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:14,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:14,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:14,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:14,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074913959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:14,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:14,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:14,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388611804] [2021-07-09 17:34:14,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:14,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:14,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:14,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:14,447 INFO L87 Difference]: Start difference. First operand 150 states and 328 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:14,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:14,815 INFO L93 Difference]: Finished difference Result 193 states and 405 transitions. [2021-07-09 17:34:14,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:14,815 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:14,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:14,816 INFO L225 Difference]: With dead ends: 193 [2021-07-09 17:34:14,816 INFO L226 Difference]: Without dead ends: 193 [2021-07-09 17:34:14,816 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 403.9ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:14,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-07-09 17:34:14,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 153. [2021-07-09 17:34:14,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.210526315789474) internal successors, (336), 152 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:14,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 336 transitions. [2021-07-09 17:34:14,817 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 336 transitions. Word has length 19 [2021-07-09 17:34:14,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:14,817 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 336 transitions. [2021-07-09 17:34:14,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:14,818 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 336 transitions. [2021-07-09 17:34:14,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:14,818 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:14,818 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:15,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2018 [2021-07-09 17:34:15,018 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:15,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:15,018 INFO L82 PathProgramCache]: Analyzing trace with hash -80631474, now seen corresponding path program 383 times [2021-07-09 17:34:15,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:15,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916973137] [2021-07-09 17:34:15,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:15,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:15,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916973137] [2021-07-09 17:34:15,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916973137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:15,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501179699] [2021-07-09 17:34:15,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:15,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:34:15,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:15,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:15,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:15,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:15,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:15,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:15,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:15,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:15,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:15,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:15,267 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:15,295 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:34:15,296 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:15,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:15,296 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:34:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:15,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501179699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:15,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:15,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:15,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225720856] [2021-07-09 17:34:15,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:15,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:15,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:15,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:15,321 INFO L87 Difference]: Start difference. First operand 153 states and 336 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:15,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:15,900 INFO L93 Difference]: Finished difference Result 229 states and 475 transitions. [2021-07-09 17:34:15,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:34:15,900 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:15,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:15,900 INFO L225 Difference]: With dead ends: 229 [2021-07-09 17:34:15,900 INFO L226 Difference]: Without dead ends: 229 [2021-07-09 17:34:15,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 542.7ms TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:34:15,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-07-09 17:34:15,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 156. [2021-07-09 17:34:15,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.238709677419355) internal successors, (347), 155 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 347 transitions. [2021-07-09 17:34:15,902 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 347 transitions. Word has length 19 [2021-07-09 17:34:15,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:15,902 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 347 transitions. [2021-07-09 17:34:15,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:15,902 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 347 transitions. [2021-07-09 17:34:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:15,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:15,902 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:16,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2028 [2021-07-09 17:34:16,103 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:16,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:16,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1981283828, now seen corresponding path program 384 times [2021-07-09 17:34:16,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:16,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818104106] [2021-07-09 17:34:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:16,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:16,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818104106] [2021-07-09 17:34:16,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818104106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:16,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157303310] [2021-07-09 17:34:16,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:16,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:34:16,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:16,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:16,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:16,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157303310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:16,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:16,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:16,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393974726] [2021-07-09 17:34:16,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:16,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:16,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:16,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:16,379 INFO L87 Difference]: Start difference. First operand 156 states and 347 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:16,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:16,618 INFO L93 Difference]: Finished difference Result 170 states and 368 transitions. [2021-07-09 17:34:16,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:34:16,619 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:16,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:16,619 INFO L225 Difference]: With dead ends: 170 [2021-07-09 17:34:16,619 INFO L226 Difference]: Without dead ends: 166 [2021-07-09 17:34:16,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:16,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-09 17:34:16,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 156. [2021-07-09 17:34:16,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.232258064516129) internal successors, (346), 155 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:16,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 346 transitions. [2021-07-09 17:34:16,621 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 346 transitions. Word has length 19 [2021-07-09 17:34:16,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:16,621 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 346 transitions. [2021-07-09 17:34:16,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:16,621 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 346 transitions. [2021-07-09 17:34:16,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:16,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:16,621 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:16,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2040,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:16,825 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:16,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:16,825 INFO L82 PathProgramCache]: Analyzing trace with hash 2068165062, now seen corresponding path program 385 times [2021-07-09 17:34:16,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:16,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764534757] [2021-07-09 17:34:16,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:16,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:16,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764534757] [2021-07-09 17:34:16,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764534757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:16,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714074137] [2021-07-09 17:34:16,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:16,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:16,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:17,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:17,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:17,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:17,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:17,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:17,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:17,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:17,070 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-07-09 17:34:17,071 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:17,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:17,071 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-07-09 17:34:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:17,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714074137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:17,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:17,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:17,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880525763] [2021-07-09 17:34:17,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:17,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:17,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:17,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:17,090 INFO L87 Difference]: Start difference. First operand 156 states and 346 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:17,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:17,504 INFO L93 Difference]: Finished difference Result 201 states and 430 transitions. [2021-07-09 17:34:17,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:34:17,504 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:17,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:17,505 INFO L225 Difference]: With dead ends: 201 [2021-07-09 17:34:17,505 INFO L226 Difference]: Without dead ends: 201 [2021-07-09 17:34:17,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 432.1ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:34:17,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-07-09 17:34:17,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 155. [2021-07-09 17:34:17,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2337662337662336) internal successors, (344), 154 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:17,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 344 transitions. [2021-07-09 17:34:17,507 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 344 transitions. Word has length 19 [2021-07-09 17:34:17,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:17,507 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 344 transitions. [2021-07-09 17:34:17,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:17,507 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 344 transitions. [2021-07-09 17:34:17,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:17,507 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:17,507 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:17,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2044,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:17,707 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:17,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:17,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1474937562, now seen corresponding path program 386 times [2021-07-09 17:34:17,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:17,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080027971] [2021-07-09 17:34:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:17,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:17,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080027971] [2021-07-09 17:34:17,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080027971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:17,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970796808] [2021-07-09 17:34:17,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:17,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:17,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:17,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:17,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:17,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970796808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:17,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:17,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:17,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829137762] [2021-07-09 17:34:17,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:17,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:17,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:17,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:17,974 INFO L87 Difference]: Start difference. First operand 155 states and 344 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:18,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:18,169 INFO L93 Difference]: Finished difference Result 168 states and 363 transitions. [2021-07-09 17:34:18,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:34:18,169 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:18,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:18,169 INFO L225 Difference]: With dead ends: 168 [2021-07-09 17:34:18,169 INFO L226 Difference]: Without dead ends: 162 [2021-07-09 17:34:18,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 276.3ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:18,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-07-09 17:34:18,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2021-07-09 17:34:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.227272727272727) internal successors, (343), 154 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:18,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 343 transitions. [2021-07-09 17:34:18,171 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 343 transitions. Word has length 19 [2021-07-09 17:34:18,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:18,171 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 343 transitions. [2021-07-09 17:34:18,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 343 transitions. [2021-07-09 17:34:18,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:18,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:18,171 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:18,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2045 [2021-07-09 17:34:18,372 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:18,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:18,372 INFO L82 PathProgramCache]: Analyzing trace with hash -38619058, now seen corresponding path program 387 times [2021-07-09 17:34:18,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:18,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471411486] [2021-07-09 17:34:18,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:18,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:18,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471411486] [2021-07-09 17:34:18,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471411486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:18,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819598288] [2021-07-09 17:34:18,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:18,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:34:18,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:18,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:18,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:18,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:18,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:18,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:18,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:18,636 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-07-09 17:34:18,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:34:18,639 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:18,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:18,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:18,645 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-07-09 17:34:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:18,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819598288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:18,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:18,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:18,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209028909] [2021-07-09 17:34:18,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:18,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:18,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:18,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:18,664 INFO L87 Difference]: Start difference. First operand 155 states and 343 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:18,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:18,988 INFO L93 Difference]: Finished difference Result 194 states and 417 transitions. [2021-07-09 17:34:18,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:18,988 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:18,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:18,988 INFO L225 Difference]: With dead ends: 194 [2021-07-09 17:34:18,988 INFO L226 Difference]: Without dead ends: 194 [2021-07-09 17:34:18,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 364.9ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:34:18,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-07-09 17:34:18,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 154. [2021-07-09 17:34:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2287581699346406) internal successors, (341), 153 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:18,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 341 transitions. [2021-07-09 17:34:18,990 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 341 transitions. Word has length 19 [2021-07-09 17:34:18,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:18,990 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 341 transitions. [2021-07-09 17:34:18,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:18,990 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 341 transitions. [2021-07-09 17:34:18,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:18,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:18,991 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:19,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2049 [2021-07-09 17:34:19,191 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:19,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:19,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1336894796, now seen corresponding path program 388 times [2021-07-09 17:34:19,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:19,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097450640] [2021-07-09 17:34:19,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:19,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:19,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097450640] [2021-07-09 17:34:19,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097450640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:19,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851500417] [2021-07-09 17:34:19,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:19,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:19,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:19,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:19,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:19,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851500417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:19,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:19,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:19,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890737129] [2021-07-09 17:34:19,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:19,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:19,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:19,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:19,409 INFO L87 Difference]: Start difference. First operand 154 states and 341 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:19,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:19,570 INFO L93 Difference]: Finished difference Result 165 states and 357 transitions. [2021-07-09 17:34:19,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:34:19,570 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:19,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:19,570 INFO L225 Difference]: With dead ends: 165 [2021-07-09 17:34:19,570 INFO L226 Difference]: Without dead ends: 157 [2021-07-09 17:34:19,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 232.3ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:34:19,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-09 17:34:19,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2021-07-09 17:34:19,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2222222222222223) internal successors, (340), 153 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:19,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 340 transitions. [2021-07-09 17:34:19,572 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 340 transitions. Word has length 19 [2021-07-09 17:34:19,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:19,572 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 340 transitions. [2021-07-09 17:34:19,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:19,572 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 340 transitions. [2021-07-09 17:34:19,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:19,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:19,572 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:19,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2050,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:19,773 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:19,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:19,773 INFO L82 PathProgramCache]: Analyzing trace with hash -924417338, now seen corresponding path program 389 times [2021-07-09 17:34:19,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:19,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286870064] [2021-07-09 17:34:19,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:19,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:19,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286870064] [2021-07-09 17:34:19,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286870064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:19,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140266154] [2021-07-09 17:34:19,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:19,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:34:19,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:19,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:19,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:19,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:19,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:19,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,999 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:34:19,999 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:19,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,999 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:34:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:20,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140266154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:20,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:20,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:20,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001926927] [2021-07-09 17:34:20,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:20,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:20,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:20,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:20,007 INFO L87 Difference]: Start difference. First operand 154 states and 340 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:20,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:20,115 INFO L93 Difference]: Finished difference Result 174 states and 375 transitions. [2021-07-09 17:34:20,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:34:20,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:20,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:20,116 INFO L225 Difference]: With dead ends: 174 [2021-07-09 17:34:20,116 INFO L226 Difference]: Without dead ends: 174 [2021-07-09 17:34:20,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:20,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-09 17:34:20,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 151. [2021-07-09 17:34:20,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2) internal successors, (330), 150 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:20,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 330 transitions. [2021-07-09 17:34:20,118 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 330 transitions. Word has length 19 [2021-07-09 17:34:20,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:20,118 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 330 transitions. [2021-07-09 17:34:20,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:20,118 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 330 transitions. [2021-07-09 17:34:20,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:20,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:20,118 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:20,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2054 [2021-07-09 17:34:20,318 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:20,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:20,319 INFO L82 PathProgramCache]: Analyzing trace with hash -2089052390, now seen corresponding path program 390 times [2021-07-09 17:34:20,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:20,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558922288] [2021-07-09 17:34:20,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:20,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:20,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558922288] [2021-07-09 17:34:20,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558922288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:20,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647130685] [2021-07-09 17:34:20,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:20,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:34:20,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:20,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:20,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:20,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:20,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:20,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:20,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:20,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:20,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:20,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:20,582 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-07-09 17:34:20,582 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:20,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:20,582 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-07-09 17:34:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:20,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647130685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:20,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:20,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:20,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956311962] [2021-07-09 17:34:20,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:20,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:20,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:20,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:20,600 INFO L87 Difference]: Start difference. First operand 151 states and 330 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:20,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:20,710 INFO L93 Difference]: Finished difference Result 167 states and 362 transitions. [2021-07-09 17:34:20,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:34:20,710 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:20,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:20,710 INFO L225 Difference]: With dead ends: 167 [2021-07-09 17:34:20,710 INFO L226 Difference]: Without dead ends: 167 [2021-07-09 17:34:20,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:20,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-09 17:34:20,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 151. [2021-07-09 17:34:20,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2) internal successors, (330), 150 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:20,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 330 transitions. [2021-07-09 17:34:20,712 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 330 transitions. Word has length 19 [2021-07-09 17:34:20,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:20,712 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 330 transitions. [2021-07-09 17:34:20,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:20,712 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 330 transitions. [2021-07-09 17:34:20,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:20,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:20,712 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:20,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2058 [2021-07-09 17:34:20,913 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:20,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:20,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2022497462, now seen corresponding path program 391 times [2021-07-09 17:34:20,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:20,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120063305] [2021-07-09 17:34:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:20,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:20,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120063305] [2021-07-09 17:34:20,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120063305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:20,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693097982] [2021-07-09 17:34:20,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:21,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:21,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:21,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:21,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:21,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:21,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:21,149 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-07-09 17:34:21,149 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:21,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:21,150 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-07-09 17:34:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:21,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693097982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:21,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:21,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:21,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803175846] [2021-07-09 17:34:21,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:21,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:21,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:21,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:21,167 INFO L87 Difference]: Start difference. First operand 151 states and 330 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:21,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:21,459 INFO L93 Difference]: Finished difference Result 189 states and 406 transitions. [2021-07-09 17:34:21,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:21,460 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:21,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:21,460 INFO L225 Difference]: With dead ends: 189 [2021-07-09 17:34:21,460 INFO L226 Difference]: Without dead ends: 189 [2021-07-09 17:34:21,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 348.2ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:34:21,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-07-09 17:34:21,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 152. [2021-07-09 17:34:21,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.198675496688742) internal successors, (332), 151 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:21,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 332 transitions. [2021-07-09 17:34:21,462 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 332 transitions. Word has length 19 [2021-07-09 17:34:21,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:21,462 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 332 transitions. [2021-07-09 17:34:21,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:21,462 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 332 transitions. [2021-07-09 17:34:21,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:21,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:21,462 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:21,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2059 [2021-07-09 17:34:21,663 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:21,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:21,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1027690778, now seen corresponding path program 392 times [2021-07-09 17:34:21,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:21,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241832212] [2021-07-09 17:34:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:21,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:21,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241832212] [2021-07-09 17:34:21,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241832212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:21,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808223972] [2021-07-09 17:34:21,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:21,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:21,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:21,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:21,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:21,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:21,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:21,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:21,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:21,939 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-07-09 17:34:21,939 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:21,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:21,940 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-07-09 17:34:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:21,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808223972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:21,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:21,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:21,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695026910] [2021-07-09 17:34:21,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:21,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:21,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:21,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:21,958 INFO L87 Difference]: Start difference. First operand 152 states and 332 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:22,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:22,384 INFO L93 Difference]: Finished difference Result 200 states and 426 transitions. [2021-07-09 17:34:22,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:34:22,384 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:22,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:22,384 INFO L225 Difference]: With dead ends: 200 [2021-07-09 17:34:22,385 INFO L226 Difference]: Without dead ends: 200 [2021-07-09 17:34:22,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 443.3ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:34:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-09 17:34:22,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 153. [2021-07-09 17:34:22,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1973684210526314) internal successors, (334), 152 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:22,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 334 transitions. [2021-07-09 17:34:22,386 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 334 transitions. Word has length 19 [2021-07-09 17:34:22,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:22,386 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 334 transitions. [2021-07-09 17:34:22,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:22,386 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 334 transitions. [2021-07-09 17:34:22,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:22,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:22,387 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:22,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2060,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:22,587 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:22,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:22,588 INFO L82 PathProgramCache]: Analyzing trace with hash 667774260, now seen corresponding path program 393 times [2021-07-09 17:34:22,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:22,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008392184] [2021-07-09 17:34:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:22,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:22,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008392184] [2021-07-09 17:34:22,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008392184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:22,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984544736] [2021-07-09 17:34:22,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:22,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:34:22,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:22,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:22,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:22,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:22,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:22,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:22,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:22,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:22,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:22,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:22,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:22,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:22,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:22,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:22,853 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:22,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:22,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:22,855 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:22,885 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:34:22,885 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:22,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:22,886 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:34:22,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:22,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984544736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:22,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:22,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:22,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948938101] [2021-07-09 17:34:22,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:22,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:22,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:22,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:22,925 INFO L87 Difference]: Start difference. First operand 153 states and 334 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:23,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:23,442 INFO L93 Difference]: Finished difference Result 199 states and 425 transitions. [2021-07-09 17:34:23,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:34:23,442 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:23,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:23,442 INFO L225 Difference]: With dead ends: 199 [2021-07-09 17:34:23,442 INFO L226 Difference]: Without dead ends: 199 [2021-07-09 17:34:23,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 537.8ms TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:34:23,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-09 17:34:23,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 154. [2021-07-09 17:34:23,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.196078431372549) internal successors, (336), 153 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 336 transitions. [2021-07-09 17:34:23,444 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 336 transitions. Word has length 19 [2021-07-09 17:34:23,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:23,444 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 336 transitions. [2021-07-09 17:34:23,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:23,444 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 336 transitions. [2021-07-09 17:34:23,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:23,444 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:23,445 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:23,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2061,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:23,645 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:23,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:23,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1377822030, now seen corresponding path program 394 times [2021-07-09 17:34:23,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:23,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949927781] [2021-07-09 17:34:23,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:23,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:23,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949927781] [2021-07-09 17:34:23,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949927781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:23,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369809855] [2021-07-09 17:34:23,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:23,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:23,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:23,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:23,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:23,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:23,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369809855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:23,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:23,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:23,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428300292] [2021-07-09 17:34:23,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:23,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:23,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:23,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:23,915 INFO L87 Difference]: Start difference. First operand 154 states and 336 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:24,255 INFO L93 Difference]: Finished difference Result 167 states and 363 transitions. [2021-07-09 17:34:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:24,256 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:24,256 INFO L225 Difference]: With dead ends: 167 [2021-07-09 17:34:24,256 INFO L226 Difference]: Without dead ends: 167 [2021-07-09 17:34:24,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 382.4ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:34:24,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-09 17:34:24,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2021-07-09 17:34:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.2013422818791946) internal successors, (328), 149 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:24,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 328 transitions. [2021-07-09 17:34:24,258 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 328 transitions. Word has length 19 [2021-07-09 17:34:24,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:24,258 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 328 transitions. [2021-07-09 17:34:24,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:24,258 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 328 transitions. [2021-07-09 17:34:24,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:24,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:24,258 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:24,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2071,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:24,459 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:24,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:24,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1032302878, now seen corresponding path program 395 times [2021-07-09 17:34:24,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:24,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129567399] [2021-07-09 17:34:24,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:24,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:24,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129567399] [2021-07-09 17:34:24,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129567399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:24,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555211385] [2021-07-09 17:34:24,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:24,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:34:24,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:24,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:24,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:24,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555211385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:24,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:24,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:24,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575455969] [2021-07-09 17:34:24,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:24,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:24,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:24,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:24,670 INFO L87 Difference]: Start difference. First operand 150 states and 328 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:24,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:24,859 INFO L93 Difference]: Finished difference Result 159 states and 340 transitions. [2021-07-09 17:34:24,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:34:24,860 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:24,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:24,860 INFO L225 Difference]: With dead ends: 159 [2021-07-09 17:34:24,860 INFO L226 Difference]: Without dead ends: 150 [2021-07-09 17:34:24,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:24,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-07-09 17:34:24,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-07-09 17:34:24,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.195945945945946) internal successors, (325), 148 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:24,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 325 transitions. [2021-07-09 17:34:24,862 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 325 transitions. Word has length 19 [2021-07-09 17:34:24,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:24,862 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 325 transitions. [2021-07-09 17:34:24,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:24,862 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 325 transitions. [2021-07-09 17:34:24,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:24,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:24,862 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:25,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2081,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:25,062 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:25,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:25,063 INFO L82 PathProgramCache]: Analyzing trace with hash 582526930, now seen corresponding path program 396 times [2021-07-09 17:34:25,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:25,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154930173] [2021-07-09 17:34:25,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:25,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:25,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154930173] [2021-07-09 17:34:25,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154930173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:25,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401022878] [2021-07-09 17:34:25,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:25,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:34:25,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:25,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:25,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:25,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:25,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:25,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:25,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:25,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:25,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:25,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:25,284 INFO L628 ElimStorePlain]: treesize reduction 40, result has 29.8 percent of original size [2021-07-09 17:34:25,285 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:25,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:25,285 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-07-09 17:34:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:25,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401022878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:25,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:25,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:25,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667267744] [2021-07-09 17:34:25,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:25,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:25,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:25,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:25,301 INFO L87 Difference]: Start difference. First operand 149 states and 325 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:25,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:25,468 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2021-07-09 17:34:25,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:25,468 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:25,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:25,468 INFO L225 Difference]: With dead ends: 177 [2021-07-09 17:34:25,468 INFO L226 Difference]: Without dead ends: 177 [2021-07-09 17:34:25,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:25,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-07-09 17:34:25,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 150. [2021-07-09 17:34:25,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1946308724832213) internal successors, (327), 149 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 327 transitions. [2021-07-09 17:34:25,470 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 327 transitions. Word has length 19 [2021-07-09 17:34:25,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:25,470 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 327 transitions. [2021-07-09 17:34:25,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:25,470 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 327 transitions. [2021-07-09 17:34:25,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:25,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:25,470 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:25,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2085 [2021-07-09 17:34:25,671 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:25,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:25,671 INFO L82 PathProgramCache]: Analyzing trace with hash -662252126, now seen corresponding path program 397 times [2021-07-09 17:34:25,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:25,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741119302] [2021-07-09 17:34:25,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:25,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:25,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741119302] [2021-07-09 17:34:25,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741119302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:25,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000948672] [2021-07-09 17:34:25,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:25,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:25,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:25,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:25,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:25,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:25,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:25,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:25,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:25,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:25,900 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-07-09 17:34:25,900 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:25,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:25,901 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-07-09 17:34:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:25,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000948672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:25,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:25,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:25,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146006304] [2021-07-09 17:34:25,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:25,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:25,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:25,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:25,917 INFO L87 Difference]: Start difference. First operand 150 states and 327 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:26,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:26,263 INFO L93 Difference]: Finished difference Result 193 states and 413 transitions. [2021-07-09 17:34:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:26,263 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:26,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:26,263 INFO L225 Difference]: With dead ends: 193 [2021-07-09 17:34:26,263 INFO L226 Difference]: Without dead ends: 193 [2021-07-09 17:34:26,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 386.0ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:34:26,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-07-09 17:34:26,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 151. [2021-07-09 17:34:26,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1933333333333334) internal successors, (329), 150 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:26,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 329 transitions. [2021-07-09 17:34:26,265 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 329 transitions. Word has length 19 [2021-07-09 17:34:26,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:26,265 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 329 transitions. [2021-07-09 17:34:26,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:26,265 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 329 transitions. [2021-07-09 17:34:26,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:26,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:26,265 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:26,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2086,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:26,466 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:26,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:26,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1022168644, now seen corresponding path program 398 times [2021-07-09 17:34:26,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:26,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387379517] [2021-07-09 17:34:26,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:26,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:26,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387379517] [2021-07-09 17:34:26,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387379517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:26,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793710367] [2021-07-09 17:34:26,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:26,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:26,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:26,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:26,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:26,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:26,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:26,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:26,670 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:26,673 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,713 INFO L628 ElimStorePlain]: treesize reduction 83, result has 31.4 percent of original size [2021-07-09 17:34:26,713 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:26,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:26,714 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-07-09 17:34:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:26,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793710367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:26,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:26,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:26,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643430769] [2021-07-09 17:34:26,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:26,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:26,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:26,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:26,754 INFO L87 Difference]: Start difference. First operand 151 states and 329 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:27,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:27,149 INFO L93 Difference]: Finished difference Result 204 states and 435 transitions. [2021-07-09 17:34:27,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:34:27,150 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:27,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:27,150 INFO L225 Difference]: With dead ends: 204 [2021-07-09 17:34:27,150 INFO L226 Difference]: Without dead ends: 204 [2021-07-09 17:34:27,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 406.2ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:34:27,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-07-09 17:34:27,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 152. [2021-07-09 17:34:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.19205298013245) internal successors, (331), 151 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:27,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 331 transitions. [2021-07-09 17:34:27,152 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 331 transitions. Word has length 19 [2021-07-09 17:34:27,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:27,152 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 331 transitions. [2021-07-09 17:34:27,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:27,152 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 331 transitions. [2021-07-09 17:34:27,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:27,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:27,152 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:27,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2087,399 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:27,353 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:27,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:27,353 INFO L82 PathProgramCache]: Analyzing trace with hash -312120874, now seen corresponding path program 399 times [2021-07-09 17:34:27,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:27,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981583508] [2021-07-09 17:34:27,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:27,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:27,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981583508] [2021-07-09 17:34:27,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981583508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:27,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913588538] [2021-07-09 17:34:27,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:27,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:34:27,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:27,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:27,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:27,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913588538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:27,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:27,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:27,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880855217] [2021-07-09 17:34:27,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:27,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:27,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:27,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:27,597 INFO L87 Difference]: Start difference. First operand 152 states and 331 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:27,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:27,899 INFO L93 Difference]: Finished difference Result 165 states and 358 transitions. [2021-07-09 17:34:27,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:34:27,899 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:27,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:27,899 INFO L225 Difference]: With dead ends: 165 [2021-07-09 17:34:27,899 INFO L226 Difference]: Without dead ends: 165 [2021-07-09 17:34:27,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 345.2ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:34:27,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-07-09 17:34:27,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2021-07-09 17:34:27,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.195945945945946) internal successors, (325), 148 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 325 transitions. [2021-07-09 17:34:27,901 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 325 transitions. Word has length 19 [2021-07-09 17:34:27,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:27,901 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 325 transitions. [2021-07-09 17:34:27,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:27,901 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 325 transitions. [2021-07-09 17:34:27,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:27,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:27,901 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:28,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2090 [2021-07-09 17:34:28,102 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:28,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:28,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1548050406, now seen corresponding path program 400 times [2021-07-09 17:34:28,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:28,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862172518] [2021-07-09 17:34:28,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:28,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:28,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862172518] [2021-07-09 17:34:28,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862172518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:28,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881104126] [2021-07-09 17:34:28,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:28,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:28,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:28,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:28,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:28,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:28,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:28,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,325 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:34:28,325 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:28,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,326 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:34:28,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:28,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881104126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:28,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:28,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:28,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583212580] [2021-07-09 17:34:28,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:28,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:28,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:28,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:28,340 INFO L87 Difference]: Start difference. First operand 149 states and 325 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:28,520 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2021-07-09 17:34:28,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:28,521 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:28,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:28,521 INFO L225 Difference]: With dead ends: 177 [2021-07-09 17:34:28,521 INFO L226 Difference]: Without dead ends: 177 [2021-07-09 17:34:28,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:34:28,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-07-09 17:34:28,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 150. [2021-07-09 17:34:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1946308724832213) internal successors, (327), 149 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:28,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 327 transitions. [2021-07-09 17:34:28,523 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 327 transitions. Word has length 19 [2021-07-09 17:34:28,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:28,523 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 327 transitions. [2021-07-09 17:34:28,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:28,523 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 327 transitions. [2021-07-09 17:34:28,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:28,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:28,523 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:28,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2100 [2021-07-09 17:34:28,724 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:28,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:28,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1907966924, now seen corresponding path program 401 times [2021-07-09 17:34:28,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:28,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886640719] [2021-07-09 17:34:28,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:28,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:28,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886640719] [2021-07-09 17:34:28,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886640719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:28,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340911897] [2021-07-09 17:34:28,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:28,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:34:28,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:28,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:28,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:28,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:28,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:28,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:28,938 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:28,941 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,971 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:34:28,971 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:28,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:28,972 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:34:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:28,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340911897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:28,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:28,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:28,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522380437] [2021-07-09 17:34:28,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:28,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:28,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:28,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:28,995 INFO L87 Difference]: Start difference. First operand 150 states and 327 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:29,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:29,202 INFO L93 Difference]: Finished difference Result 190 states and 408 transitions. [2021-07-09 17:34:29,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:34:29,202 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:29,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:29,202 INFO L225 Difference]: With dead ends: 190 [2021-07-09 17:34:29,203 INFO L226 Difference]: Without dead ends: 190 [2021-07-09 17:34:29,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 241.6ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:34:29,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-07-09 17:34:29,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 151. [2021-07-09 17:34:29,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1933333333333334) internal successors, (329), 150 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:29,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 329 transitions. [2021-07-09 17:34:29,204 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 329 transitions. Word has length 19 [2021-07-09 17:34:29,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:29,204 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 329 transitions. [2021-07-09 17:34:29,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:29,204 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 329 transitions. [2021-07-09 17:34:29,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:29,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:29,205 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:29,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2104 [2021-07-09 17:34:29,405 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:29,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:29,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1197919154, now seen corresponding path program 402 times [2021-07-09 17:34:29,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:29,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844880669] [2021-07-09 17:34:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:29,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:29,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844880669] [2021-07-09 17:34:29,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844880669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:29,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496550877] [2021-07-09 17:34:29,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:29,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:34:29,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:29,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:29,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:29,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496550877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:29,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:29,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:29,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227054021] [2021-07-09 17:34:29,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:29,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:29,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:29,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:29,639 INFO L87 Difference]: Start difference. First operand 151 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:29,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:29,865 INFO L93 Difference]: Finished difference Result 165 states and 358 transitions. [2021-07-09 17:34:29,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:29,865 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:29,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:29,865 INFO L225 Difference]: With dead ends: 165 [2021-07-09 17:34:29,865 INFO L226 Difference]: Without dead ends: 165 [2021-07-09 17:34:29,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:29,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-07-09 17:34:29,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2021-07-09 17:34:29,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.195945945945946) internal successors, (325), 148 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:29,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 325 transitions. [2021-07-09 17:34:29,867 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 325 transitions. Word has length 19 [2021-07-09 17:34:29,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:29,867 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 325 transitions. [2021-07-09 17:34:29,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:29,867 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 325 transitions. [2021-07-09 17:34:29,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:29,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:29,867 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:30,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2114,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:30,068 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:30,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:30,068 INFO L82 PathProgramCache]: Analyzing trace with hash -369852718, now seen corresponding path program 403 times [2021-07-09 17:34:30,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:30,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322464091] [2021-07-09 17:34:30,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:30,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:30,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322464091] [2021-07-09 17:34:30,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322464091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:30,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104695997] [2021-07-09 17:34:30,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:30,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:30,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:30,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:30,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:30,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,322 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:34:30,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:34:30,325 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:30,336 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:30,336 INFO L518 ElimStorePlain]: Eliminatee v_prenex_337 vanished before elimination [2021-07-09 17:34:30,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:30,337 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:34:30,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:30,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104695997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:30,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:30,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:30,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405219972] [2021-07-09 17:34:30,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:30,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:30,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:30,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:30,379 INFO L87 Difference]: Start difference. First operand 149 states and 325 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:30,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:30,600 INFO L93 Difference]: Finished difference Result 178 states and 375 transitions. [2021-07-09 17:34:30,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:30,600 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:30,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:30,600 INFO L225 Difference]: With dead ends: 178 [2021-07-09 17:34:30,600 INFO L226 Difference]: Without dead ends: 178 [2021-07-09 17:34:30,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:30,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-07-09 17:34:30,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 151. [2021-07-09 17:34:30,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2) internal successors, (330), 150 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:30,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 330 transitions. [2021-07-09 17:34:30,602 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 330 transitions. Word has length 19 [2021-07-09 17:34:30,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:30,602 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 330 transitions. [2021-07-09 17:34:30,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:30,602 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 330 transitions. [2021-07-09 17:34:30,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:30,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:30,602 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:30,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2124 [2021-07-09 17:34:30,803 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:30,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:30,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1242787972, now seen corresponding path program 404 times [2021-07-09 17:34:30,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:30,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768090861] [2021-07-09 17:34:30,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:30,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:30,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768090861] [2021-07-09 17:34:30,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768090861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:30,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405974523] [2021-07-09 17:34:30,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:30,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:30,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:30,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:30,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:31,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405974523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:31,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:31,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:31,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022526507] [2021-07-09 17:34:31,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:31,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:31,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:31,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:31,046 INFO L87 Difference]: Start difference. First operand 151 states and 330 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:31,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:31,193 INFO L93 Difference]: Finished difference Result 155 states and 334 transitions. [2021-07-09 17:34:31,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:31,193 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:31,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:31,193 INFO L225 Difference]: With dead ends: 155 [2021-07-09 17:34:31,193 INFO L226 Difference]: Without dead ends: 151 [2021-07-09 17:34:31,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:31,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-09 17:34:31,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-07-09 17:34:31,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1933333333333334) internal successors, (329), 150 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:31,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 329 transitions. [2021-07-09 17:34:31,195 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 329 transitions. Word has length 19 [2021-07-09 17:34:31,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:31,195 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 329 transitions. [2021-07-09 17:34:31,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:31,195 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 329 transitions. [2021-07-09 17:34:31,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:31,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:31,195 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:31,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2131,405 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:31,396 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:31,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:31,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1155906738, now seen corresponding path program 405 times [2021-07-09 17:34:31,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:31,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197878315] [2021-07-09 17:34:31,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:31,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:31,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197878315] [2021-07-09 17:34:31,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197878315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:31,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758478748] [2021-07-09 17:34:31,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:31,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:34:31,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:31,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:31,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:31,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758478748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:31,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:31,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:31,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470239984] [2021-07-09 17:34:31,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:31,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:31,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:31,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:31,636 INFO L87 Difference]: Start difference. First operand 151 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:31,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:31,754 INFO L93 Difference]: Finished difference Result 175 states and 377 transitions. [2021-07-09 17:34:31,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:31,754 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:31,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:31,754 INFO L225 Difference]: With dead ends: 175 [2021-07-09 17:34:31,755 INFO L226 Difference]: Without dead ends: 175 [2021-07-09 17:34:31,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 157.7ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:31,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-07-09 17:34:31,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 151. [2021-07-09 17:34:31,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1933333333333334) internal successors, (329), 150 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:31,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 329 transitions. [2021-07-09 17:34:31,756 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 329 transitions. Word has length 19 [2021-07-09 17:34:31,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:31,756 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 329 transitions. [2021-07-09 17:34:31,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:31,756 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 329 transitions. [2021-07-09 17:34:31,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:31,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:31,757 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:31,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2136 [2021-07-09 17:34:31,957 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:31,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:31,957 INFO L82 PathProgramCache]: Analyzing trace with hash -266095542, now seen corresponding path program 406 times [2021-07-09 17:34:31,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:31,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410447950] [2021-07-09 17:34:31,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:32,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:32,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410447950] [2021-07-09 17:34:32,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410447950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:32,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085892902] [2021-07-09 17:34:32,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:32,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:32,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:32,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:32,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:32,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:32,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:32,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:32,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:32,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:32,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:32,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:32,178 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-07-09 17:34:32,178 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:32,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:32,178 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-07-09 17:34:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:32,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085892902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:32,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:32,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:32,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805776348] [2021-07-09 17:34:32,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:32,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:32,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:32,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:32,194 INFO L87 Difference]: Start difference. First operand 151 states and 329 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:32,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:32,343 INFO L93 Difference]: Finished difference Result 178 states and 383 transitions. [2021-07-09 17:34:32,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:32,343 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:32,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:32,343 INFO L225 Difference]: With dead ends: 178 [2021-07-09 17:34:32,343 INFO L226 Difference]: Without dead ends: 178 [2021-07-09 17:34:32,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 185.0ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:32,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-07-09 17:34:32,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 151. [2021-07-09 17:34:32,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1933333333333334) internal successors, (329), 150 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:32,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 329 transitions. [2021-07-09 17:34:32,347 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 329 transitions. Word has length 19 [2021-07-09 17:34:32,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:32,347 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 329 transitions. [2021-07-09 17:34:32,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:32,347 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 329 transitions. [2021-07-09 17:34:32,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:32,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:32,347 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:32,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2140 [2021-07-09 17:34:32,561 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:32,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:32,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1510874598, now seen corresponding path program 407 times [2021-07-09 17:34:32,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:32,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505635797] [2021-07-09 17:34:32,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:32,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:32,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505635797] [2021-07-09 17:34:32,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505635797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:32,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515103494] [2021-07-09 17:34:32,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:32,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:34:32,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:32,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:32,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:32,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:32,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:32,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:32,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:32,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:32,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:32,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:32,787 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:34:32,787 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:32,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:32,788 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:34:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:32,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515103494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:32,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:32,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:32,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243070170] [2021-07-09 17:34:32,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:32,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:32,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:32,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:32,803 INFO L87 Difference]: Start difference. First operand 151 states and 329 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:33,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:33,121 INFO L93 Difference]: Finished difference Result 196 states and 419 transitions. [2021-07-09 17:34:33,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:33,121 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:33,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:33,122 INFO L225 Difference]: With dead ends: 196 [2021-07-09 17:34:33,122 INFO L226 Difference]: Without dead ends: 196 [2021-07-09 17:34:33,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 327.0ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:34:33,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-07-09 17:34:33,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 152. [2021-07-09 17:34:33,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.19205298013245) internal successors, (331), 151 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:33,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 331 transitions. [2021-07-09 17:34:33,123 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 331 transitions. Word has length 19 [2021-07-09 17:34:33,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:33,123 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 331 transitions. [2021-07-09 17:34:33,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:33,123 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 331 transitions. [2021-07-09 17:34:33,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:33,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:33,124 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:33,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2141,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:33,324 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:33,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:33,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1870791116, now seen corresponding path program 408 times [2021-07-09 17:34:33,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:33,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259997249] [2021-07-09 17:34:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:33,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:33,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259997249] [2021-07-09 17:34:33,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259997249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:33,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869571245] [2021-07-09 17:34:33,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:33,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:34:33,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:33,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:33,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:33,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:33,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:33,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:33,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:33,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:33,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:33,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:33,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:33,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:33,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:33,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:33,559 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:33,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:33,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:33,561 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:33,590 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:34:33,590 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:33,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:33,591 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:34:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:33,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869571245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:33,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:33,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:33,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361358268] [2021-07-09 17:34:33,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:33,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:33,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:33,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:33,625 INFO L87 Difference]: Start difference. First operand 152 states and 331 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:34,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:34,017 INFO L93 Difference]: Finished difference Result 205 states and 438 transitions. [2021-07-09 17:34:34,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:34:34,018 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:34,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:34,018 INFO L225 Difference]: With dead ends: 205 [2021-07-09 17:34:34,018 INFO L226 Difference]: Without dead ends: 205 [2021-07-09 17:34:34,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 419.3ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:34:34,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-09 17:34:34,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 153. [2021-07-09 17:34:34,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1907894736842106) internal successors, (333), 152 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:34,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 333 transitions. [2021-07-09 17:34:34,020 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 333 transitions. Word has length 19 [2021-07-09 17:34:34,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:34,020 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 333 transitions. [2021-07-09 17:34:34,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:34,020 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 333 transitions. [2021-07-09 17:34:34,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:34,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:34,020 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:34,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2145 [2021-07-09 17:34:34,221 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:34,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:34,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1160743346, now seen corresponding path program 409 times [2021-07-09 17:34:34,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:34,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855261948] [2021-07-09 17:34:34,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:34,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:34,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855261948] [2021-07-09 17:34:34,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855261948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:34,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163641389] [2021-07-09 17:34:34,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:34,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:34,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:34,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163641389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:34,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:34,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:34,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401663890] [2021-07-09 17:34:34,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:34,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:34,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:34,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:34,459 INFO L87 Difference]: Start difference. First operand 153 states and 333 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:34,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:34,784 INFO L93 Difference]: Finished difference Result 167 states and 362 transitions. [2021-07-09 17:34:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:34,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:34,785 INFO L225 Difference]: With dead ends: 167 [2021-07-09 17:34:34,785 INFO L226 Difference]: Without dead ends: 167 [2021-07-09 17:34:34,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 354.3ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:34:34,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-09 17:34:34,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2021-07-09 17:34:34,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1946308724832213) internal successors, (327), 149 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:34,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 327 transitions. [2021-07-09 17:34:34,787 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 327 transitions. Word has length 19 [2021-07-09 17:34:34,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:34,787 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 327 transitions. [2021-07-09 17:34:34,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:34,787 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 327 transitions. [2021-07-09 17:34:34,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:34,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:34,787 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:34,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2155 [2021-07-09 17:34:34,987 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:34,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:34,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1898294418, now seen corresponding path program 410 times [2021-07-09 17:34:34,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:34,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173798118] [2021-07-09 17:34:34,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:35,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:35,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173798118] [2021-07-09 17:34:35,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173798118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:35,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296651175] [2021-07-09 17:34:35,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:35,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:35,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:35,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:35,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:35,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:35,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:35,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:35,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:35,201 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-07-09 17:34:35,202 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:35,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:35,202 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-07-09 17:34:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:35,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296651175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:35,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:35,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:35,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76871076] [2021-07-09 17:34:35,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:35,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:35,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:35,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:35,217 INFO L87 Difference]: Start difference. First operand 150 states and 327 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:35,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:35,367 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2021-07-09 17:34:35,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:35,368 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:35,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:35,368 INFO L225 Difference]: With dead ends: 180 [2021-07-09 17:34:35,368 INFO L226 Difference]: Without dead ends: 180 [2021-07-09 17:34:35,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:34:35,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-07-09 17:34:35,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 152. [2021-07-09 17:34:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.19205298013245) internal successors, (331), 151 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:35,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 331 transitions. [2021-07-09 17:34:35,370 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 331 transitions. Word has length 19 [2021-07-09 17:34:35,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:35,370 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 331 transitions. [2021-07-09 17:34:35,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:35,370 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 331 transitions. [2021-07-09 17:34:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:35,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:35,370 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:35,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2165,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:35,571 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:35,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:35,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1538377900, now seen corresponding path program 411 times [2021-07-09 17:34:35,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:35,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460614191] [2021-07-09 17:34:35,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:35,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:35,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460614191] [2021-07-09 17:34:35,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460614191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:35,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832002209] [2021-07-09 17:34:35,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:35,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:34:35,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:35,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:35,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:35,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:35,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:35,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:35,776 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:35,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:35,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:35,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:35,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:35,781 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:35,810 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:34:35,811 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:35,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:35,811 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:34:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:35,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832002209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:35,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:35,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:35,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125268144] [2021-07-09 17:34:35,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:35,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:35,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:35,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:35,844 INFO L87 Difference]: Start difference. First operand 152 states and 331 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:36,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:36,147 INFO L93 Difference]: Finished difference Result 199 states and 426 transitions. [2021-07-09 17:34:36,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:36,147 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:36,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:36,147 INFO L225 Difference]: With dead ends: 199 [2021-07-09 17:34:36,147 INFO L226 Difference]: Without dead ends: 199 [2021-07-09 17:34:36,147 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 309.4ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:34:36,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-09 17:34:36,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 153. [2021-07-09 17:34:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1907894736842106) internal successors, (333), 152 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 333 transitions. [2021-07-09 17:34:36,149 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 333 transitions. Word has length 19 [2021-07-09 17:34:36,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:36,149 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 333 transitions. [2021-07-09 17:34:36,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:36,149 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 333 transitions. [2021-07-09 17:34:36,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:36,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:36,149 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:36,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2166 [2021-07-09 17:34:36,350 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:36,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:36,350 INFO L82 PathProgramCache]: Analyzing trace with hash -2046541626, now seen corresponding path program 412 times [2021-07-09 17:34:36,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:36,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341557028] [2021-07-09 17:34:36,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:36,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:36,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341557028] [2021-07-09 17:34:36,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341557028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:36,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250593508] [2021-07-09 17:34:36,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:36,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:36,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:36,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:36,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:36,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250593508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:36,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:36,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:36,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063270848] [2021-07-09 17:34:36,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:36,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:36,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:36,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:36,570 INFO L87 Difference]: Start difference. First operand 153 states and 333 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:36,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:36,791 INFO L93 Difference]: Finished difference Result 166 states and 360 transitions. [2021-07-09 17:34:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:34:36,792 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:36,792 INFO L225 Difference]: With dead ends: 166 [2021-07-09 17:34:36,792 INFO L226 Difference]: Without dead ends: 166 [2021-07-09 17:34:36,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:34:36,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-09 17:34:36,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 151. [2021-07-09 17:34:36,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1933333333333334) internal successors, (329), 150 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:36,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 329 transitions. [2021-07-09 17:34:36,794 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 329 transitions. Word has length 19 [2021-07-09 17:34:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:36,794 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 329 transitions. [2021-07-09 17:34:36,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 329 transitions. [2021-07-09 17:34:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:36,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:36,794 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:36,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2176,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:36,994 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:36,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:36,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1218475190, now seen corresponding path program 413 times [2021-07-09 17:34:36,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:36,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873402619] [2021-07-09 17:34:36,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:37,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:37,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873402619] [2021-07-09 17:34:37,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873402619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:37,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136679553] [2021-07-09 17:34:37,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:37,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:34:37,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:37,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:37,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:37,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:37,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:37,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:37,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:37,250 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:34:37,251 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:37,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:34:37,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:37,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:37,264 INFO L518 ElimStorePlain]: Eliminatee v_prenex_341 vanished before elimination [2021-07-09 17:34:37,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:37,265 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:34:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:37,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136679553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:37,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:37,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:37,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885417358] [2021-07-09 17:34:37,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:37,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:37,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:37,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:37,302 INFO L87 Difference]: Start difference. First operand 151 states and 329 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:37,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:37,568 INFO L93 Difference]: Finished difference Result 180 states and 379 transitions. [2021-07-09 17:34:37,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:37,568 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:37,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:37,569 INFO L225 Difference]: With dead ends: 180 [2021-07-09 17:34:37,569 INFO L226 Difference]: Without dead ends: 180 [2021-07-09 17:34:37,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 248.9ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:37,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-07-09 17:34:37,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 153. [2021-07-09 17:34:37,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1973684210526314) internal successors, (334), 152 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:37,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 334 transitions. [2021-07-09 17:34:37,571 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 334 transitions. Word has length 19 [2021-07-09 17:34:37,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:37,571 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 334 transitions. [2021-07-09 17:34:37,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:37,571 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 334 transitions. [2021-07-09 17:34:37,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:37,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:37,571 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:37,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2186,414 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:37,771 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:37,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:37,772 INFO L82 PathProgramCache]: Analyzing trace with hash 791710520, now seen corresponding path program 414 times [2021-07-09 17:34:37,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:37,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324368538] [2021-07-09 17:34:37,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:37,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:37,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324368538] [2021-07-09 17:34:37,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324368538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:37,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845015152] [2021-07-09 17:34:37,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:37,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:34:37,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:37,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:37,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:37,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:37,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:37,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:37,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:38,033 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-07-09 17:34:38,033 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:38,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:38,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:38,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:38,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:38,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:38,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:34:38,053 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:38,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:38,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:38,069 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:34:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:38,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845015152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:38,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:38,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:38,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785611821] [2021-07-09 17:34:38,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:38,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:38,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:38,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:38,107 INFO L87 Difference]: Start difference. First operand 153 states and 334 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:38,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:38,314 INFO L93 Difference]: Finished difference Result 223 states and 465 transitions. [2021-07-09 17:34:38,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:34:38,315 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:38,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:38,315 INFO L225 Difference]: With dead ends: 223 [2021-07-09 17:34:38,315 INFO L226 Difference]: Without dead ends: 223 [2021-07-09 17:34:38,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 203.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:38,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-07-09 17:34:38,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 154. [2021-07-09 17:34:38,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.215686274509804) internal successors, (339), 153 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 339 transitions. [2021-07-09 17:34:38,317 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 339 transitions. Word has length 19 [2021-07-09 17:34:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:38,317 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 339 transitions. [2021-07-09 17:34:38,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:38,317 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 339 transitions. [2021-07-09 17:34:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:38,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:38,317 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:38,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2193,415 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:38,518 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:38,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:38,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2091410444, now seen corresponding path program 415 times [2021-07-09 17:34:38,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:38,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117784282] [2021-07-09 17:34:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:38,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:38,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117784282] [2021-07-09 17:34:38,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117784282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:38,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241085094] [2021-07-09 17:34:38,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:38,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:38,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:38,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241085094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:38,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:38,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:38,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952871008] [2021-07-09 17:34:38,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:38,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:38,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:38,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:38,748 INFO L87 Difference]: Start difference. First operand 154 states and 339 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:38,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:38,966 INFO L93 Difference]: Finished difference Result 158 states and 343 transitions. [2021-07-09 17:34:38,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:34:38,966 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:38,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:38,966 INFO L225 Difference]: With dead ends: 158 [2021-07-09 17:34:38,966 INFO L226 Difference]: Without dead ends: 154 [2021-07-09 17:34:38,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 251.6ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:34:38,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-09 17:34:38,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-07-09 17:34:38,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2091503267973858) internal successors, (338), 153 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 338 transitions. [2021-07-09 17:34:38,968 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 338 transitions. Word has length 19 [2021-07-09 17:34:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:38,968 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 338 transitions. [2021-07-09 17:34:38,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:38,968 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 338 transitions. [2021-07-09 17:34:38,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:38,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:38,968 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:39,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2197,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:39,169 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:39,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:39,169 INFO L82 PathProgramCache]: Analyzing trace with hash -2004529210, now seen corresponding path program 416 times [2021-07-09 17:34:39,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:39,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297139163] [2021-07-09 17:34:39,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:39,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:39,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297139163] [2021-07-09 17:34:39,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297139163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:39,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119997605] [2021-07-09 17:34:39,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:39,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:39,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:39,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:39,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:39,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:39,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:39,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:39,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:39,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:39,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,392 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:34:39,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:39,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:34:39,394 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:39,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:39,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,400 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:34:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:39,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119997605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:39,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:39,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:39,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756494219] [2021-07-09 17:34:39,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:39,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:39,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:39,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:39,418 INFO L87 Difference]: Start difference. First operand 154 states and 338 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:39,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:39,526 INFO L93 Difference]: Finished difference Result 176 states and 379 transitions. [2021-07-09 17:34:39,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:39,526 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:39,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:39,526 INFO L225 Difference]: With dead ends: 176 [2021-07-09 17:34:39,526 INFO L226 Difference]: Without dead ends: 176 [2021-07-09 17:34:39,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 152.7ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:39,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-07-09 17:34:39,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 149. [2021-07-09 17:34:39,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.195945945945946) internal successors, (325), 148 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:39,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 325 transitions. [2021-07-09 17:34:39,528 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 325 transitions. Word has length 19 [2021-07-09 17:34:39,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:39,528 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 325 transitions. [2021-07-09 17:34:39,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:39,528 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 325 transitions. [2021-07-09 17:34:39,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:39,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:39,528 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:39,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2202 [2021-07-09 17:34:39,744 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:39,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:39,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1439707570, now seen corresponding path program 417 times [2021-07-09 17:34:39,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:39,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859230957] [2021-07-09 17:34:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:39,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:39,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859230957] [2021-07-09 17:34:39,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859230957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:39,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603012616] [2021-07-09 17:34:39,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:39,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:34:39,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:39,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:39,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:39,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603012616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:39,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:39,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:39,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105252980] [2021-07-09 17:34:39,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:39,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:39,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:39,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:39,967 INFO L87 Difference]: Start difference. First operand 149 states and 325 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:40,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:40,150 INFO L93 Difference]: Finished difference Result 156 states and 334 transitions. [2021-07-09 17:34:40,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:40,150 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:40,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:40,150 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:34:40,150 INFO L226 Difference]: Without dead ends: 150 [2021-07-09 17:34:40,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 219.3ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:34:40,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-07-09 17:34:40,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-07-09 17:34:40,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.189189189189189) internal successors, (324), 148 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:40,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 324 transitions. [2021-07-09 17:34:40,152 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 324 transitions. Word has length 19 [2021-07-09 17:34:40,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:40,152 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 324 transitions. [2021-07-09 17:34:40,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:40,152 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 324 transitions. [2021-07-09 17:34:40,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:40,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:40,152 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:40,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2204,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:40,353 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:40,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:40,353 INFO L82 PathProgramCache]: Analyzing trace with hash 208351514, now seen corresponding path program 418 times [2021-07-09 17:34:40,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:40,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433099069] [2021-07-09 17:34:40,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:40,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:40,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433099069] [2021-07-09 17:34:40,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433099069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:40,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433835548] [2021-07-09 17:34:40,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:40,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:40,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:40,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:40,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:40,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:40,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:40,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:40,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:40,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:40,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:40,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:40,578 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:34:40,578 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:40,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:40,578 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:34:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:40,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433835548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:40,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:40,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:40,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978947713] [2021-07-09 17:34:40,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:40,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:40,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:40,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:40,582 INFO L87 Difference]: Start difference. First operand 149 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:40,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:40,717 INFO L93 Difference]: Finished difference Result 186 states and 398 transitions. [2021-07-09 17:34:40,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:34:40,717 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:40,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:40,718 INFO L225 Difference]: With dead ends: 186 [2021-07-09 17:34:40,718 INFO L226 Difference]: Without dead ends: 186 [2021-07-09 17:34:40,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:34:40,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-07-09 17:34:40,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 149. [2021-07-09 17:34:40,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.189189189189189) internal successors, (324), 148 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:40,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 324 transitions. [2021-07-09 17:34:40,720 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 324 transitions. Word has length 19 [2021-07-09 17:34:40,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:40,720 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 324 transitions. [2021-07-09 17:34:40,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:40,720 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 324 transitions. [2021-07-09 17:34:40,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:40,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:40,720 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:40,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2208 [2021-07-09 17:34:40,920 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:40,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:40,921 INFO L82 PathProgramCache]: Analyzing trace with hash -801633974, now seen corresponding path program 419 times [2021-07-09 17:34:40,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:40,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134005668] [2021-07-09 17:34:40,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:40,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:40,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134005668] [2021-07-09 17:34:40,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134005668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:40,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232795369] [2021-07-09 17:34:40,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:41,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:34:41,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:41,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:41,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:41,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:41,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:41,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:41,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:41,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:41,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:41,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:41,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:41,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:41,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:41,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:41,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:41,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:41,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:41,146 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:41,175 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:34:41,175 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:41,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:41,176 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:34:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:41,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232795369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:41,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:41,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:41,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279127230] [2021-07-09 17:34:41,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:41,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:41,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:41,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:41,201 INFO L87 Difference]: Start difference. First operand 149 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:41,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:41,367 INFO L93 Difference]: Finished difference Result 200 states and 426 transitions. [2021-07-09 17:34:41,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:34:41,367 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:41,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:41,368 INFO L225 Difference]: With dead ends: 200 [2021-07-09 17:34:41,368 INFO L226 Difference]: Without dead ends: 200 [2021-07-09 17:34:41,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 203.5ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:34:41,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-09 17:34:41,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 150. [2021-07-09 17:34:41,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1879194630872485) internal successors, (326), 149 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:41,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 326 transitions. [2021-07-09 17:34:41,370 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 326 transitions. Word has length 19 [2021-07-09 17:34:41,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:41,370 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 326 transitions. [2021-07-09 17:34:41,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:41,370 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 326 transitions. [2021-07-09 17:34:41,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:41,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:41,370 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:41,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2212 [2021-07-09 17:34:41,570 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:41,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:41,571 INFO L82 PathProgramCache]: Analyzing trace with hash 558482766, now seen corresponding path program 420 times [2021-07-09 17:34:41,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:41,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96904978] [2021-07-09 17:34:41,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:41,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:41,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96904978] [2021-07-09 17:34:41,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96904978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:41,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289191135] [2021-07-09 17:34:41,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:41,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:34:41,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:41,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:41,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:41,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:41,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289191135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:41,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:41,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:41,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556965923] [2021-07-09 17:34:41,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:41,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:41,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:41,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:41,796 INFO L87 Difference]: Start difference. First operand 150 states and 326 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:41,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:41,996 INFO L93 Difference]: Finished difference Result 167 states and 361 transitions. [2021-07-09 17:34:41,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:41,996 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:41,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:41,996 INFO L225 Difference]: With dead ends: 167 [2021-07-09 17:34:41,996 INFO L226 Difference]: Without dead ends: 167 [2021-07-09 17:34:41,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:34:41,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-09 17:34:41,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 148. [2021-07-09 17:34:41,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1904761904761907) internal successors, (322), 147 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:41,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 322 transitions. [2021-07-09 17:34:41,998 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 322 transitions. Word has length 19 [2021-07-09 17:34:41,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:41,998 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 322 transitions. [2021-07-09 17:34:41,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:41,998 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 322 transitions. [2021-07-09 17:34:41,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:41,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:41,998 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:42,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2222 [2021-07-09 17:34:42,199 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:42,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:42,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1386549202, now seen corresponding path program 421 times [2021-07-09 17:34:42,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:42,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799250912] [2021-07-09 17:34:42,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:42,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:42,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799250912] [2021-07-09 17:34:42,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799250912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:42,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422091056] [2021-07-09 17:34:42,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:42,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:42,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:42,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:42,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:42,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:42,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:42,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:42,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:42,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:42,470 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:34:42,470 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:42,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:34:42,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:42,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:42,483 INFO L518 ElimStorePlain]: Eliminatee v_prenex_347 vanished before elimination [2021-07-09 17:34:42,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:42,484 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:34:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:42,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422091056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:42,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:42,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:42,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934502372] [2021-07-09 17:34:42,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:42,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:42,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:42,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:42,521 INFO L87 Difference]: Start difference. First operand 148 states and 322 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:42,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:42,851 INFO L93 Difference]: Finished difference Result 181 states and 380 transitions. [2021-07-09 17:34:42,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:42,851 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:42,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:42,851 INFO L225 Difference]: With dead ends: 181 [2021-07-09 17:34:42,851 INFO L226 Difference]: Without dead ends: 181 [2021-07-09 17:34:42,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 346.2ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:42,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-07-09 17:34:42,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 150. [2021-07-09 17:34:42,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1946308724832213) internal successors, (327), 149 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:42,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 327 transitions. [2021-07-09 17:34:42,853 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 327 transitions. Word has length 19 [2021-07-09 17:34:42,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:42,853 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 327 transitions. [2021-07-09 17:34:42,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:42,853 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 327 transitions. [2021-07-09 17:34:42,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:42,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:42,853 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:43,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 422 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2232 [2021-07-09 17:34:43,054 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:43,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:43,054 INFO L82 PathProgramCache]: Analyzing trace with hash -898232384, now seen corresponding path program 422 times [2021-07-09 17:34:43,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:43,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453085515] [2021-07-09 17:34:43,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:43,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:43,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:43,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453085515] [2021-07-09 17:34:43,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453085515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:43,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277663842] [2021-07-09 17:34:43,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:43,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:43,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:43,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:43,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:43,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:43,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:43,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:43,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:43,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:43,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:43,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:43,310 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-07-09 17:34:43,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:43,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:43,313 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:43,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:43,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:43,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:34:43,330 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:43,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:43,344 INFO L518 ElimStorePlain]: Eliminatee v_prenex_350 vanished before elimination [2021-07-09 17:34:43,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:43,345 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:34:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:43,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277663842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:43,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:43,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:43,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087643776] [2021-07-09 17:34:43,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:43,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:43,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:43,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:43,384 INFO L87 Difference]: Start difference. First operand 150 states and 327 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:43,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:43,693 INFO L93 Difference]: Finished difference Result 227 states and 472 transitions. [2021-07-09 17:34:43,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:34:43,694 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:43,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:43,694 INFO L225 Difference]: With dead ends: 227 [2021-07-09 17:34:43,694 INFO L226 Difference]: Without dead ends: 227 [2021-07-09 17:34:43,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 315.5ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:43,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-09 17:34:43,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 151. [2021-07-09 17:34:43,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2133333333333334) internal successors, (332), 150 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:43,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 332 transitions. [2021-07-09 17:34:43,696 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 332 transitions. Word has length 19 [2021-07-09 17:34:43,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:43,696 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 332 transitions. [2021-07-09 17:34:43,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:43,696 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 332 transitions. [2021-07-09 17:34:43,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:43,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:43,696 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:43,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2239 [2021-07-09 17:34:43,905 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:43,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:43,905 INFO L82 PathProgramCache]: Analyzing trace with hash 513613948, now seen corresponding path program 423 times [2021-07-09 17:34:43,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:43,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563703348] [2021-07-09 17:34:43,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:43,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:43,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563703348] [2021-07-09 17:34:43,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563703348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:43,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423181046] [2021-07-09 17:34:43,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:44,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:34:44,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:44,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:44,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:44,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423181046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:44,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:44,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:44,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929167326] [2021-07-09 17:34:44,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:44,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:44,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:44,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:44,143 INFO L87 Difference]: Start difference. First operand 151 states and 332 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:44,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:44,432 INFO L93 Difference]: Finished difference Result 156 states and 338 transitions. [2021-07-09 17:34:44,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:44,432 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:44,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:44,432 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:34:44,432 INFO L226 Difference]: Without dead ends: 152 [2021-07-09 17:34:44,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:34:44,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-07-09 17:34:44,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-07-09 17:34:44,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2066666666666666) internal successors, (331), 150 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:44,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 331 transitions. [2021-07-09 17:34:44,434 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 331 transitions. Word has length 19 [2021-07-09 17:34:44,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:44,434 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 331 transitions. [2021-07-09 17:34:44,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:44,434 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 331 transitions. [2021-07-09 17:34:44,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:44,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:44,434 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:44,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 424 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2243 [2021-07-09 17:34:44,635 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:44,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:44,635 INFO L82 PathProgramCache]: Analyzing trace with hash 600495182, now seen corresponding path program 424 times [2021-07-09 17:34:44,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:44,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501068023] [2021-07-09 17:34:44,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:44,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:44,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:44,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501068023] [2021-07-09 17:34:44,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501068023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:44,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070910864] [2021-07-09 17:34:44,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:44,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:44,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:44,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:44,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:44,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:44,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:44,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:44,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:44,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:44,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:44,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:44,859 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:34:44,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:44,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:34:44,862 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:44,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:44,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:44,868 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:34:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:44,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070910864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:44,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:44,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:44,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089972472] [2021-07-09 17:34:44,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:44,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:44,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:44,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:44,885 INFO L87 Difference]: Start difference. First operand 151 states and 331 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:45,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:45,072 INFO L93 Difference]: Finished difference Result 176 states and 380 transitions. [2021-07-09 17:34:45,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:45,072 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:45,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:45,073 INFO L225 Difference]: With dead ends: 176 [2021-07-09 17:34:45,073 INFO L226 Difference]: Without dead ends: 176 [2021-07-09 17:34:45,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:45,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-07-09 17:34:45,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 147. [2021-07-09 17:34:45,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.191780821917808) internal successors, (320), 146 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 320 transitions. [2021-07-09 17:34:45,074 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 320 transitions. Word has length 19 [2021-07-09 17:34:45,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:45,075 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 320 transitions. [2021-07-09 17:34:45,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:45,075 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 320 transitions. [2021-07-09 17:34:45,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:45,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:45,075 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:45,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2248 [2021-07-09 17:34:45,276 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:45,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:45,276 INFO L82 PathProgramCache]: Analyzing trace with hash 724682390, now seen corresponding path program 425 times [2021-07-09 17:34:45,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:45,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097195621] [2021-07-09 17:34:45,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:45,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:45,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097195621] [2021-07-09 17:34:45,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097195621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:45,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335985646] [2021-07-09 17:34:45,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:45,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:34:45,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:45,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:45,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:45,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335985646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:45,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:45,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:45,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624374084] [2021-07-09 17:34:45,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:45,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:45,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:45,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:45,565 INFO L87 Difference]: Start difference. First operand 147 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:45,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:45,942 INFO L93 Difference]: Finished difference Result 205 states and 427 transitions. [2021-07-09 17:34:45,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:34:45,942 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:45,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:45,943 INFO L225 Difference]: With dead ends: 205 [2021-07-09 17:34:45,943 INFO L226 Difference]: Without dead ends: 202 [2021-07-09 17:34:45,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 348.4ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:45,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-09 17:34:45,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 156. [2021-07-09 17:34:45,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.2193548387096773) internal successors, (344), 155 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:45,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 344 transitions. [2021-07-09 17:34:45,945 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 344 transitions. Word has length 19 [2021-07-09 17:34:45,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:45,945 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 344 transitions. [2021-07-09 17:34:45,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:45,945 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 344 transitions. [2021-07-09 17:34:45,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:45,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:45,945 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:46,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2250,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:46,145 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:46,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:46,146 INFO L82 PathProgramCache]: Analyzing trace with hash 500750922, now seen corresponding path program 426 times [2021-07-09 17:34:46,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:46,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160219600] [2021-07-09 17:34:46,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:46,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:46,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160219600] [2021-07-09 17:34:46,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160219600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:46,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773482928] [2021-07-09 17:34:46,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:46,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:34:46,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:46,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:46,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:46,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:46,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:46,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:46,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:46,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:46,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:46,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:46,444 INFO L628 ElimStorePlain]: treesize reduction 82, result has 36.4 percent of original size [2021-07-09 17:34:46,444 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:46,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:34:46,447 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:46,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:46,461 INFO L518 ElimStorePlain]: Eliminatee v_prenex_355 vanished before elimination [2021-07-09 17:34:46,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:46,461 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-07-09 17:34:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:46,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773482928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:46,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:46,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:46,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131833476] [2021-07-09 17:34:46,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:46,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:46,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:46,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:46,505 INFO L87 Difference]: Start difference. First operand 156 states and 344 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:46,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:46,756 INFO L93 Difference]: Finished difference Result 189 states and 400 transitions. [2021-07-09 17:34:46,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:34:46,756 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:46,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:46,756 INFO L225 Difference]: With dead ends: 189 [2021-07-09 17:34:46,756 INFO L226 Difference]: Without dead ends: 189 [2021-07-09 17:34:46,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 261.7ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:46,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-07-09 17:34:46,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 156. [2021-07-09 17:34:46,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.2193548387096773) internal successors, (344), 155 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:46,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 344 transitions. [2021-07-09 17:34:46,758 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 344 transitions. Word has length 19 [2021-07-09 17:34:46,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:46,758 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 344 transitions. [2021-07-09 17:34:46,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:46,758 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 344 transitions. [2021-07-09 17:34:46,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:46,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:46,759 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:46,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2261,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:46,959 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:46,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:46,959 INFO L82 PathProgramCache]: Analyzing trace with hash -910039910, now seen corresponding path program 427 times [2021-07-09 17:34:46,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:46,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280948008] [2021-07-09 17:34:46,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:47,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:47,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280948008] [2021-07-09 17:34:47,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280948008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:47,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181164239] [2021-07-09 17:34:47,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:47,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:47,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:47,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:47,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:47,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:47,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:47,259 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:34:47,259 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:47,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:34:47,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:47,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:47,273 INFO L518 ElimStorePlain]: Eliminatee v_prenex_358 vanished before elimination [2021-07-09 17:34:47,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:47,274 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:34:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:47,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181164239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:47,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:47,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:47,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563943369] [2021-07-09 17:34:47,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:47,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:47,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:47,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:47,301 INFO L87 Difference]: Start difference. First operand 156 states and 344 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:47,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:47,771 INFO L93 Difference]: Finished difference Result 187 states and 393 transitions. [2021-07-09 17:34:47,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:34:47,771 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:47,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:47,772 INFO L225 Difference]: With dead ends: 187 [2021-07-09 17:34:47,772 INFO L226 Difference]: Without dead ends: 185 [2021-07-09 17:34:47,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 460.0ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:47,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-07-09 17:34:47,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 156. [2021-07-09 17:34:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.2129032258064516) internal successors, (343), 155 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 343 transitions. [2021-07-09 17:34:47,774 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 343 transitions. Word has length 19 [2021-07-09 17:34:47,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:47,774 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 343 transitions. [2021-07-09 17:34:47,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:47,774 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 343 transitions. [2021-07-09 17:34:47,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:47,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:47,774 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:47,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2267,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:47,974 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:47,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:47,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1860867662, now seen corresponding path program 428 times [2021-07-09 17:34:47,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:47,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54064084] [2021-07-09 17:34:47,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:48,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:48,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54064084] [2021-07-09 17:34:48,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54064084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:48,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796189246] [2021-07-09 17:34:48,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:48,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:48,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:48,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:48,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:48,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:48,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:48,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:48,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:48,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:48,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:48,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:48,244 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-07-09 17:34:48,244 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:48,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:48,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:48,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:48,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:48,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:48,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:34:48,265 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:48,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:48,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:48,280 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:34:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:48,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796189246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:48,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:48,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:48,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891400178] [2021-07-09 17:34:48,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:48,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:48,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:48,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:48,320 INFO L87 Difference]: Start difference. First operand 156 states and 343 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:48,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:48,760 INFO L93 Difference]: Finished difference Result 221 states and 459 transitions. [2021-07-09 17:34:48,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:34:48,761 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:48,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:48,761 INFO L225 Difference]: With dead ends: 221 [2021-07-09 17:34:48,761 INFO L226 Difference]: Without dead ends: 221 [2021-07-09 17:34:48,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 363.7ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:48,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-07-09 17:34:48,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 155. [2021-07-09 17:34:48,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2142857142857144) internal successors, (341), 154 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:48,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 341 transitions. [2021-07-09 17:34:48,763 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 341 transitions. Word has length 19 [2021-07-09 17:34:48,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:48,763 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 341 transitions. [2021-07-09 17:34:48,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:48,763 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 341 transitions. [2021-07-09 17:34:48,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:48,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:48,763 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:48,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2275,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:48,963 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:48,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:48,964 INFO L82 PathProgramCache]: Analyzing trace with hash -372184332, now seen corresponding path program 429 times [2021-07-09 17:34:48,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:48,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679392100] [2021-07-09 17:34:48,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:49,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:49,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679392100] [2021-07-09 17:34:49,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679392100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:49,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311478662] [2021-07-09 17:34:49,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:49,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:34:49,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:49,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:49,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:49,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311478662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:49,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:49,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:49,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257347259] [2021-07-09 17:34:49,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:49,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:49,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:49,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:49,249 INFO L87 Difference]: Start difference. First operand 155 states and 341 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:49,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:49,616 INFO L93 Difference]: Finished difference Result 163 states and 351 transitions. [2021-07-09 17:34:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:49,616 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:49,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:49,616 INFO L225 Difference]: With dead ends: 163 [2021-07-09 17:34:49,616 INFO L226 Difference]: Without dead ends: 159 [2021-07-09 17:34:49,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 392.0ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:34:49,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-07-09 17:34:49,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2021-07-09 17:34:49,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.207792207792208) internal successors, (340), 154 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 340 transitions. [2021-07-09 17:34:49,618 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 340 transitions. Word has length 19 [2021-07-09 17:34:49,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:49,618 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 340 transitions. [2021-07-09 17:34:49,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:49,618 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 340 transitions. [2021-07-09 17:34:49,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:49,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:49,618 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:49,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2279 [2021-07-09 17:34:49,819 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:49,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:49,819 INFO L82 PathProgramCache]: Analyzing trace with hash -285303098, now seen corresponding path program 430 times [2021-07-09 17:34:49,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:49,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913313547] [2021-07-09 17:34:49,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:49,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:49,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913313547] [2021-07-09 17:34:49,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913313547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:49,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631855388] [2021-07-09 17:34:49,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:49,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:49,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:49,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:49,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:50,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:50,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:50,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:50,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:50,067 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:34:50,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:50,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:34:50,070 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:50,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:50,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:50,076 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:34:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:50,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631855388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:50,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:50,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:50,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614246316] [2021-07-09 17:34:50,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:50,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:50,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:50,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:50,094 INFO L87 Difference]: Start difference. First operand 155 states and 340 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:50,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:50,446 INFO L93 Difference]: Finished difference Result 193 states and 409 transitions. [2021-07-09 17:34:50,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:50,447 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:50,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:50,447 INFO L225 Difference]: With dead ends: 193 [2021-07-09 17:34:50,447 INFO L226 Difference]: Without dead ends: 193 [2021-07-09 17:34:50,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 352.9ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:34:50,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-07-09 17:34:50,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 154. [2021-07-09 17:34:50,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2091503267973858) internal successors, (338), 153 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:50,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 338 transitions. [2021-07-09 17:34:50,454 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 338 transitions. Word has length 19 [2021-07-09 17:34:50,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:50,454 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 338 transitions. [2021-07-09 17:34:50,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:50,454 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 338 transitions. [2021-07-09 17:34:50,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:50,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:50,455 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:50,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2284 [2021-07-09 17:34:50,655 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:50,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:50,655 INFO L82 PathProgramCache]: Analyzing trace with hash -878530598, now seen corresponding path program 431 times [2021-07-09 17:34:50,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:50,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123023316] [2021-07-09 17:34:50,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:50,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:50,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123023316] [2021-07-09 17:34:50,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123023316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:50,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797872845] [2021-07-09 17:34:50,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:50,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:34:50,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:50,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:50,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:50,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797872845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:50,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:50,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:50,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592230585] [2021-07-09 17:34:50,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:50,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:50,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:50,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:50,895 INFO L87 Difference]: Start difference. First operand 154 states and 338 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:51,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:51,157 INFO L93 Difference]: Finished difference Result 160 states and 345 transitions. [2021-07-09 17:34:51,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:51,158 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:51,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:51,158 INFO L225 Difference]: With dead ends: 160 [2021-07-09 17:34:51,158 INFO L226 Difference]: Without dead ends: 154 [2021-07-09 17:34:51,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 270.3ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:34:51,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-09 17:34:51,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-07-09 17:34:51,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2026143790849675) internal successors, (337), 153 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:51,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 337 transitions. [2021-07-09 17:34:51,160 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 337 transitions. Word has length 19 [2021-07-09 17:34:51,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:51,160 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 337 transitions. [2021-07-09 17:34:51,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:51,160 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 337 transitions. [2021-07-09 17:34:51,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:51,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:51,160 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:51,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2286,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:51,360 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:51,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:51,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1902880078, now seen corresponding path program 432 times [2021-07-09 17:34:51,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:51,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394439174] [2021-07-09 17:34:51,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:51,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:51,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394439174] [2021-07-09 17:34:51,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394439174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:51,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452100457] [2021-07-09 17:34:51,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:51,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:34:51,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:51,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:51,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:51,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452100457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:51,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:51,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:51,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593034012] [2021-07-09 17:34:51,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:51,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:51,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:51,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:51,583 INFO L87 Difference]: Start difference. First operand 154 states and 337 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:51,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:51,706 INFO L93 Difference]: Finished difference Result 175 states and 373 transitions. [2021-07-09 17:34:51,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:51,707 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:51,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:51,707 INFO L225 Difference]: With dead ends: 175 [2021-07-09 17:34:51,707 INFO L226 Difference]: Without dead ends: 175 [2021-07-09 17:34:51,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:51,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-07-09 17:34:51,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 145. [2021-07-09 17:34:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:51,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-07-09 17:34:51,709 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-07-09 17:34:51,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:51,709 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-07-09 17:34:51,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:51,709 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-07-09 17:34:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:51,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:51,709 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:51,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2291,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:51,910 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:51,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:51,910 INFO L82 PathProgramCache]: Analyzing trace with hash -803588398, now seen corresponding path program 433 times [2021-07-09 17:34:51,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:51,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304596022] [2021-07-09 17:34:51,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:51,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:51,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304596022] [2021-07-09 17:34:51,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304596022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:51,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383732333] [2021-07-09 17:34:51,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:52,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:52,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:52,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:52,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:52,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,128 INFO L628 ElimStorePlain]: treesize reduction 40, result has 29.8 percent of original size [2021-07-09 17:34:52,128 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:52,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,128 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-07-09 17:34:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:52,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383732333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:52,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:52,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:52,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140573929] [2021-07-09 17:34:52,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:52,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:52,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:52,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:52,144 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:52,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:52,346 INFO L93 Difference]: Finished difference Result 187 states and 400 transitions. [2021-07-09 17:34:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:52,346 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:52,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:52,347 INFO L225 Difference]: With dead ends: 187 [2021-07-09 17:34:52,347 INFO L226 Difference]: Without dead ends: 187 [2021-07-09 17:34:52,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:34:52,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-07-09 17:34:52,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2021-07-09 17:34:52,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-07-09 17:34:52,348 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-07-09 17:34:52,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:52,349 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-07-09 17:34:52,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:52,349 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-07-09 17:34:52,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:52,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:52,349 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:52,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2295,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:52,549 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:52,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:52,550 INFO L82 PathProgramCache]: Analyzing trace with hash -2048367454, now seen corresponding path program 434 times [2021-07-09 17:34:52,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:52,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282401502] [2021-07-09 17:34:52,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:52,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:52,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282401502] [2021-07-09 17:34:52,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282401502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:52,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422431501] [2021-07-09 17:34:52,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:52,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:52,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:52,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:52,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:52,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:52,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:52,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,779 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-07-09 17:34:52,779 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:52,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,779 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-07-09 17:34:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:52,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422431501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:52,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:52,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:52,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15111438] [2021-07-09 17:34:52,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:52,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:52,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:52,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:52,795 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:53,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:53,145 INFO L93 Difference]: Finished difference Result 197 states and 420 transitions. [2021-07-09 17:34:53,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:34:53,145 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:53,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:53,146 INFO L225 Difference]: With dead ends: 197 [2021-07-09 17:34:53,146 INFO L226 Difference]: Without dead ends: 197 [2021-07-09 17:34:53,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:34:53,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-09 17:34:53,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 145. [2021-07-09 17:34:53,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:53,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-07-09 17:34:53,148 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-07-09 17:34:53,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:53,148 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-07-09 17:34:53,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:53,148 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-07-09 17:34:53,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:53,148 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:53,148 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:53,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2296,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:53,348 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:53,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:53,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1236614354, now seen corresponding path program 435 times [2021-07-09 17:34:53,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:53,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292458753] [2021-07-09 17:34:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:53,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:53,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292458753] [2021-07-09 17:34:53,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292458753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:53,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574536957] [2021-07-09 17:34:53,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:53,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:34:53,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:53,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:53,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:53,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:53,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:53,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:53,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:53,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:53,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:53,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:53,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:53,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:53,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:53,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:53,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:53,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:53,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:53,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:53,605 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:34:53,605 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:53,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:53,606 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:34:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:53,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574536957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:53,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:53,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:53,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478209231] [2021-07-09 17:34:53,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:53,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:53,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:53,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:53,642 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:54,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:54,191 INFO L93 Difference]: Finished difference Result 219 states and 456 transitions. [2021-07-09 17:34:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:34:54,192 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:54,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:54,192 INFO L225 Difference]: With dead ends: 219 [2021-07-09 17:34:54,192 INFO L226 Difference]: Without dead ends: 219 [2021-07-09 17:34:54,192 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 551.8ms TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:34:54,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-07-09 17:34:54,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 145. [2021-07-09 17:34:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:54,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-07-09 17:34:54,194 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-07-09 17:34:54,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:54,194 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-07-09 17:34:54,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:54,194 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-07-09 17:34:54,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:54,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:54,194 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:54,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2297,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:54,394 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:54,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:54,395 INFO L82 PathProgramCache]: Analyzing trace with hash -174176478, now seen corresponding path program 436 times [2021-07-09 17:34:54,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:54,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172780621] [2021-07-09 17:34:54,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:54,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:54,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172780621] [2021-07-09 17:34:54,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172780621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:54,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762200612] [2021-07-09 17:34:54,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:54,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:54,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:54,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:54,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:54,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:54,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:54,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:54,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:54,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:54,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:54,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:54,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:54,636 INFO L628 ElimStorePlain]: treesize reduction 71, result has 39.3 percent of original size [2021-07-09 17:34:54,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:34:54,639 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:54,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:54,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:54,655 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-07-09 17:34:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:54,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762200612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:54,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:54,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:54,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450970606] [2021-07-09 17:34:54,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:54,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:54,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:54,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:54,685 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:55,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:55,161 INFO L93 Difference]: Finished difference Result 186 states and 395 transitions. [2021-07-09 17:34:55,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:34:55,161 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:55,162 INFO L225 Difference]: With dead ends: 186 [2021-07-09 17:34:55,162 INFO L226 Difference]: Without dead ends: 184 [2021-07-09 17:34:55,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 476.0ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:34:55,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-07-09 17:34:55,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 145. [2021-07-09 17:34:55,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1875) internal successors, (315), 144 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:55,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 315 transitions. [2021-07-09 17:34:55,163 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 315 transitions. Word has length 19 [2021-07-09 17:34:55,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:55,163 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 315 transitions. [2021-07-09 17:34:55,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:55,163 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 315 transitions. [2021-07-09 17:34:55,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:55,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:55,164 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:55,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2307,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:55,364 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:55,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:55,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1698236202, now seen corresponding path program 437 times [2021-07-09 17:34:55,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:55,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295609954] [2021-07-09 17:34:55,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:55,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:55,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295609954] [2021-07-09 17:34:55,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295609954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:55,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033173448] [2021-07-09 17:34:55,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:55,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:34:55,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:55,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:55,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:55,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033173448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:55,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:55,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:55,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115491012] [2021-07-09 17:34:55,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:55,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:55,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:55,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:55,620 INFO L87 Difference]: Start difference. First operand 145 states and 315 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:55,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:55,960 INFO L93 Difference]: Finished difference Result 168 states and 362 transitions. [2021-07-09 17:34:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:34:55,960 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:55,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:55,961 INFO L225 Difference]: With dead ends: 168 [2021-07-09 17:34:55,961 INFO L226 Difference]: Without dead ends: 168 [2021-07-09 17:34:55,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 358.4ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:34:55,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-09 17:34:55,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 142. [2021-07-09 17:34:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1914893617021276) internal successors, (309), 141 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 309 transitions. [2021-07-09 17:34:55,962 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 309 transitions. Word has length 19 [2021-07-09 17:34:55,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:55,962 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 309 transitions. [2021-07-09 17:34:55,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:55,962 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 309 transitions. [2021-07-09 17:34:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:55,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:55,963 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:56,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2311 [2021-07-09 17:34:56,163 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:56,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:56,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1360801562, now seen corresponding path program 438 times [2021-07-09 17:34:56,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:56,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016667054] [2021-07-09 17:34:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:56,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:56,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016667054] [2021-07-09 17:34:56,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016667054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:56,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084762028] [2021-07-09 17:34:56,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:56,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:34:56,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:56,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:56,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:56,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:56,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:56,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:56,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:56,388 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:34:56,389 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:56,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:56,389 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:34:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:56,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084762028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:56,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:56,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:56,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715617839] [2021-07-09 17:34:56,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:56,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:56,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:56,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:56,404 INFO L87 Difference]: Start difference. First operand 142 states and 309 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:56,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:56,570 INFO L93 Difference]: Finished difference Result 184 states and 393 transitions. [2021-07-09 17:34:56,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:56,571 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:56,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:56,571 INFO L225 Difference]: With dead ends: 184 [2021-07-09 17:34:56,571 INFO L226 Difference]: Without dead ends: 184 [2021-07-09 17:34:56,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:34:56,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-07-09 17:34:56,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 144. [2021-07-09 17:34:56,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1888111888111887) internal successors, (313), 143 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 313 transitions. [2021-07-09 17:34:56,573 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 313 transitions. Word has length 19 [2021-07-09 17:34:56,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:56,573 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 313 transitions. [2021-07-09 17:34:56,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:56,573 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 313 transitions. [2021-07-09 17:34:56,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:56,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:56,573 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:56,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 439 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2321 [2021-07-09 17:34:56,774 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:56,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:56,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1000885044, now seen corresponding path program 439 times [2021-07-09 17:34:56,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:56,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663900672] [2021-07-09 17:34:56,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:56,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:56,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663900672] [2021-07-09 17:34:56,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663900672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:56,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475129718] [2021-07-09 17:34:56,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:56,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:56,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:56,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:56,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:56,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:56,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:56,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:56,990 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:56,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:56,993 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,021 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:34:57,022 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:57,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:57,022 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:34:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:57,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475129718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:57,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:57,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:34:57,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114896169] [2021-07-09 17:34:57,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:57,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:57,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:57,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:57,046 INFO L87 Difference]: Start difference. First operand 144 states and 313 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:57,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:57,326 INFO L93 Difference]: Finished difference Result 201 states and 428 transitions. [2021-07-09 17:34:57,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:34:57,326 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:57,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:57,327 INFO L225 Difference]: With dead ends: 201 [2021-07-09 17:34:57,327 INFO L226 Difference]: Without dead ends: 201 [2021-07-09 17:34:57,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 288.9ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:57,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-07-09 17:34:57,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 145. [2021-07-09 17:34:57,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1875) internal successors, (315), 144 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 315 transitions. [2021-07-09 17:34:57,328 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 315 transitions. Word has length 19 [2021-07-09 17:34:57,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:57,328 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 315 transitions. [2021-07-09 17:34:57,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:57,329 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 315 transitions. [2021-07-09 17:34:57,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:57,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:57,329 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:57,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2325,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:57,529 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:57,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:57,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1710932814, now seen corresponding path program 440 times [2021-07-09 17:34:57,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:57,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573429840] [2021-07-09 17:34:57,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:57,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:57,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573429840] [2021-07-09 17:34:57,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573429840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:57,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451091356] [2021-07-09 17:34:57,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:57,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:57,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:57,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:57,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:57,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:57,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:57,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:57,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:57,739 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,775 INFO L628 ElimStorePlain]: treesize reduction 65, result has 38.1 percent of original size [2021-07-09 17:34:57,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:34:57,778 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:34:57,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:57,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:57,793 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-07-09 17:34:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:57,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451091356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:57,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:57,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:57,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265570922] [2021-07-09 17:34:57,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:57,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:57,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:57,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:57,831 INFO L87 Difference]: Start difference. First operand 145 states and 315 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:58,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:58,057 INFO L93 Difference]: Finished difference Result 169 states and 364 transitions. [2021-07-09 17:34:58,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:58,057 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:58,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:58,058 INFO L225 Difference]: With dead ends: 169 [2021-07-09 17:34:58,058 INFO L226 Difference]: Without dead ends: 169 [2021-07-09 17:34:58,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 256.4ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:34:58,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-09 17:34:58,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 143. [2021-07-09 17:34:58,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:58,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-07-09 17:34:58,059 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-07-09 17:34:58,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:58,060 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-07-09 17:34:58,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:58,060 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-07-09 17:34:58,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:58,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:58,060 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:58,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2335 [2021-07-09 17:34:58,260 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:58,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:58,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1755968046, now seen corresponding path program 441 times [2021-07-09 17:34:58,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:58,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758046919] [2021-07-09 17:34:58,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:58,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:58,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758046919] [2021-07-09 17:34:58,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758046919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:58,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099682108] [2021-07-09 17:34:58,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:58,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:34:58,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:58,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:58,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:58,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:58,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:58,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:58,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:58,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:58,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:58,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:58,547 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:34:58,547 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:34:58,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:34:58,550 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:58,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:58,561 INFO L518 ElimStorePlain]: Eliminatee v_prenex_365 vanished before elimination [2021-07-09 17:34:58,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:58,562 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:34:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:58,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099682108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:58,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:58,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:58,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688028682] [2021-07-09 17:34:58,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:58,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:58,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:58,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:58,598 INFO L87 Difference]: Start difference. First operand 143 states and 311 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:58,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:58,919 INFO L93 Difference]: Finished difference Result 188 states and 393 transitions. [2021-07-09 17:34:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:34:58,920 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:58,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:58,920 INFO L225 Difference]: With dead ends: 188 [2021-07-09 17:34:58,920 INFO L226 Difference]: Without dead ends: 188 [2021-07-09 17:34:58,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 328.4ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:58,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-07-09 17:34:58,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2021-07-09 17:34:58,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:58,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-07-09 17:34:58,922 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-07-09 17:34:58,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:58,922 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-07-09 17:34:58,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:58,922 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-07-09 17:34:58,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:58,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:58,922 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:59,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2339,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:59,123 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:59,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:59,123 INFO L82 PathProgramCache]: Analyzing trace with hash 254217664, now seen corresponding path program 442 times [2021-07-09 17:34:59,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:59,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614147559] [2021-07-09 17:34:59,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:59,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:59,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614147559] [2021-07-09 17:34:59,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614147559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:59,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808345155] [2021-07-09 17:34:59,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:59,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:59,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:59,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:59,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:59,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808345155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:59,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:59,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:34:59,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562160176] [2021-07-09 17:34:59,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:34:59,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:59,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:34:59,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:59,386 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:59,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:59,647 INFO L93 Difference]: Finished difference Result 227 states and 469 transitions. [2021-07-09 17:34:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:34:59,647 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:34:59,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:59,648 INFO L225 Difference]: With dead ends: 227 [2021-07-09 17:34:59,648 INFO L226 Difference]: Without dead ends: 227 [2021-07-09 17:34:59,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 272.5ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:59,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-09 17:34:59,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 146. [2021-07-09 17:34:59,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.213793103448276) internal successors, (321), 145 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:59,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 321 transitions. [2021-07-09 17:34:59,649 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 321 transitions. Word has length 19 [2021-07-09 17:34:59,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:59,650 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 321 transitions. [2021-07-09 17:34:59,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:59,650 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 321 transitions. [2021-07-09 17:34:59,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:34:59,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:59,650 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:59,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2346 [2021-07-09 17:34:59,865 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:59,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:59,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1666063996, now seen corresponding path program 443 times [2021-07-09 17:34:59,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:59,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689519558] [2021-07-09 17:34:59,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:59,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:59,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689519558] [2021-07-09 17:34:59,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689519558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:59,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246176212] [2021-07-09 17:34:59,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:59,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:34:59,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:59,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:34:59,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:00,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246176212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:00,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:00,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:00,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129651220] [2021-07-09 17:35:00,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:00,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:00,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:00,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:00,104 INFO L87 Difference]: Start difference. First operand 146 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:00,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:00,361 INFO L93 Difference]: Finished difference Result 156 states and 337 transitions. [2021-07-09 17:35:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:00,362 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:00,362 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:35:00,362 INFO L226 Difference]: Without dead ends: 152 [2021-07-09 17:35:00,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 296.8ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:35:00,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-07-09 17:35:00,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146. [2021-07-09 17:35:00,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.206896551724138) internal successors, (320), 145 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:00,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 320 transitions. [2021-07-09 17:35:00,364 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 320 transitions. Word has length 19 [2021-07-09 17:35:00,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:00,364 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 320 transitions. [2021-07-09 17:35:00,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:00,364 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 320 transitions. [2021-07-09 17:35:00,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:00,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:00,364 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:00,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2358 [2021-07-09 17:35:00,564 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:00,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:00,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1752945230, now seen corresponding path program 444 times [2021-07-09 17:35:00,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:00,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718369809] [2021-07-09 17:35:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:00,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:00,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718369809] [2021-07-09 17:35:00,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718369809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:00,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468280919] [2021-07-09 17:35:00,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:00,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:35:00,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:00,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:00,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:00,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:00,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:00,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:00,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:00,795 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:35:00,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:35:00,798 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:00,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:00,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:00,804 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:35:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:00,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468280919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:00,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:00,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:35:00,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294990514] [2021-07-09 17:35:00,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:35:00,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:00,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:35:00,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:00,821 INFO L87 Difference]: Start difference. First operand 146 states and 320 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:00,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:00,985 INFO L93 Difference]: Finished difference Result 179 states and 383 transitions. [2021-07-09 17:35:00,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:35:00,985 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:00,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:00,986 INFO L225 Difference]: With dead ends: 179 [2021-07-09 17:35:00,986 INFO L226 Difference]: Without dead ends: 179 [2021-07-09 17:35:00,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:35:00,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-07-09 17:35:00,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2021-07-09 17:35:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.192857142857143) internal successors, (307), 140 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:00,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 307 transitions. [2021-07-09 17:35:00,987 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 307 transitions. Word has length 19 [2021-07-09 17:35:00,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:00,987 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 307 transitions. [2021-07-09 17:35:00,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:00,987 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 307 transitions. [2021-07-09 17:35:00,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:00,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:00,988 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:01,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2364 [2021-07-09 17:35:01,188 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:01,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:01,188 INFO L82 PathProgramCache]: Analyzing trace with hash -329141342, now seen corresponding path program 445 times [2021-07-09 17:35:01,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:01,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556326388] [2021-07-09 17:35:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:01,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:01,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556326388] [2021-07-09 17:35:01,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556326388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:01,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154274454] [2021-07-09 17:35:01,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:01,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:01,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:01,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:01,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:01,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:01,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:01,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:01,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:01,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:01,405 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:35:01,405 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:01,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:01,405 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:35:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:01,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154274454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:01,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:01,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:01,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101999894] [2021-07-09 17:35:01,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:01,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:01,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:01,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:01,410 INFO L87 Difference]: Start difference. First operand 141 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:01,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:01,514 INFO L93 Difference]: Finished difference Result 173 states and 371 transitions. [2021-07-09 17:35:01,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:01,514 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:01,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:01,515 INFO L225 Difference]: With dead ends: 173 [2021-07-09 17:35:01,515 INFO L226 Difference]: Without dead ends: 173 [2021-07-09 17:35:01,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:01,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-07-09 17:35:01,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 144. [2021-07-09 17:35:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1888111888111887) internal successors, (313), 143 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:01,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 313 transitions. [2021-07-09 17:35:01,516 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 313 transitions. Word has length 19 [2021-07-09 17:35:01,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:01,516 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 313 transitions. [2021-07-09 17:35:01,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:01,516 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 313 transitions. [2021-07-09 17:35:01,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:01,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:01,517 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:01,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2366 [2021-07-09 17:35:01,717 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:01,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:01,717 INFO L82 PathProgramCache]: Analyzing trace with hash -689057860, now seen corresponding path program 446 times [2021-07-09 17:35:01,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:01,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705365050] [2021-07-09 17:35:01,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:01,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:01,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:01,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705365050] [2021-07-09 17:35:01,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705365050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:01,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512695599] [2021-07-09 17:35:01,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:01,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:01,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:01,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:01,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:01,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:01,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:01,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:01,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:01,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:01,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:01,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:01,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:01,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:01,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:01,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:01,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:01,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:01,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:01,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:01,956 INFO L628 ElimStorePlain]: treesize reduction 71, result has 39.3 percent of original size [2021-07-09 17:35:01,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:01,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:01,959 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:01,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:01,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:01,975 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-07-09 17:35:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:02,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512695599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:02,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:02,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:35:02,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860419463] [2021-07-09 17:35:02,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:35:02,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:02,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:35:02,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:02,014 INFO L87 Difference]: Start difference. First operand 144 states and 313 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:02,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:02,144 INFO L93 Difference]: Finished difference Result 199 states and 423 transitions. [2021-07-09 17:35:02,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:02,145 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:02,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:02,145 INFO L225 Difference]: With dead ends: 199 [2021-07-09 17:35:02,145 INFO L226 Difference]: Without dead ends: 199 [2021-07-09 17:35:02,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 175.7ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:02,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-09 17:35:02,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 145. [2021-07-09 17:35:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1875) internal successors, (315), 144 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 315 transitions. [2021-07-09 17:35:02,147 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 315 transitions. Word has length 19 [2021-07-09 17:35:02,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:02,147 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 315 transitions. [2021-07-09 17:35:02,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:02,147 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 315 transitions. [2021-07-09 17:35:02,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:02,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:02,147 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:02,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2370 [2021-07-09 17:35:02,348 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:02,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:02,348 INFO L82 PathProgramCache]: Analyzing trace with hash 20989910, now seen corresponding path program 447 times [2021-07-09 17:35:02,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:02,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384239192] [2021-07-09 17:35:02,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:02,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:02,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384239192] [2021-07-09 17:35:02,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384239192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:02,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352305336] [2021-07-09 17:35:02,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:02,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:35:02,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:02,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:02,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:02,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352305336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:02,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:02,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:02,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901496575] [2021-07-09 17:35:02,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:02,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:02,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:02,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:02,613 INFO L87 Difference]: Start difference. First operand 145 states and 315 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:02,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:02,862 INFO L93 Difference]: Finished difference Result 160 states and 345 transitions. [2021-07-09 17:35:02,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:35:02,862 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:02,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:02,863 INFO L225 Difference]: With dead ends: 160 [2021-07-09 17:35:02,863 INFO L226 Difference]: Without dead ends: 160 [2021-07-09 17:35:02,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 260.1ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:02,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-07-09 17:35:02,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 143. [2021-07-09 17:35:02,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:02,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-07-09 17:35:02,864 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-07-09 17:35:02,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:02,864 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-07-09 17:35:02,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:02,864 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-07-09 17:35:02,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:02,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:02,865 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:03,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2373,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:03,065 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:03,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:03,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1499125316, now seen corresponding path program 448 times [2021-07-09 17:35:03,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:03,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165447886] [2021-07-09 17:35:03,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:03,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:03,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165447886] [2021-07-09 17:35:03,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165447886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:03,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135612129] [2021-07-09 17:35:03,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:03,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:03,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:03,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:03,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:03,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:03,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:03,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:03,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:03,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:03,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:03,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:03,359 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:35:03,360 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:03,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:35:03,362 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:03,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:03,374 INFO L518 ElimStorePlain]: Eliminatee v_prenex_368 vanished before elimination [2021-07-09 17:35:03,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:03,376 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:35:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:03,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135612129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:03,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:03,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:03,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951233095] [2021-07-09 17:35:03,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:03,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:03,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:03,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:03,403 INFO L87 Difference]: Start difference. First operand 143 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:03,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:03,643 INFO L93 Difference]: Finished difference Result 180 states and 378 transitions. [2021-07-09 17:35:03,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:35:03,643 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:03,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:03,644 INFO L225 Difference]: With dead ends: 180 [2021-07-09 17:35:03,644 INFO L226 Difference]: Without dead ends: 180 [2021-07-09 17:35:03,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 333.3ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:35:03,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-07-09 17:35:03,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 145. [2021-07-09 17:35:03,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:03,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-07-09 17:35:03,645 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-07-09 17:35:03,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:03,645 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-07-09 17:35:03,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:03,645 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-07-09 17:35:03,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:03,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:03,646 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:03,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2383,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:03,846 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:03,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:03,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1435725240, now seen corresponding path program 449 times [2021-07-09 17:35:03,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:03,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656719642] [2021-07-09 17:35:03,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:03,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:03,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:03,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656719642] [2021-07-09 17:35:03,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656719642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:03,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923245875] [2021-07-09 17:35:03,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:03,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:35:03,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:03,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:03,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:04,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923245875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:04,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:04,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:35:04,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93465600] [2021-07-09 17:35:04,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:35:04,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:04,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:35:04,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:04,142 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:04,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:04,544 INFO L93 Difference]: Finished difference Result 211 states and 436 transitions. [2021-07-09 17:35:04,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:04,545 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:04,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:04,545 INFO L225 Difference]: With dead ends: 211 [2021-07-09 17:35:04,545 INFO L226 Difference]: Without dead ends: 211 [2021-07-09 17:35:04,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 432.0ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:35:04,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-09 17:35:04,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 146. [2021-07-09 17:35:04,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.213793103448276) internal successors, (321), 145 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:04,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 321 transitions. [2021-07-09 17:35:04,547 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 321 transitions. Word has length 19 [2021-07-09 17:35:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:04,547 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 321 transitions. [2021-07-09 17:35:04,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 321 transitions. [2021-07-09 17:35:04,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:04,547 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:04,547 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:04,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2390,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:04,747 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:04,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:04,748 INFO L82 PathProgramCache]: Analyzing trace with hash -23878908, now seen corresponding path program 450 times [2021-07-09 17:35:04,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:04,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489753754] [2021-07-09 17:35:04,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:04,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:04,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489753754] [2021-07-09 17:35:04,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489753754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:04,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542443857] [2021-07-09 17:35:04,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:04,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:35:04,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:04,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:04,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:05,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542443857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:05,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:05,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:05,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870365341] [2021-07-09 17:35:05,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:05,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:05,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:05,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:05,000 INFO L87 Difference]: Start difference. First operand 146 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:05,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:05,203 INFO L93 Difference]: Finished difference Result 150 states and 325 transitions. [2021-07-09 17:35:05,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:35:05,203 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:05,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:05,203 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:35:05,203 INFO L226 Difference]: Without dead ends: 146 [2021-07-09 17:35:05,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 265.7ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:35:05,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-09 17:35:05,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-07-09 17:35:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.206896551724138) internal successors, (320), 145 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:05,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 320 transitions. [2021-07-09 17:35:05,205 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 320 transitions. Word has length 19 [2021-07-09 17:35:05,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:05,205 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 320 transitions. [2021-07-09 17:35:05,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:05,205 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 320 transitions. [2021-07-09 17:35:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:05,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:05,205 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:05,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2400 [2021-07-09 17:35:05,406 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:05,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:05,406 INFO L82 PathProgramCache]: Analyzing trace with hash 63002326, now seen corresponding path program 451 times [2021-07-09 17:35:05,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:05,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623059432] [2021-07-09 17:35:05,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:05,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:05,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623059432] [2021-07-09 17:35:05,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623059432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:05,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196275814] [2021-07-09 17:35:05,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:05,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:05,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:05,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:05,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:05,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:05,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:05,657 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:35:05,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:35:05,660 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:05,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:05,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:05,665 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:35:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:05,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196275814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:05,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:05,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:35:05,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472814922] [2021-07-09 17:35:05,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:35:05,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:05,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:35:05,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:05,682 INFO L87 Difference]: Start difference. First operand 146 states and 320 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:05,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:05,848 INFO L93 Difference]: Finished difference Result 168 states and 361 transitions. [2021-07-09 17:35:05,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:35:05,848 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:05,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:05,848 INFO L225 Difference]: With dead ends: 168 [2021-07-09 17:35:05,849 INFO L226 Difference]: Without dead ends: 168 [2021-07-09 17:35:05,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 208.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:35:05,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-09 17:35:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 142. [2021-07-09 17:35:05,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1914893617021276) internal successors, (309), 141 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:05,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 309 transitions. [2021-07-09 17:35:05,850 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 309 transitions. Word has length 19 [2021-07-09 17:35:05,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:05,850 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 309 transitions. [2021-07-09 17:35:05,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:05,850 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 309 transitions. [2021-07-09 17:35:05,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:05,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:05,851 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:06,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2405 [2021-07-09 17:35:06,051 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:06,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:06,051 INFO L82 PathProgramCache]: Analyzing trace with hash -36741934, now seen corresponding path program 452 times [2021-07-09 17:35:06,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:06,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417712977] [2021-07-09 17:35:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:06,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:06,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417712977] [2021-07-09 17:35:06,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417712977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:06,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379585392] [2021-07-09 17:35:06,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:06,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:06,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:06,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:06,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:06,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:06,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:06,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:06,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:06,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:06,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:06,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:06,371 INFO L628 ElimStorePlain]: treesize reduction 78, result has 39.5 percent of original size [2021-07-09 17:35:06,372 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:06,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:06,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:06,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:06,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:06,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:06,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:06,392 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:06,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:06,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:06,406 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-07-09 17:35:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:06,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379585392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:06,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:06,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:35:06,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816696132] [2021-07-09 17:35:06,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:35:06,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:06,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:35:06,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:06,449 INFO L87 Difference]: Start difference. First operand 142 states and 309 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:06,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:06,650 INFO L93 Difference]: Finished difference Result 184 states and 385 transitions. [2021-07-09 17:35:06,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:06,650 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:06,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:06,650 INFO L225 Difference]: With dead ends: 184 [2021-07-09 17:35:06,650 INFO L226 Difference]: Without dead ends: 184 [2021-07-09 17:35:06,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:35:06,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-07-09 17:35:06,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 144. [2021-07-09 17:35:06,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.202797202797203) internal successors, (315), 143 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:06,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 315 transitions. [2021-07-09 17:35:06,652 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 315 transitions. Word has length 19 [2021-07-09 17:35:06,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:06,652 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 315 transitions. [2021-07-09 17:35:06,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:06,652 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 315 transitions. [2021-07-09 17:35:06,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:06,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:06,652 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:06,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2407,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:06,853 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:06,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:06,853 INFO L82 PathProgramCache]: Analyzing trace with hash -909677188, now seen corresponding path program 453 times [2021-07-09 17:35:06,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:06,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106900678] [2021-07-09 17:35:06,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:06,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:06,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106900678] [2021-07-09 17:35:06,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106900678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:06,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953231749] [2021-07-09 17:35:06,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:06,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:35:06,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:06,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:06,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:07,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953231749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:07,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:07,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:07,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620863449] [2021-07-09 17:35:07,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:07,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:07,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:07,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:07,109 INFO L87 Difference]: Start difference. First operand 144 states and 315 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:07,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:07,478 INFO L93 Difference]: Finished difference Result 152 states and 325 transitions. [2021-07-09 17:35:07,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:07,478 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:07,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:07,478 INFO L225 Difference]: With dead ends: 152 [2021-07-09 17:35:07,478 INFO L226 Difference]: Without dead ends: 148 [2021-07-09 17:35:07,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 394.9ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:35:07,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-07-09 17:35:07,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2021-07-09 17:35:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.195804195804196) internal successors, (314), 143 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:07,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 314 transitions. [2021-07-09 17:35:07,480 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 314 transitions. Word has length 19 [2021-07-09 17:35:07,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:07,480 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 314 transitions. [2021-07-09 17:35:07,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:07,480 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 314 transitions. [2021-07-09 17:35:07,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:07,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:07,480 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:07,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2413 [2021-07-09 17:35:07,681 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:07,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:07,681 INFO L82 PathProgramCache]: Analyzing trace with hash -822795954, now seen corresponding path program 454 times [2021-07-09 17:35:07,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:07,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62783726] [2021-07-09 17:35:07,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:07,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:07,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62783726] [2021-07-09 17:35:07,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62783726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:07,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918290440] [2021-07-09 17:35:07,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:07,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:07,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:07,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:07,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:07,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:07,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:07,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:07,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:07,929 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:35:07,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:35:07,932 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:07,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:07,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:07,938 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:35:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:07,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918290440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:07,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:07,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:35:07,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507614899] [2021-07-09 17:35:07,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:35:07,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:07,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:35:07,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:07,955 INFO L87 Difference]: Start difference. First operand 144 states and 314 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:08,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:08,259 INFO L93 Difference]: Finished difference Result 184 states and 389 transitions. [2021-07-09 17:35:08,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:35:08,259 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:08,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:08,259 INFO L225 Difference]: With dead ends: 184 [2021-07-09 17:35:08,259 INFO L226 Difference]: Without dead ends: 184 [2021-07-09 17:35:08,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 348.2ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:35:08,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-07-09 17:35:08,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 145. [2021-07-09 17:35:08,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.2083333333333335) internal successors, (318), 144 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:08,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 318 transitions. [2021-07-09 17:35:08,261 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 318 transitions. Word has length 19 [2021-07-09 17:35:08,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:08,261 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 318 transitions. [2021-07-09 17:35:08,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:08,261 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 318 transitions. [2021-07-09 17:35:08,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:08,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:08,261 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:08,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2418 [2021-07-09 17:35:08,462 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:08,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:08,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1416023454, now seen corresponding path program 455 times [2021-07-09 17:35:08,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:08,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297116273] [2021-07-09 17:35:08,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:08,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:08,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297116273] [2021-07-09 17:35:08,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297116273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:08,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486883059] [2021-07-09 17:35:08,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:08,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:35:08,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:08,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:08,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:08,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486883059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:08,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:08,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:08,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813363941] [2021-07-09 17:35:08,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:08,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:08,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:08,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:08,686 INFO L87 Difference]: Start difference. First operand 145 states and 318 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:08,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:08,920 INFO L93 Difference]: Finished difference Result 151 states and 325 transitions. [2021-07-09 17:35:08,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:35:08,921 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:08,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:08,921 INFO L225 Difference]: With dead ends: 151 [2021-07-09 17:35:08,921 INFO L226 Difference]: Without dead ends: 145 [2021-07-09 17:35:08,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 266.3ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:08,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-09 17:35:08,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-07-09 17:35:08,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.201388888888889) internal successors, (317), 144 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:08,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 317 transitions. [2021-07-09 17:35:08,922 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 317 transitions. Word has length 19 [2021-07-09 17:35:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:08,922 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 317 transitions. [2021-07-09 17:35:08,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 317 transitions. [2021-07-09 17:35:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:08,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:08,923 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:09,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2420 [2021-07-09 17:35:09,123 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:09,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:09,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1365387222, now seen corresponding path program 456 times [2021-07-09 17:35:09,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:09,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441504774] [2021-07-09 17:35:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:09,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:09,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441504774] [2021-07-09 17:35:09,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441504774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:09,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080083212] [2021-07-09 17:35:09,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:09,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:35:09,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:09,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:09,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:09,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:09,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:09,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,382 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:35:09,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:35:09,385 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:09,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:09,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,391 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:35:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:09,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080083212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:09,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:09,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:35:09,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337427103] [2021-07-09 17:35:09,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:35:09,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:09,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:35:09,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:09,409 INFO L87 Difference]: Start difference. First operand 145 states and 317 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:09,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:09,570 INFO L93 Difference]: Finished difference Result 170 states and 362 transitions. [2021-07-09 17:35:09,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:35:09,571 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:09,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:09,571 INFO L225 Difference]: With dead ends: 170 [2021-07-09 17:35:09,571 INFO L226 Difference]: Without dead ends: 170 [2021-07-09 17:35:09,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:09,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-07-09 17:35:09,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 143. [2021-07-09 17:35:09,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:09,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-07-09 17:35:09,573 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-07-09 17:35:09,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:09,573 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-07-09 17:35:09,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:09,573 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-07-09 17:35:09,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:09,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:09,573 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:09,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2425 [2021-07-09 17:35:09,773 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:09,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:09,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1177763814, now seen corresponding path program 457 times [2021-07-09 17:35:09,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:09,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328773556] [2021-07-09 17:35:09,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:09,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:09,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328773556] [2021-07-09 17:35:09,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328773556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:09,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468589794] [2021-07-09 17:35:09,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:09,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:09,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:09,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:09,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:09,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:10,014 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:35:10,014 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:10,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:10,015 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:35:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:10,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468589794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:10,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:10,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:35:10,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325133503] [2021-07-09 17:35:10,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:35:10,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:10,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:35:10,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:10,034 INFO L87 Difference]: Start difference. First operand 143 states and 311 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:10,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:10,219 INFO L93 Difference]: Finished difference Result 174 states and 373 transitions. [2021-07-09 17:35:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:35:10,220 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:10,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:10,220 INFO L225 Difference]: With dead ends: 174 [2021-07-09 17:35:10,220 INFO L226 Difference]: Without dead ends: 174 [2021-07-09 17:35:10,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:35:10,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-09 17:35:10,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 145. [2021-07-09 17:35:10,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1875) internal successors, (315), 144 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 315 transitions. [2021-07-09 17:35:10,222 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 315 transitions. Word has length 19 [2021-07-09 17:35:10,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:10,222 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 315 transitions. [2021-07-09 17:35:10,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:10,222 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 315 transitions. [2021-07-09 17:35:10,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:10,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:10,222 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:10,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2427,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:10,423 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:10,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:10,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1537680332, now seen corresponding path program 458 times [2021-07-09 17:35:10,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:10,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460601302] [2021-07-09 17:35:10,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:10,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:10,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460601302] [2021-07-09 17:35:10,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460601302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:10,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87109920] [2021-07-09 17:35:10,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:10,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:10,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:10,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:10,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:10,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:10,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:10,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:10,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:10,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:10,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:10,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:10,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:10,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:10,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:10,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:10,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:10,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:10,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:10,614 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:10,652 INFO L628 ElimStorePlain]: treesize reduction 71, result has 39.3 percent of original size [2021-07-09 17:35:10,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:10,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:10,655 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:10,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:10,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:10,671 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-07-09 17:35:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:10,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87109920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:10,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:10,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:35:10,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888044471] [2021-07-09 17:35:10,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:35:10,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:10,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:35:10,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:10,709 INFO L87 Difference]: Start difference. First operand 145 states and 315 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:10,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:10,890 INFO L93 Difference]: Finished difference Result 200 states and 425 transitions. [2021-07-09 17:35:10,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:35:10,890 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:10,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:10,890 INFO L225 Difference]: With dead ends: 200 [2021-07-09 17:35:10,890 INFO L226 Difference]: Without dead ends: 200 [2021-07-09 17:35:10,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:10,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-09 17:35:10,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 146. [2021-07-09 17:35:10,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1862068965517243) internal successors, (317), 145 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:10,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 317 transitions. [2021-07-09 17:35:10,892 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 317 transitions. Word has length 19 [2021-07-09 17:35:10,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:10,892 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 317 transitions. [2021-07-09 17:35:10,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:10,892 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 317 transitions. [2021-07-09 17:35:10,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:10,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:10,892 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:11,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2431,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:11,093 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:11,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:11,093 INFO L82 PathProgramCache]: Analyzing trace with hash -827632562, now seen corresponding path program 459 times [2021-07-09 17:35:11,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:11,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397542227] [2021-07-09 17:35:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:11,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:11,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397542227] [2021-07-09 17:35:11,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397542227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:11,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597022848] [2021-07-09 17:35:11,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:11,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:35:11,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:11,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:11,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:11,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597022848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:11,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:11,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:11,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901825081] [2021-07-09 17:35:11,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:11,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:11,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:11,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:11,331 INFO L87 Difference]: Start difference. First operand 146 states and 317 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:11,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:11,519 INFO L93 Difference]: Finished difference Result 161 states and 347 transitions. [2021-07-09 17:35:11,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:11,519 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:11,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:11,520 INFO L225 Difference]: With dead ends: 161 [2021-07-09 17:35:11,520 INFO L226 Difference]: Without dead ends: 161 [2021-07-09 17:35:11,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:11,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-09 17:35:11,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 144. [2021-07-09 17:35:11,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1888111888111887) internal successors, (313), 143 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:11,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 313 transitions. [2021-07-09 17:35:11,521 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 313 transitions. Word has length 19 [2021-07-09 17:35:11,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:11,521 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 313 transitions. [2021-07-09 17:35:11,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:11,521 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 313 transitions. [2021-07-09 17:35:11,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:11,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:11,522 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:11,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2434,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:11,722 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:11,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:11,722 INFO L82 PathProgramCache]: Analyzing trace with hash 650502844, now seen corresponding path program 460 times [2021-07-09 17:35:11,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:11,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334634825] [2021-07-09 17:35:11,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:11,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:11,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334634825] [2021-07-09 17:35:11,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334634825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:11,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762090665] [2021-07-09 17:35:11,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:11,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:11,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:11,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:11,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:11,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:11,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:11,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:11,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:11,992 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:35:11,993 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:11,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:35:11,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:12,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:12,007 INFO L518 ElimStorePlain]: Eliminatee v_prenex_376 vanished before elimination [2021-07-09 17:35:12,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:12,007 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:35:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:12,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762090665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:12,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:12,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:35:12,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020737157] [2021-07-09 17:35:12,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:35:12,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:12,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:35:12,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:12,043 INFO L87 Difference]: Start difference. First operand 144 states and 313 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:12,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:12,339 INFO L93 Difference]: Finished difference Result 182 states and 382 transitions. [2021-07-09 17:35:12,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:35:12,339 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:12,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:12,339 INFO L225 Difference]: With dead ends: 182 [2021-07-09 17:35:12,340 INFO L226 Difference]: Without dead ends: 182 [2021-07-09 17:35:12,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 304.8ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:35:12,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-07-09 17:35:12,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 146. [2021-07-09 17:35:12,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.193103448275862) internal successors, (318), 145 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:12,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 318 transitions. [2021-07-09 17:35:12,341 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 318 transitions. Word has length 19 [2021-07-09 17:35:12,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:12,341 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 318 transitions. [2021-07-09 17:35:12,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:12,341 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 318 transitions. [2021-07-09 17:35:12,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:12,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:12,342 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:12,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2444 [2021-07-09 17:35:12,542 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:12,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:12,542 INFO L82 PathProgramCache]: Analyzing trace with hash 2010619584, now seen corresponding path program 461 times [2021-07-09 17:35:12,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:12,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877692532] [2021-07-09 17:35:12,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:12,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:12,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877692532] [2021-07-09 17:35:12,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877692532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:12,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728628717] [2021-07-09 17:35:12,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:12,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:35:12,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:12,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:12,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:12,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728628717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:12,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:12,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:12,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394506769] [2021-07-09 17:35:12,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:12,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:12,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:12,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:12,795 INFO L87 Difference]: Start difference. First operand 146 states and 318 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:13,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:13,027 INFO L93 Difference]: Finished difference Result 205 states and 423 transitions. [2021-07-09 17:35:13,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:13,027 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:13,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:13,027 INFO L225 Difference]: With dead ends: 205 [2021-07-09 17:35:13,027 INFO L226 Difference]: Without dead ends: 205 [2021-07-09 17:35:13,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 241.5ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:35:13,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-09 17:35:13,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 147. [2021-07-09 17:35:13,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.212328767123288) internal successors, (323), 146 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 323 transitions. [2021-07-09 17:35:13,029 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 323 transitions. Word has length 19 [2021-07-09 17:35:13,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:13,029 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 323 transitions. [2021-07-09 17:35:13,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:13,029 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 323 transitions. [2021-07-09 17:35:13,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:13,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:13,030 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:13,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2451,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:13,249 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:13,250 INFO L82 PathProgramCache]: Analyzing trace with hash -872501380, now seen corresponding path program 462 times [2021-07-09 17:35:13,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:13,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641475065] [2021-07-09 17:35:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:13,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:13,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641475065] [2021-07-09 17:35:13,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641475065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:13,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350224575] [2021-07-09 17:35:13,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:13,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:35:13,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:13,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:13,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:13,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350224575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:13,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:13,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:13,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451374233] [2021-07-09 17:35:13,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:13,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:13,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:13,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:13,489 INFO L87 Difference]: Start difference. First operand 147 states and 323 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:13,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:13,661 INFO L93 Difference]: Finished difference Result 151 states and 327 transitions. [2021-07-09 17:35:13,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:13,661 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:13,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:13,662 INFO L225 Difference]: With dead ends: 151 [2021-07-09 17:35:13,662 INFO L226 Difference]: Without dead ends: 147 [2021-07-09 17:35:13,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 218.8ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:13,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-09 17:35:13,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-07-09 17:35:13,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.2054794520547945) internal successors, (322), 146 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:13,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 322 transitions. [2021-07-09 17:35:13,663 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 322 transitions. Word has length 19 [2021-07-09 17:35:13,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:13,663 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 322 transitions. [2021-07-09 17:35:13,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:13,663 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 322 transitions. [2021-07-09 17:35:13,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:13,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:13,664 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:13,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 463 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2463 [2021-07-09 17:35:13,864 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:13,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:13,864 INFO L82 PathProgramCache]: Analyzing trace with hash -785620146, now seen corresponding path program 463 times [2021-07-09 17:35:13,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:13,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59167802] [2021-07-09 17:35:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:13,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:13,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59167802] [2021-07-09 17:35:13,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59167802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:13,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161650061] [2021-07-09 17:35:13,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:13,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:13,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:14,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:14,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:14,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,105 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-07-09 17:35:14,105 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:14,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,106 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:35:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:14,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161650061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:14,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:14,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:35:14,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518471132] [2021-07-09 17:35:14,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:35:14,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:14,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:35:14,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:14,123 INFO L87 Difference]: Start difference. First operand 147 states and 322 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:14,253 INFO L93 Difference]: Finished difference Result 165 states and 353 transitions. [2021-07-09 17:35:14,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:35:14,253 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:14,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:14,253 INFO L225 Difference]: With dead ends: 165 [2021-07-09 17:35:14,253 INFO L226 Difference]: Without dead ends: 165 [2021-07-09 17:35:14,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 214.9ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:35:14,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-07-09 17:35:14,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 143. [2021-07-09 17:35:14,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-07-09 17:35:14,255 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-07-09 17:35:14,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:14,255 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-07-09 17:35:14,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:14,255 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-07-09 17:35:14,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:14,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:14,255 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:14,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2467 [2021-07-09 17:35:14,456 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:14,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:14,456 INFO L82 PathProgramCache]: Analyzing trace with hash -885364406, now seen corresponding path program 464 times [2021-07-09 17:35:14,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:14,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7699932] [2021-07-09 17:35:14,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:14,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:14,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7699932] [2021-07-09 17:35:14,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7699932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:14,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116848323] [2021-07-09 17:35:14,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:14,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:14,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:14,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:14,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:14,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:14,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:14,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,783 INFO L628 ElimStorePlain]: treesize reduction 74, result has 42.6 percent of original size [2021-07-09 17:35:14,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:14,786 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:14,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:14,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:35:14,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:14,818 INFO L518 ElimStorePlain]: Eliminatee v_prenex_379 vanished before elimination [2021-07-09 17:35:14,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:14,819 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-07-09 17:35:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:14,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116848323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:14,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:14,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:35:14,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273671884] [2021-07-09 17:35:14,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:35:14,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:14,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:35:14,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:14,862 INFO L87 Difference]: Start difference. First operand 143 states and 311 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:15,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:15,103 INFO L93 Difference]: Finished difference Result 178 states and 372 transitions. [2021-07-09 17:35:15,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:15,103 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:15,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:15,103 INFO L225 Difference]: With dead ends: 178 [2021-07-09 17:35:15,103 INFO L226 Difference]: Without dead ends: 178 [2021-07-09 17:35:15,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 287.4ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:35:15,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-07-09 17:35:15,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 145. [2021-07-09 17:35:15,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:15,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-07-09 17:35:15,105 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-07-09 17:35:15,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:15,105 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-07-09 17:35:15,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:15,105 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-07-09 17:35:15,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:15,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:15,105 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:15,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2469,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:15,306 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:15,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:15,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1124821304, now seen corresponding path program 465 times [2021-07-09 17:35:15,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:15,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96932563] [2021-07-09 17:35:15,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:15,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:15,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96932563] [2021-07-09 17:35:15,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96932563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:15,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065119536] [2021-07-09 17:35:15,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:15,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:35:15,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:15,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:15,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:15,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065119536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:15,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:15,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:15,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965983442] [2021-07-09 17:35:15,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:15,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:15,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:15,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:15,574 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:15,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:15,986 INFO L93 Difference]: Finished difference Result 220 states and 452 transitions. [2021-07-09 17:35:15,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:35:15,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:15,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:15,987 INFO L225 Difference]: With dead ends: 220 [2021-07-09 17:35:15,987 INFO L226 Difference]: Without dead ends: 220 [2021-07-09 17:35:15,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 413.1ms TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:35:15,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-07-09 17:35:15,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 147. [2021-07-09 17:35:15,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.219178082191781) internal successors, (324), 146 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 324 transitions. [2021-07-09 17:35:15,989 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 324 transitions. Word has length 19 [2021-07-09 17:35:15,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:15,989 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 324 transitions. [2021-07-09 17:35:15,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:15,989 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 324 transitions. [2021-07-09 17:35:15,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:15,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:15,989 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:16,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2475 [2021-07-09 17:35:16,189 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:16,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:16,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1758299660, now seen corresponding path program 466 times [2021-07-09 17:35:16,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:16,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372622728] [2021-07-09 17:35:16,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:16,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:16,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372622728] [2021-07-09 17:35:16,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372622728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:16,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544143175] [2021-07-09 17:35:16,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:16,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:16,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:16,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:16,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:16,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544143175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:16,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:16,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:16,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993457713] [2021-07-09 17:35:16,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:16,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:16,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:16,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:16,460 INFO L87 Difference]: Start difference. First operand 147 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:16,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:16,813 INFO L93 Difference]: Finished difference Result 155 states and 334 transitions. [2021-07-09 17:35:16,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:35:16,814 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:16,814 INFO L225 Difference]: With dead ends: 155 [2021-07-09 17:35:16,814 INFO L226 Difference]: Without dead ends: 151 [2021-07-09 17:35:16,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 400.1ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:35:16,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-09 17:35:16,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2021-07-09 17:35:16,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.212328767123288) internal successors, (323), 146 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 323 transitions. [2021-07-09 17:35:16,816 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 323 transitions. Word has length 19 [2021-07-09 17:35:16,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:16,816 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 323 transitions. [2021-07-09 17:35:16,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:16,816 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 323 transitions. [2021-07-09 17:35:16,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:16,816 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:16,816 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:17,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2487,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:17,016 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:17,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:17,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1671418426, now seen corresponding path program 467 times [2021-07-09 17:35:17,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:17,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503816567] [2021-07-09 17:35:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:17,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:17,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503816567] [2021-07-09 17:35:17,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503816567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:17,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677351942] [2021-07-09 17:35:17,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:17,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:35:17,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:17,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:17,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:17,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677351942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:17,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:17,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:17,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726300188] [2021-07-09 17:35:17,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:17,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:17,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:17,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:17,255 INFO L87 Difference]: Start difference. First operand 147 states and 323 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:17,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:17,631 INFO L93 Difference]: Finished difference Result 180 states and 383 transitions. [2021-07-09 17:35:17,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:17,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:17,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:17,632 INFO L225 Difference]: With dead ends: 180 [2021-07-09 17:35:17,632 INFO L226 Difference]: Without dead ends: 180 [2021-07-09 17:35:17,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 394.1ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:35:17,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-07-09 17:35:17,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 146. [2021-07-09 17:35:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.213793103448276) internal successors, (321), 145 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:17,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 321 transitions. [2021-07-09 17:35:17,634 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 321 transitions. Word has length 19 [2021-07-09 17:35:17,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:17,634 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 321 transitions. [2021-07-09 17:35:17,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:17,634 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 321 transitions. [2021-07-09 17:35:17,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:17,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:17,634 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:17,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2492,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:17,834 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:17,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:17,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2030321370, now seen corresponding path program 468 times [2021-07-09 17:35:17,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:17,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119485279] [2021-07-09 17:35:17,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:17,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:17,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119485279] [2021-07-09 17:35:17,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119485279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:17,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091356482] [2021-07-09 17:35:17,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:17,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:35:17,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:17,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:17,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:18,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091356482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:18,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:18,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:18,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78236714] [2021-07-09 17:35:18,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:18,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:18,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:18,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:18,077 INFO L87 Difference]: Start difference. First operand 146 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:18,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:18,277 INFO L93 Difference]: Finished difference Result 152 states and 328 transitions. [2021-07-09 17:35:18,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:35:18,278 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:18,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:18,278 INFO L225 Difference]: With dead ends: 152 [2021-07-09 17:35:18,278 INFO L226 Difference]: Without dead ends: 146 [2021-07-09 17:35:18,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:35:18,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-09 17:35:18,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-07-09 17:35:18,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.206896551724138) internal successors, (320), 145 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:18,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 320 transitions. [2021-07-09 17:35:18,280 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 320 transitions. Word has length 19 [2021-07-09 17:35:18,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:18,280 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 320 transitions. [2021-07-09 17:35:18,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:18,280 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 320 transitions. [2021-07-09 17:35:18,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:18,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:18,280 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:18,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 469 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2496 [2021-07-09 17:35:18,481 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:18,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:18,481 INFO L82 PathProgramCache]: Analyzing trace with hash 516764750, now seen corresponding path program 469 times [2021-07-09 17:35:18,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:18,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023521647] [2021-07-09 17:35:18,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:18,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:18,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023521647] [2021-07-09 17:35:18,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023521647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:18,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770407509] [2021-07-09 17:35:18,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:18,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:18,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:18,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:18,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:18,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:18,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:18,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:18,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:18,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:18,736 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:35:18,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:18,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:35:18,738 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:18,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:18,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:18,744 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:35:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:18,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770407509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:18,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:18,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:35:18,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898228457] [2021-07-09 17:35:18,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:35:18,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:18,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:35:18,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:18,762 INFO L87 Difference]: Start difference. First operand 146 states and 320 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:18,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:18,921 INFO L93 Difference]: Finished difference Result 170 states and 361 transitions. [2021-07-09 17:35:18,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:18,921 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:18,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:18,921 INFO L225 Difference]: With dead ends: 170 [2021-07-09 17:35:18,921 INFO L226 Difference]: Without dead ends: 170 [2021-07-09 17:35:18,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:18,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-07-09 17:35:18,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 141. [2021-07-09 17:35:18,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1857142857142855) internal successors, (306), 140 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:18,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 306 transitions. [2021-07-09 17:35:18,923 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 306 transitions. Word has length 19 [2021-07-09 17:35:18,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:18,923 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 306 transitions. [2021-07-09 17:35:18,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:18,923 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 306 transitions. [2021-07-09 17:35:18,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:18,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:18,923 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:19,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2500 [2021-07-09 17:35:19,124 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:19,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:19,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1925238340, now seen corresponding path program 470 times [2021-07-09 17:35:19,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:19,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766238716] [2021-07-09 17:35:19,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:19,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:19,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766238716] [2021-07-09 17:35:19,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766238716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:19,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535916917] [2021-07-09 17:35:19,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:19,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:19,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:19,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:19,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:19,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:19,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:19,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:19,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:19,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:19,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:19,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:19,466 INFO L628 ElimStorePlain]: treesize reduction 76, result has 41.1 percent of original size [2021-07-09 17:35:19,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:19,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:19,470 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:19,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:19,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:35:19,487 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:19,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:19,501 INFO L518 ElimStorePlain]: Eliminatee v_prenex_386 vanished before elimination [2021-07-09 17:35:19,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:19,502 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-07-09 17:35:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:19,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535916917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:19,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:19,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:35:19,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196811613] [2021-07-09 17:35:19,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:35:19,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:19,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:35:19,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:19,546 INFO L87 Difference]: Start difference. First operand 141 states and 306 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:19,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:19,783 INFO L93 Difference]: Finished difference Result 184 states and 384 transitions. [2021-07-09 17:35:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:35:19,784 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:19,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:19,784 INFO L225 Difference]: With dead ends: 184 [2021-07-09 17:35:19,784 INFO L226 Difference]: Without dead ends: 184 [2021-07-09 17:35:19,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 300.4ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:35:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-07-09 17:35:19,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 141. [2021-07-09 17:35:19,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1857142857142855) internal successors, (306), 140 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:19,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 306 transitions. [2021-07-09 17:35:19,786 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 306 transitions. Word has length 19 [2021-07-09 17:35:19,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:19,786 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 306 transitions. [2021-07-09 17:35:19,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:19,786 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 306 transitions. [2021-07-09 17:35:19,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:19,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:19,786 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:19,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2502 [2021-07-09 17:35:19,987 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:19,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:19,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1215190570, now seen corresponding path program 471 times [2021-07-09 17:35:19,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:19,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088332678] [2021-07-09 17:35:19,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:20,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:20,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088332678] [2021-07-09 17:35:20,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088332678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:20,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723500254] [2021-07-09 17:35:20,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:20,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:35:20,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:20,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:20,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:20,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723500254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:20,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:20,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:20,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277113138] [2021-07-09 17:35:20,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:20,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:20,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:20,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:20,277 INFO L87 Difference]: Start difference. First operand 141 states and 306 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:20,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:20,944 INFO L93 Difference]: Finished difference Result 211 states and 433 transitions. [2021-07-09 17:35:20,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:35:20,944 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:20,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:20,944 INFO L225 Difference]: With dead ends: 211 [2021-07-09 17:35:20,944 INFO L226 Difference]: Without dead ends: 211 [2021-07-09 17:35:20,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 621.7ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:35:20,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-09 17:35:20,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 144. [2021-07-09 17:35:20,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.2167832167832167) internal successors, (317), 143 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 317 transitions. [2021-07-09 17:35:20,946 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 317 transitions. Word has length 19 [2021-07-09 17:35:20,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:20,946 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 317 transitions. [2021-07-09 17:35:20,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:20,946 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 317 transitions. [2021-07-09 17:35:20,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:20,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:20,947 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:21,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2508,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:21,165 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:21,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:21,165 INFO L82 PathProgramCache]: Analyzing trace with hash 846724732, now seen corresponding path program 472 times [2021-07-09 17:35:21,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:21,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186015001] [2021-07-09 17:35:21,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:21,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:21,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186015001] [2021-07-09 17:35:21,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186015001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:21,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011456793] [2021-07-09 17:35:21,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:21,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:21,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:21,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:21,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:21,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011456793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:21,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:21,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:21,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929460677] [2021-07-09 17:35:21,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:21,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:21,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:21,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:21,490 INFO L87 Difference]: Start difference. First operand 144 states and 317 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:21,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:21,950 INFO L93 Difference]: Finished difference Result 155 states and 332 transitions. [2021-07-09 17:35:21,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:35:21,950 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:21,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:21,951 INFO L225 Difference]: With dead ends: 155 [2021-07-09 17:35:21,951 INFO L226 Difference]: Without dead ends: 151 [2021-07-09 17:35:21,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 528.2ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:35:21,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-09 17:35:21,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 144. [2021-07-09 17:35:21,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.2097902097902096) internal successors, (316), 143 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:21,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 316 transitions. [2021-07-09 17:35:21,952 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 316 transitions. Word has length 19 [2021-07-09 17:35:21,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:21,952 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 316 transitions. [2021-07-09 17:35:21,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:21,952 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 316 transitions. [2021-07-09 17:35:21,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:21,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:21,953 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:22,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2520,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:22,153 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:22,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:22,153 INFO L82 PathProgramCache]: Analyzing trace with hash 933605966, now seen corresponding path program 473 times [2021-07-09 17:35:22,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:22,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430689431] [2021-07-09 17:35:22,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:22,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:22,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430689431] [2021-07-09 17:35:22,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430689431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:22,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663946429] [2021-07-09 17:35:22,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:22,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:35:22,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:22,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:22,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:22,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663946429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:22,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:22,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:22,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213630699] [2021-07-09 17:35:22,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:22,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:22,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:22,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:22,434 INFO L87 Difference]: Start difference. First operand 144 states and 316 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:22,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:22,871 INFO L93 Difference]: Finished difference Result 186 states and 394 transitions. [2021-07-09 17:35:22,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:35:22,871 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:22,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:22,871 INFO L225 Difference]: With dead ends: 186 [2021-07-09 17:35:22,871 INFO L226 Difference]: Without dead ends: 186 [2021-07-09 17:35:22,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 454.5ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:35:22,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-07-09 17:35:22,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 143. [2021-07-09 17:35:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.211267605633803) internal successors, (314), 142 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 314 transitions. [2021-07-09 17:35:22,873 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 314 transitions. Word has length 19 [2021-07-09 17:35:22,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:22,873 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 314 transitions. [2021-07-09 17:35:22,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:22,873 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 314 transitions. [2021-07-09 17:35:22,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:22,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:22,873 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:23,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2525 [2021-07-09 17:35:23,074 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:23,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:23,074 INFO L82 PathProgramCache]: Analyzing trace with hash 340378466, now seen corresponding path program 474 times [2021-07-09 17:35:23,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:23,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517644670] [2021-07-09 17:35:23,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:23,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:23,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517644670] [2021-07-09 17:35:23,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517644670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:23,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154984851] [2021-07-09 17:35:23,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:23,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:35:23,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:23,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:23,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:23,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154984851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:23,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:23,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:23,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633954352] [2021-07-09 17:35:23,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:23,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:23,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:23,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:23,370 INFO L87 Difference]: Start difference. First operand 143 states and 314 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:23,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:23,588 INFO L93 Difference]: Finished difference Result 153 states and 327 transitions. [2021-07-09 17:35:23,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:35:23,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:23,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:23,588 INFO L225 Difference]: With dead ends: 153 [2021-07-09 17:35:23,588 INFO L226 Difference]: Without dead ends: 147 [2021-07-09 17:35:23,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 290.8ms TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:35:23,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-09 17:35:23,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2021-07-09 17:35:23,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.204225352112676) internal successors, (313), 142 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:23,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 313 transitions. [2021-07-09 17:35:23,590 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 313 transitions. Word has length 19 [2021-07-09 17:35:23,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:23,590 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 313 transitions. [2021-07-09 17:35:23,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:23,590 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 313 transitions. [2021-07-09 17:35:23,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:23,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:23,590 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:23,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2529,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:23,801 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:23,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:23,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1173178154, now seen corresponding path program 475 times [2021-07-09 17:35:23,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:23,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758752658] [2021-07-09 17:35:23,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:23,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:23,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758752658] [2021-07-09 17:35:23,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758752658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:23,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111475531] [2021-07-09 17:35:23,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:23,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:23,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:24,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:24,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:24,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:24,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:24,077 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:35:24,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:35:24,080 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:24,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:24,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:24,086 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:35:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:24,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111475531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:24,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:24,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:35:24,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407972052] [2021-07-09 17:35:24,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:35:24,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:24,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:35:24,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:24,104 INFO L87 Difference]: Start difference. First operand 143 states and 313 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:24,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:24,455 INFO L93 Difference]: Finished difference Result 179 states and 381 transitions. [2021-07-09 17:35:24,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:24,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:24,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:24,456 INFO L225 Difference]: With dead ends: 179 [2021-07-09 17:35:24,456 INFO L226 Difference]: Without dead ends: 179 [2021-07-09 17:35:24,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 397.2ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:35:24,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-07-09 17:35:24,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 142. [2021-07-09 17:35:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.2056737588652484) internal successors, (311), 141 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 311 transitions. [2021-07-09 17:35:24,458 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 311 transitions. Word has length 19 [2021-07-09 17:35:24,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:24,458 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 311 transitions. [2021-07-09 17:35:24,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:24,458 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 311 transitions. [2021-07-09 17:35:24,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:24,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:24,458 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:24,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2533 [2021-07-09 17:35:24,658 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:24,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:24,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1823513404, now seen corresponding path program 476 times [2021-07-09 17:35:24,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:24,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333735442] [2021-07-09 17:35:24,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:24,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:24,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333735442] [2021-07-09 17:35:24,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333735442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:24,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94956175] [2021-07-09 17:35:24,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:24,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:24,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:24,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:24,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:24,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94956175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:24,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:24,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:24,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444456414] [2021-07-09 17:35:24,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:24,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:24,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:24,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:24,913 INFO L87 Difference]: Start difference. First operand 142 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:25,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:25,057 INFO L93 Difference]: Finished difference Result 150 states and 321 transitions. [2021-07-09 17:35:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:35:25,058 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:25,058 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:35:25,058 INFO L226 Difference]: Without dead ends: 142 [2021-07-09 17:35:25,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 203.3ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:25,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-07-09 17:35:25,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-07-09 17:35:25,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.198581560283688) internal successors, (310), 141 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 310 transitions. [2021-07-09 17:35:25,059 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 310 transitions. Word has length 19 [2021-07-09 17:35:25,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:25,059 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 310 transitions. [2021-07-09 17:35:25,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:25,059 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 310 transitions. [2021-07-09 17:35:25,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:25,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:25,060 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:25,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2535 [2021-07-09 17:35:25,260 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:25,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:25,261 INFO L82 PathProgramCache]: Analyzing trace with hash -2058976434, now seen corresponding path program 477 times [2021-07-09 17:35:25,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:25,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298375732] [2021-07-09 17:35:25,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:25,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:25,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298375732] [2021-07-09 17:35:25,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298375732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:25,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823918810] [2021-07-09 17:35:25,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:25,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:35:25,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:25,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:25,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:25,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:25,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823918810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:25,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:25,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:25,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105394526] [2021-07-09 17:35:25,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:25,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:25,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:25,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:25,492 INFO L87 Difference]: Start difference. First operand 142 states and 310 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:25,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:25,633 INFO L93 Difference]: Finished difference Result 159 states and 339 transitions. [2021-07-09 17:35:25,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:35:25,633 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:25,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:25,633 INFO L225 Difference]: With dead ends: 159 [2021-07-09 17:35:25,633 INFO L226 Difference]: Without dead ends: 159 [2021-07-09 17:35:25,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:25,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-07-09 17:35:25,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 136. [2021-07-09 17:35:25,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1703703703703705) internal successors, (293), 135 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:25,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 293 transitions. [2021-07-09 17:35:25,635 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 293 transitions. Word has length 19 [2021-07-09 17:35:25,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:25,635 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 293 transitions. [2021-07-09 17:35:25,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:25,635 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 293 transitions. [2021-07-09 17:35:25,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:25,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:25,635 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:25,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2540 [2021-07-09 17:35:25,836 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:25,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:25,836 INFO L82 PathProgramCache]: Analyzing trace with hash -27202426, now seen corresponding path program 478 times [2021-07-09 17:35:25,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:25,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937615120] [2021-07-09 17:35:25,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:25,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:25,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937615120] [2021-07-09 17:35:25,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937615120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:25,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581508818] [2021-07-09 17:35:25,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:25,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:25,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:25,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:25,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:26,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:26,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:26,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:26,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:26,048 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-07-09 17:35:26,048 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:26,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:26,049 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-07-09 17:35:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:26,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581508818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:26,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:26,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:26,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420773065] [2021-07-09 17:35:26,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:26,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:26,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:26,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:26,065 INFO L87 Difference]: Start difference. First operand 136 states and 293 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:26,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:26,284 INFO L93 Difference]: Finished difference Result 178 states and 377 transitions. [2021-07-09 17:35:26,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:35:26,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:26,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:26,285 INFO L225 Difference]: With dead ends: 178 [2021-07-09 17:35:26,285 INFO L226 Difference]: Without dead ends: 178 [2021-07-09 17:35:26,285 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:35:26,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-07-09 17:35:26,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2021-07-09 17:35:26,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1703703703703705) internal successors, (293), 135 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 293 transitions. [2021-07-09 17:35:26,287 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 293 transitions. Word has length 19 [2021-07-09 17:35:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:26,287 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 293 transitions. [2021-07-09 17:35:26,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:26,287 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 293 transitions. [2021-07-09 17:35:26,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:26,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:26,287 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:26,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2544 [2021-07-09 17:35:26,488 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:26,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:26,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1374926730, now seen corresponding path program 479 times [2021-07-09 17:35:26,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:26,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728146799] [2021-07-09 17:35:26,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:26,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:26,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728146799] [2021-07-09 17:35:26,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728146799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:26,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583176891] [2021-07-09 17:35:26,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:26,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:35:26,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:26,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:26,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:26,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583176891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:26,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:26,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:26,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769479454] [2021-07-09 17:35:26,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:26,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:26,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:26,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:26,716 INFO L87 Difference]: Start difference. First operand 136 states and 293 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:27,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:27,121 INFO L93 Difference]: Finished difference Result 146 states and 308 transitions. [2021-07-09 17:35:27,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:27,122 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:27,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:27,122 INFO L225 Difference]: With dead ends: 146 [2021-07-09 17:35:27,122 INFO L226 Difference]: Without dead ends: 140 [2021-07-09 17:35:27,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 397.0ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:27,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-07-09 17:35:27,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2021-07-09 17:35:27,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1641791044776117) internal successors, (290), 134 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:27,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 290 transitions. [2021-07-09 17:35:27,123 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 290 transitions. Word has length 19 [2021-07-09 17:35:27,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:27,124 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 290 transitions. [2021-07-09 17:35:27,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:27,124 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 290 transitions. [2021-07-09 17:35:27,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:27,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:27,124 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:27,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2545 [2021-07-09 17:35:27,324 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:27,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:27,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1271981482, now seen corresponding path program 480 times [2021-07-09 17:35:27,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:27,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829215788] [2021-07-09 17:35:27,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:27,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:27,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829215788] [2021-07-09 17:35:27,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829215788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:27,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290439906] [2021-07-09 17:35:27,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:27,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:35:27,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:27,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:27,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:27,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:27,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:27,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:27,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:27,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:27,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:27,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:27,550 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:35:27,551 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:27,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:27,551 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:35:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:27,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290439906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:27,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:27,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:27,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251288465] [2021-07-09 17:35:27,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:27,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:27,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:27,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:27,575 INFO L87 Difference]: Start difference. First operand 135 states and 290 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:27,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:27,982 INFO L93 Difference]: Finished difference Result 188 states and 396 transitions. [2021-07-09 17:35:27,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:35:27,982 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:27,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:27,982 INFO L225 Difference]: With dead ends: 188 [2021-07-09 17:35:27,982 INFO L226 Difference]: Without dead ends: 188 [2021-07-09 17:35:27,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 399.6ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:35:27,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-07-09 17:35:27,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 136. [2021-07-09 17:35:27,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.162962962962963) internal successors, (292), 135 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:27,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 292 transitions. [2021-07-09 17:35:27,984 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 292 transitions. Word has length 19 [2021-07-09 17:35:27,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:27,984 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 292 transitions. [2021-07-09 17:35:27,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:27,984 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 292 transitions. [2021-07-09 17:35:27,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:27,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:27,984 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:28,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2549,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:28,185 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:28,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:28,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2058035502, now seen corresponding path program 481 times [2021-07-09 17:35:28,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:28,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145756277] [2021-07-09 17:35:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:28,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:28,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:28,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145756277] [2021-07-09 17:35:28,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145756277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:28,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124243955] [2021-07-09 17:35:28,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:28,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:28,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:28,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124243955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:28,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:28,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:28,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653208475] [2021-07-09 17:35:28,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:28,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:28,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:28,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:28,422 INFO L87 Difference]: Start difference. First operand 136 states and 292 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:28,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:28,906 INFO L93 Difference]: Finished difference Result 176 states and 363 transitions. [2021-07-09 17:35:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:35:28,906 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:28,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:28,907 INFO L225 Difference]: With dead ends: 176 [2021-07-09 17:35:28,907 INFO L226 Difference]: Without dead ends: 173 [2021-07-09 17:35:28,907 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 467.1ms TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:35:28,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-07-09 17:35:28,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 141. [2021-07-09 17:35:28,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1714285714285713) internal successors, (304), 140 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:28,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 304 transitions. [2021-07-09 17:35:28,908 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 304 transitions. Word has length 19 [2021-07-09 17:35:28,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:28,908 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 304 transitions. [2021-07-09 17:35:28,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:28,908 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 304 transitions. [2021-07-09 17:35:28,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:28,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:28,909 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:29,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2553 [2021-07-09 17:35:29,109 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:29,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:29,109 INFO L82 PathProgramCache]: Analyzing trace with hash 2013000326, now seen corresponding path program 482 times [2021-07-09 17:35:29,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:29,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807882776] [2021-07-09 17:35:29,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:29,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:29,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807882776] [2021-07-09 17:35:29,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807882776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:29,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063438520] [2021-07-09 17:35:29,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:29,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:29,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:29,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:29,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:29,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:29,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:29,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:29,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:29,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:29,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:29,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:29,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:29,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:29,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:29,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:29,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:29,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:29,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:29,308 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:29,344 INFO L628 ElimStorePlain]: treesize reduction 73, result has 38.7 percent of original size [2021-07-09 17:35:29,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:29,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:29,348 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:29,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:29,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:29,364 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-07-09 17:35:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:29,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063438520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:29,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:29,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:29,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831654002] [2021-07-09 17:35:29,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:29,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:29,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:29,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:29,404 INFO L87 Difference]: Start difference. First operand 141 states and 304 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:30,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:30,054 INFO L93 Difference]: Finished difference Result 220 states and 454 transitions. [2021-07-09 17:35:30,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:35:30,054 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:30,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:30,054 INFO L225 Difference]: With dead ends: 220 [2021-07-09 17:35:30,054 INFO L226 Difference]: Without dead ends: 220 [2021-07-09 17:35:30,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 607.7ms TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:35:30,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-07-09 17:35:30,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 141. [2021-07-09 17:35:30,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1714285714285713) internal successors, (304), 140 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:30,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 304 transitions. [2021-07-09 17:35:30,056 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 304 transitions. Word has length 19 [2021-07-09 17:35:30,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:30,056 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 304 transitions. [2021-07-09 17:35:30,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:30,056 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 304 transitions. [2021-07-09 17:35:30,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:30,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:30,056 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:30,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2563,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:30,257 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:30,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:30,257 INFO L82 PathProgramCache]: Analyzing trace with hash 602209494, now seen corresponding path program 483 times [2021-07-09 17:35:30,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:30,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337295833] [2021-07-09 17:35:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:30,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:30,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337295833] [2021-07-09 17:35:30,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337295833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:30,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001696748] [2021-07-09 17:35:30,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:30,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:35:30,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:30,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:30,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:30,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:30,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:30,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:30,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:30,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:30,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:30,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:30,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:30,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:30,513 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:35:30,513 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:30,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:30,514 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:35:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:30,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001696748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:30,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:30,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:30,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657090718] [2021-07-09 17:35:30,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:30,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:30,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:30,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:30,540 INFO L87 Difference]: Start difference. First operand 141 states and 304 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:31,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:31,110 INFO L93 Difference]: Finished difference Result 183 states and 385 transitions. [2021-07-09 17:35:31,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:35:31,110 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:31,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:31,111 INFO L225 Difference]: With dead ends: 183 [2021-07-09 17:35:31,111 INFO L226 Difference]: Without dead ends: 181 [2021-07-09 17:35:31,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 539.8ms TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:35:31,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-07-09 17:35:31,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 141. [2021-07-09 17:35:31,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.164285714285714) internal successors, (303), 140 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:31,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 303 transitions. [2021-07-09 17:35:31,112 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 303 transitions. Word has length 19 [2021-07-09 17:35:31,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:31,113 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 303 transitions. [2021-07-09 17:35:31,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:31,113 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 303 transitions. [2021-07-09 17:35:31,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:31,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:31,113 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:31,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2566 [2021-07-09 17:35:31,313 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:31,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:31,313 INFO L82 PathProgramCache]: Analyzing trace with hash -921850230, now seen corresponding path program 484 times [2021-07-09 17:35:31,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:31,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72347444] [2021-07-09 17:35:31,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:31,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:31,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72347444] [2021-07-09 17:35:31,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72347444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:31,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995469221] [2021-07-09 17:35:31,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:31,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:31,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:31,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:31,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:31,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995469221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:31,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:31,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:31,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544525873] [2021-07-09 17:35:31,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:31,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:31,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:31,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:31,573 INFO L87 Difference]: Start difference. First operand 141 states and 303 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:31,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:31,963 INFO L93 Difference]: Finished difference Result 159 states and 338 transitions. [2021-07-09 17:35:31,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:35:31,963 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:31,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:31,963 INFO L225 Difference]: With dead ends: 159 [2021-07-09 17:35:31,963 INFO L226 Difference]: Without dead ends: 159 [2021-07-09 17:35:31,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 383.6ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:31,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-07-09 17:35:31,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 134. [2021-07-09 17:35:31,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1654135338345863) internal successors, (288), 133 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:31,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 288 transitions. [2021-07-09 17:35:31,965 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 288 transitions. Word has length 19 [2021-07-09 17:35:31,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:31,965 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 288 transitions. [2021-07-09 17:35:31,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:31,965 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 288 transitions. [2021-07-09 17:35:31,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:31,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:31,965 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:32,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2577,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:32,166 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:32,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:32,166 INFO L82 PathProgramCache]: Analyzing trace with hash 2137187534, now seen corresponding path program 485 times [2021-07-09 17:35:32,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:32,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141114894] [2021-07-09 17:35:32,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:32,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:32,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141114894] [2021-07-09 17:35:32,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141114894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:32,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474506156] [2021-07-09 17:35:32,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:32,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:35:32,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:32,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:32,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:32,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:32,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:32,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:32,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:32,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:32,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:32,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:32,399 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:35:32,399 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:32,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:32,400 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:35:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:32,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474506156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:32,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:32,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:32,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672481173] [2021-07-09 17:35:32,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:32,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:32,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:32,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:32,414 INFO L87 Difference]: Start difference. First operand 134 states and 288 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:32,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:32,632 INFO L93 Difference]: Finished difference Result 175 states and 370 transitions. [2021-07-09 17:35:32,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:35:32,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:32,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:32,632 INFO L225 Difference]: With dead ends: 175 [2021-07-09 17:35:32,632 INFO L226 Difference]: Without dead ends: 175 [2021-07-09 17:35:32,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 247.1ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:35:32,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-07-09 17:35:32,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 135. [2021-07-09 17:35:32,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1641791044776117) internal successors, (290), 134 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:32,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 290 transitions. [2021-07-09 17:35:32,634 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 290 transitions. Word has length 19 [2021-07-09 17:35:32,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:32,634 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 290 transitions. [2021-07-09 17:35:32,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:32,634 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 290 transitions. [2021-07-09 17:35:32,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:32,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:32,634 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:32,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2587 [2021-07-09 17:35:32,835 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:32,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:32,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1777271016, now seen corresponding path program 486 times [2021-07-09 17:35:32,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:32,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019885198] [2021-07-09 17:35:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:32,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:32,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019885198] [2021-07-09 17:35:32,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019885198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:32,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774761901] [2021-07-09 17:35:32,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:32,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:35:32,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:32,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:32,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:33,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:33,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:33,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:33,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:33,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,087 INFO L628 ElimStorePlain]: treesize reduction 71, result has 39.3 percent of original size [2021-07-09 17:35:33,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:33,091 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:33,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:33,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:33,107 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-07-09 17:35:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:33,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774761901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:33,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:33,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:33,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74274651] [2021-07-09 17:35:33,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:33,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:33,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:33,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:33,146 INFO L87 Difference]: Start difference. First operand 135 states and 290 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:33,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:33,553 INFO L93 Difference]: Finished difference Result 197 states and 415 transitions. [2021-07-09 17:35:33,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:35:33,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:33,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:33,553 INFO L225 Difference]: With dead ends: 197 [2021-07-09 17:35:33,553 INFO L226 Difference]: Without dead ends: 197 [2021-07-09 17:35:33,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 396.4ms TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:35:33,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-09 17:35:33,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 136. [2021-07-09 17:35:33,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.162962962962963) internal successors, (292), 135 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:33,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 292 transitions. [2021-07-09 17:35:33,555 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 292 transitions. Word has length 19 [2021-07-09 17:35:33,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:33,555 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 292 transitions. [2021-07-09 17:35:33,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 292 transitions. [2021-07-09 17:35:33,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:33,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:33,555 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:33,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2591,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:33,756 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:33,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:33,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1807648510, now seen corresponding path program 487 times [2021-07-09 17:35:33,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:33,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45075109] [2021-07-09 17:35:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:33,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:33,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45075109] [2021-07-09 17:35:33,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45075109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:33,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489569437] [2021-07-09 17:35:33,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:33,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:33,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:33,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489569437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:33,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:33,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:33,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399345895] [2021-07-09 17:35:33,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:33,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:33,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:33,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:33,980 INFO L87 Difference]: Start difference. First operand 136 states and 292 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:34,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:34,261 INFO L93 Difference]: Finished difference Result 156 states and 332 transitions. [2021-07-09 17:35:34,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:35:34,261 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:34,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:34,261 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:35:34,262 INFO L226 Difference]: Without dead ends: 156 [2021-07-09 17:35:34,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:35:34,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-09 17:35:34,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 134. [2021-07-09 17:35:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1654135338345863) internal successors, (288), 133 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 288 transitions. [2021-07-09 17:35:34,263 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 288 transitions. Word has length 19 [2021-07-09 17:35:34,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:34,263 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 288 transitions. [2021-07-09 17:35:34,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:34,263 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 288 transitions. [2021-07-09 17:35:34,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:34,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:34,263 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:34,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2594,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:34,464 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:34,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:34,464 INFO L82 PathProgramCache]: Analyzing trace with hash -979582074, now seen corresponding path program 488 times [2021-07-09 17:35:34,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:34,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893879416] [2021-07-09 17:35:34,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:34,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:34,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893879416] [2021-07-09 17:35:34,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893879416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:34,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855975497] [2021-07-09 17:35:34,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:34,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:34,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:34,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:34,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:34,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:34,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:34,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:34,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:34,734 INFO L628 ElimStorePlain]: treesize reduction 78, result has 39.5 percent of original size [2021-07-09 17:35:34,734 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:34,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:34,737 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:34,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:34,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:34,755 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:34,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:34,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:34,769 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-07-09 17:35:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:34,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855975497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:34,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:34,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:34,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548735223] [2021-07-09 17:35:34,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:34,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:34,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:34,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:34,810 INFO L87 Difference]: Start difference. First operand 134 states and 288 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:35,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:35,073 INFO L93 Difference]: Finished difference Result 181 states and 373 transitions. [2021-07-09 17:35:35,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:35:35,073 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:35,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:35,074 INFO L225 Difference]: With dead ends: 181 [2021-07-09 17:35:35,074 INFO L226 Difference]: Without dead ends: 181 [2021-07-09 17:35:35,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 278.9ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:35:35,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-07-09 17:35:35,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 134. [2021-07-09 17:35:35,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1654135338345863) internal successors, (288), 133 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:35,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 288 transitions. [2021-07-09 17:35:35,075 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 288 transitions. Word has length 19 [2021-07-09 17:35:35,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:35,075 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 288 transitions. [2021-07-09 17:35:35,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:35,075 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 288 transitions. [2021-07-09 17:35:35,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:35,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:35,076 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:35,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2604,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:35,276 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:35,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:35,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1030603636, now seen corresponding path program 489 times [2021-07-09 17:35:35,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:35,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896562648] [2021-07-09 17:35:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:35,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:35,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896562648] [2021-07-09 17:35:35,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896562648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:35,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62894321] [2021-07-09 17:35:35,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:35,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:35:35,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:35,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:35,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:35,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62894321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:35,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:35,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:35,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612518008] [2021-07-09 17:35:35,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:35,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:35,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:35,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:35,520 INFO L87 Difference]: Start difference. First operand 134 states and 288 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:35,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:35,854 INFO L93 Difference]: Finished difference Result 220 states and 451 transitions. [2021-07-09 17:35:35,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:35:35,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:35,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:35,855 INFO L225 Difference]: With dead ends: 220 [2021-07-09 17:35:35,855 INFO L226 Difference]: Without dead ends: 220 [2021-07-09 17:35:35,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 307.9ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:35,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-07-09 17:35:35,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 135. [2021-07-09 17:35:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1865671641791047) internal successors, (293), 134 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:35,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 293 transitions. [2021-07-09 17:35:35,857 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 293 transitions. Word has length 19 [2021-07-09 17:35:35,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:35,857 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 293 transitions. [2021-07-09 17:35:35,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:35,857 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 293 transitions. [2021-07-09 17:35:35,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:35,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:35,857 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:36,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2608 [2021-07-09 17:35:36,058 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:36,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:36,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1852517328, now seen corresponding path program 490 times [2021-07-09 17:35:36,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:36,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679478812] [2021-07-09 17:35:36,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:36,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:36,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679478812] [2021-07-09 17:35:36,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679478812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:36,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133913968] [2021-07-09 17:35:36,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:36,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:36,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:36,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:36,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:36,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133913968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:36,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:36,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:36,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484061337] [2021-07-09 17:35:36,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:36,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:36,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:36,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:36,283 INFO L87 Difference]: Start difference. First operand 135 states and 293 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:36,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:36,580 INFO L93 Difference]: Finished difference Result 144 states and 307 transitions. [2021-07-09 17:35:36,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:36,580 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:36,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:36,580 INFO L225 Difference]: With dead ends: 144 [2021-07-09 17:35:36,581 INFO L226 Difference]: Without dead ends: 140 [2021-07-09 17:35:36,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 293.3ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:35:36,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-07-09 17:35:36,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2021-07-09 17:35:36,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1791044776119404) internal successors, (292), 134 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:36,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 292 transitions. [2021-07-09 17:35:36,582 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 292 transitions. Word has length 19 [2021-07-09 17:35:36,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:36,582 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 292 transitions. [2021-07-09 17:35:36,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:36,582 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 292 transitions. [2021-07-09 17:35:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:36,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:36,582 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:36,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2618,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:36,783 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:36,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:36,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1765636094, now seen corresponding path program 491 times [2021-07-09 17:35:36,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:36,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858722428] [2021-07-09 17:35:36,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:36,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:36,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858722428] [2021-07-09 17:35:36,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858722428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:36,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953088098] [2021-07-09 17:35:36,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:36,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:35:36,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:36,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:36,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:36,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:36,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953088098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:36,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:36,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:36,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749883676] [2021-07-09 17:35:36,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:36,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:36,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:36,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:36,992 INFO L87 Difference]: Start difference. First operand 135 states and 292 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:37,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:37,157 INFO L93 Difference]: Finished difference Result 172 states and 363 transitions. [2021-07-09 17:35:37,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:35:37,158 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:37,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:37,158 INFO L225 Difference]: With dead ends: 172 [2021-07-09 17:35:37,158 INFO L226 Difference]: Without dead ends: 172 [2021-07-09 17:35:37,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 180.9ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:37,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-09 17:35:37,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 130. [2021-07-09 17:35:37,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 129 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:37,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-07-09 17:35:37,160 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 19 [2021-07-09 17:35:37,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:37,160 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-07-09 17:35:37,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:37,160 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-07-09 17:35:37,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:37,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:37,160 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:37,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2624 [2021-07-09 17:35:37,360 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:37,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:37,361 INFO L82 PathProgramCache]: Analyzing trace with hash 447244630, now seen corresponding path program 492 times [2021-07-09 17:35:37,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:37,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059296978] [2021-07-09 17:35:37,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:37,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:37,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059296978] [2021-07-09 17:35:37,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059296978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:37,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432319841] [2021-07-09 17:35:37,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:37,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:35:37,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:37,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:37,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:37,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:37,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:37,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:37,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:37,578 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:35:37,578 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:37,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:37,579 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:35:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:37,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432319841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:37,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:37,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:37,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858428669] [2021-07-09 17:35:37,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:37,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:37,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:37,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:37,583 INFO L87 Difference]: Start difference. First operand 130 states and 279 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:37,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:37,800 INFO L93 Difference]: Finished difference Result 171 states and 361 transitions. [2021-07-09 17:35:37,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:35:37,801 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:37,801 INFO L225 Difference]: With dead ends: 171 [2021-07-09 17:35:37,801 INFO L226 Difference]: Without dead ends: 171 [2021-07-09 17:35:37,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 209.0ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:35:37,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-07-09 17:35:37,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 132. [2021-07-09 17:35:37,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1603053435114505) internal successors, (283), 131 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:37,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 283 transitions. [2021-07-09 17:35:37,802 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 283 transitions. Word has length 19 [2021-07-09 17:35:37,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:37,803 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 283 transitions. [2021-07-09 17:35:37,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:37,803 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 283 transitions. [2021-07-09 17:35:37,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:37,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:37,803 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:38,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2628,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:38,003 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:38,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:38,004 INFO L82 PathProgramCache]: Analyzing trace with hash 87328112, now seen corresponding path program 493 times [2021-07-09 17:35:38,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:38,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166737367] [2021-07-09 17:35:38,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:38,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:38,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166737367] [2021-07-09 17:35:38,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166737367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:38,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253667197] [2021-07-09 17:35:38,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:38,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:38,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:38,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:38,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:38,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:38,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:38,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:38,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:38,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:38,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:38,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:38,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:38,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:38,210 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:38,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:38,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:38,213 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:38,242 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:35:38,242 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:38,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:38,243 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:35:38,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:38,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253667197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:38,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:38,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:38,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312787694] [2021-07-09 17:35:38,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:38,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:38,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:38,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:38,276 INFO L87 Difference]: Start difference. First operand 132 states and 283 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:38,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:38,527 INFO L93 Difference]: Finished difference Result 187 states and 394 transitions. [2021-07-09 17:35:38,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:35:38,527 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:38,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:38,528 INFO L225 Difference]: With dead ends: 187 [2021-07-09 17:35:38,528 INFO L226 Difference]: Without dead ends: 187 [2021-07-09 17:35:38,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:35:38,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-07-09 17:35:38,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 133. [2021-07-09 17:35:38,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.159090909090909) internal successors, (285), 132 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:38,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 285 transitions. [2021-07-09 17:35:38,529 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 285 transitions. Word has length 19 [2021-07-09 17:35:38,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:38,529 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 285 transitions. [2021-07-09 17:35:38,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:38,530 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 285 transitions. [2021-07-09 17:35:38,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:38,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:38,530 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:38,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2632 [2021-07-09 17:35:38,730 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:38,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:38,730 INFO L82 PathProgramCache]: Analyzing trace with hash 797375882, now seen corresponding path program 494 times [2021-07-09 17:35:38,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:38,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856446397] [2021-07-09 17:35:38,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:38,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:38,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:38,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856446397] [2021-07-09 17:35:38,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856446397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:38,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979210243] [2021-07-09 17:35:38,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:38,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:38,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:38,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:38,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:38,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:38,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:38,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:38,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:38,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:38,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:38,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:38,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:38,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:38,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:38,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:38,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:38,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:38,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:38,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:38,968 INFO L628 ElimStorePlain]: treesize reduction 59, result has 43.8 percent of original size [2021-07-09 17:35:38,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:38,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:38,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:35:38,972 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:38,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:38,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:35:38,975 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:38,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:38,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:38,993 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-07-09 17:35:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:39,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979210243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:39,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:39,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:39,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468440582] [2021-07-09 17:35:39,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:39,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:39,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:39,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:39,032 INFO L87 Difference]: Start difference. First operand 133 states and 285 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:39,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:39,238 INFO L93 Difference]: Finished difference Result 154 states and 327 transitions. [2021-07-09 17:35:39,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:35:39,238 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:39,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:39,238 INFO L225 Difference]: With dead ends: 154 [2021-07-09 17:35:39,238 INFO L226 Difference]: Without dead ends: 154 [2021-07-09 17:35:39,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 216.5ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:35:39,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-09 17:35:39,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 131. [2021-07-09 17:35:39,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1615384615384614) internal successors, (281), 130 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:39,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 281 transitions. [2021-07-09 17:35:39,242 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 281 transitions. Word has length 19 [2021-07-09 17:35:39,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:39,242 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 281 transitions. [2021-07-09 17:35:39,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:39,242 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 281 transitions. [2021-07-09 17:35:39,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:39,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:39,242 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:39,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2642 [2021-07-09 17:35:39,443 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:39,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:39,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2019456008, now seen corresponding path program 495 times [2021-07-09 17:35:39,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:39,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425268126] [2021-07-09 17:35:39,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:39,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:39,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425268126] [2021-07-09 17:35:39,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425268126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:39,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837075833] [2021-07-09 17:35:39,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:39,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:35:39,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:39,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:39,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:39,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:39,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:39,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:39,656 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:39,690 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:35:39,691 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:39,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:35:39,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:39,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:39,705 INFO L518 ElimStorePlain]: Eliminatee v_prenex_396 vanished before elimination [2021-07-09 17:35:39,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:39,706 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:35:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:39,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837075833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:39,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:39,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:39,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050448786] [2021-07-09 17:35:39,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:39,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:39,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:39,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:39,730 INFO L87 Difference]: Start difference. First operand 131 states and 281 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:40,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:40,026 INFO L93 Difference]: Finished difference Result 172 states and 357 transitions. [2021-07-09 17:35:40,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:40,026 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:40,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:40,027 INFO L225 Difference]: With dead ends: 172 [2021-07-09 17:35:40,027 INFO L226 Difference]: Without dead ends: 172 [2021-07-09 17:35:40,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 312.8ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:35:40,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-09 17:35:40,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 133. [2021-07-09 17:35:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1666666666666665) internal successors, (286), 132 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:40,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 286 transitions. [2021-07-09 17:35:40,028 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 286 transitions. Word has length 19 [2021-07-09 17:35:40,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:40,028 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 286 transitions. [2021-07-09 17:35:40,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:40,028 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 286 transitions. [2021-07-09 17:35:40,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:40,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:40,029 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:40,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2646,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:40,229 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:40,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:40,229 INFO L82 PathProgramCache]: Analyzing trace with hash -659339268, now seen corresponding path program 496 times [2021-07-09 17:35:40,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:40,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473901340] [2021-07-09 17:35:40,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:40,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:40,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473901340] [2021-07-09 17:35:40,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473901340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:40,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322613875] [2021-07-09 17:35:40,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:40,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:40,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:40,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:40,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:40,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322613875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:40,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:40,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:40,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775739965] [2021-07-09 17:35:40,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:40,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:40,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:40,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:40,519 INFO L87 Difference]: Start difference. First operand 133 states and 286 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:40,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:40,862 INFO L93 Difference]: Finished difference Result 212 states and 433 transitions. [2021-07-09 17:35:40,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:35:40,863 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:40,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:40,863 INFO L225 Difference]: With dead ends: 212 [2021-07-09 17:35:40,863 INFO L226 Difference]: Without dead ends: 212 [2021-07-09 17:35:40,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 367.9ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:35:40,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-07-09 17:35:40,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 134. [2021-07-09 17:35:40,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.18796992481203) internal successors, (291), 133 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:40,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 291 transitions. [2021-07-09 17:35:40,865 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 291 transitions. Word has length 19 [2021-07-09 17:35:40,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:40,865 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 291 transitions. [2021-07-09 17:35:40,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:40,865 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 291 transitions. [2021-07-09 17:35:40,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:40,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:40,865 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:41,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2653 [2021-07-09 17:35:41,069 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:41,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:41,069 INFO L82 PathProgramCache]: Analyzing trace with hash 752507064, now seen corresponding path program 497 times [2021-07-09 17:35:41,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:41,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193411642] [2021-07-09 17:35:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:41,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:41,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193411642] [2021-07-09 17:35:41,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193411642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:41,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465685759] [2021-07-09 17:35:41,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:41,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:35:41,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:41,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:41,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:41,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465685759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:41,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:41,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:41,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011483058] [2021-07-09 17:35:41,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:41,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:41,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:41,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:41,305 INFO L87 Difference]: Start difference. First operand 134 states and 291 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:41,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:41,537 INFO L93 Difference]: Finished difference Result 140 states and 299 transitions. [2021-07-09 17:35:41,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:41,538 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:41,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:41,538 INFO L225 Difference]: With dead ends: 140 [2021-07-09 17:35:41,538 INFO L226 Difference]: Without dead ends: 136 [2021-07-09 17:35:41,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 258.1ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:35:41,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-09 17:35:41,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2021-07-09 17:35:41,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.180451127819549) internal successors, (290), 133 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:41,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 290 transitions. [2021-07-09 17:35:41,539 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 290 transitions. Word has length 19 [2021-07-09 17:35:41,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:41,540 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 290 transitions. [2021-07-09 17:35:41,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:41,540 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 290 transitions. [2021-07-09 17:35:41,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:41,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:41,540 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:41,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 498 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2665 [2021-07-09 17:35:41,740 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:41,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:41,741 INFO L82 PathProgramCache]: Analyzing trace with hash 839388298, now seen corresponding path program 498 times [2021-07-09 17:35:41,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:41,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791134626] [2021-07-09 17:35:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:41,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:41,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791134626] [2021-07-09 17:35:41,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791134626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:41,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917577296] [2021-07-09 17:35:41,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:41,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:35:41,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:41,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:41,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:41,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:41,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:41,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:41,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:41,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:41,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:41,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:41,966 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:35:41,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:41,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:35:41,969 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:41,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:41,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:41,981 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:35:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:41,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917577296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:41,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:41,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:41,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514777740] [2021-07-09 17:35:41,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:41,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:41,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:41,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:41,998 INFO L87 Difference]: Start difference. First operand 134 states and 290 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:42,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:42,195 INFO L93 Difference]: Finished difference Result 166 states and 351 transitions. [2021-07-09 17:35:42,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:35:42,195 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:42,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:42,196 INFO L225 Difference]: With dead ends: 166 [2021-07-09 17:35:42,196 INFO L226 Difference]: Without dead ends: 166 [2021-07-09 17:35:42,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 194.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:35:42,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-09 17:35:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2021-07-09 17:35:42,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 129 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:42,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-07-09 17:35:42,197 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 19 [2021-07-09 17:35:42,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:42,197 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-07-09 17:35:42,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:42,197 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-07-09 17:35:42,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:42,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:42,198 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:42,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2669 [2021-07-09 17:35:42,398 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:42,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:42,398 INFO L82 PathProgramCache]: Analyzing trace with hash 739644038, now seen corresponding path program 499 times [2021-07-09 17:35:42,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:42,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367132997] [2021-07-09 17:35:42,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:42,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:42,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:42,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367132997] [2021-07-09 17:35:42,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367132997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:42,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213020036] [2021-07-09 17:35:42,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:42,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:42,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:42,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:42,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:42,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:42,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:42,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:42,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:42,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:42,674 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:35:42,674 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:42,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:35:42,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:42,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:42,688 INFO L518 ElimStorePlain]: Eliminatee v_prenex_400 vanished before elimination [2021-07-09 17:35:42,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:42,689 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:35:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:42,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213020036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:42,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:42,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:42,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255958986] [2021-07-09 17:35:42,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:42,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:42,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:42,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:42,727 INFO L87 Difference]: Start difference. First operand 130 states and 279 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:43,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:43,151 INFO L93 Difference]: Finished difference Result 172 states and 353 transitions. [2021-07-09 17:35:43,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:35:43,152 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:43,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:43,152 INFO L225 Difference]: With dead ends: 172 [2021-07-09 17:35:43,152 INFO L226 Difference]: Without dead ends: 172 [2021-07-09 17:35:43,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 416.3ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:35:43,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-09 17:35:43,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 129. [2021-07-09 17:35:43,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.1640625) internal successors, (277), 128 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:43,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 277 transitions. [2021-07-09 17:35:43,153 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 277 transitions. Word has length 19 [2021-07-09 17:35:43,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:43,154 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 277 transitions. [2021-07-09 17:35:43,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:43,154 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 277 transitions. [2021-07-09 17:35:43,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:43,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:43,154 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:43,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2671,500 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:43,354 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:43,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:43,354 INFO L82 PathProgramCache]: Analyzing trace with hash -133291216, now seen corresponding path program 500 times [2021-07-09 17:35:43,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:43,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373949303] [2021-07-09 17:35:43,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:43,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:43,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373949303] [2021-07-09 17:35:43,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373949303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:43,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391281184] [2021-07-09 17:35:43,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:43,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:43,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:43,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:43,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:43,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391281184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:43,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:43,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:43,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784218198] [2021-07-09 17:35:43,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:43,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:43,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:43,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:43,606 INFO L87 Difference]: Start difference. First operand 129 states and 277 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:44,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:44,009 INFO L93 Difference]: Finished difference Result 140 states and 293 transitions. [2021-07-09 17:35:44,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:44,010 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:44,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:44,010 INFO L225 Difference]: With dead ends: 140 [2021-07-09 17:35:44,010 INFO L226 Difference]: Without dead ends: 136 [2021-07-09 17:35:44,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 402.8ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:35:44,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-09 17:35:44,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2021-07-09 17:35:44,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.15625) internal successors, (276), 128 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:44,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 276 transitions. [2021-07-09 17:35:44,011 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 276 transitions. Word has length 19 [2021-07-09 17:35:44,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:44,011 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 276 transitions. [2021-07-09 17:35:44,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:44,011 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 276 transitions. [2021-07-09 17:35:44,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:44,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:44,012 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:44,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2678,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:44,212 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:44,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:44,212 INFO L82 PathProgramCache]: Analyzing trace with hash -46409982, now seen corresponding path program 501 times [2021-07-09 17:35:44,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:44,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230996491] [2021-07-09 17:35:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:44,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:44,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230996491] [2021-07-09 17:35:44,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230996491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:44,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061658000] [2021-07-09 17:35:44,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:44,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:35:44,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:44,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:44,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:44,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061658000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:44,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:44,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:44,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863519344] [2021-07-09 17:35:44,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:44,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:44,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:44,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:44,434 INFO L87 Difference]: Start difference. First operand 129 states and 276 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:44,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:44,791 INFO L93 Difference]: Finished difference Result 201 states and 419 transitions. [2021-07-09 17:35:44,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:35:44,791 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:44,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:44,791 INFO L225 Difference]: With dead ends: 201 [2021-07-09 17:35:44,791 INFO L226 Difference]: Without dead ends: 201 [2021-07-09 17:35:44,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 333.7ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:35:44,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-07-09 17:35:44,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 130. [2021-07-09 17:35:44,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1705426356589146) internal successors, (280), 129 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:44,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 280 transitions. [2021-07-09 17:35:44,795 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 280 transitions. Word has length 19 [2021-07-09 17:35:44,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:44,795 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 280 transitions. [2021-07-09 17:35:44,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:44,795 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 280 transitions. [2021-07-09 17:35:44,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:44,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:44,796 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:44,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2683 [2021-07-09 17:35:44,996 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:44,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:44,996 INFO L82 PathProgramCache]: Analyzing trace with hash -639637482, now seen corresponding path program 502 times [2021-07-09 17:35:44,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:44,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208297741] [2021-07-09 17:35:44,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:45,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:45,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208297741] [2021-07-09 17:35:45,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208297741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:45,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269647708] [2021-07-09 17:35:45,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:45,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:45,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:45,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:45,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:45,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269647708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:45,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:45,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:45,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620144330] [2021-07-09 17:35:45,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:45,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:45,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:45,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:45,217 INFO L87 Difference]: Start difference. First operand 130 states and 280 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:45,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:45,488 INFO L93 Difference]: Finished difference Result 137 states and 289 transitions. [2021-07-09 17:35:45,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:45,488 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:45,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:45,488 INFO L225 Difference]: With dead ends: 137 [2021-07-09 17:35:45,488 INFO L226 Difference]: Without dead ends: 131 [2021-07-09 17:35:45,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 271.8ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:45,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-09 17:35:45,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2021-07-09 17:35:45,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 129 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:45,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-07-09 17:35:45,490 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 19 [2021-07-09 17:35:45,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:45,490 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-07-09 17:35:45,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-07-09 17:35:45,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:45,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:45,490 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:45,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2687 [2021-07-09 17:35:45,690 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:45,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:45,691 INFO L82 PathProgramCache]: Analyzing trace with hash 2141773194, now seen corresponding path program 503 times [2021-07-09 17:35:45,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:45,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061188376] [2021-07-09 17:35:45,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:45,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:45,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061188376] [2021-07-09 17:35:45,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061188376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:45,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030363496] [2021-07-09 17:35:45,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:45,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:35:45,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:45,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:45,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:45,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030363496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:45,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:45,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:45,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430169648] [2021-07-09 17:35:45,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:45,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:45,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:45,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:45,916 INFO L87 Difference]: Start difference. First operand 130 states and 279 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:46,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:46,116 INFO L93 Difference]: Finished difference Result 168 states and 356 transitions. [2021-07-09 17:35:46,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:46,117 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:46,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:46,117 INFO L225 Difference]: With dead ends: 168 [2021-07-09 17:35:46,117 INFO L226 Difference]: Without dead ends: 168 [2021-07-09 17:35:46,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:46,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-09 17:35:46,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2021-07-09 17:35:46,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.153225806451613) internal successors, (267), 124 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 267 transitions. [2021-07-09 17:35:46,119 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 267 transitions. Word has length 19 [2021-07-09 17:35:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:46,119 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 267 transitions. [2021-07-09 17:35:46,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 267 transitions. [2021-07-09 17:35:46,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:46,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:46,119 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:46,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2692,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:46,319 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:46,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:46,320 INFO L82 PathProgramCache]: Analyzing trace with hash -401377842, now seen corresponding path program 504 times [2021-07-09 17:35:46,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:46,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85505357] [2021-07-09 17:35:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:46,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:46,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85505357] [2021-07-09 17:35:46,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85505357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:46,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663669068] [2021-07-09 17:35:46,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:46,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:35:46,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:46,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:46,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:46,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:46,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:46,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,559 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-07-09 17:35:46,559 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:46,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,559 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-07-09 17:35:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:46,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663669068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:46,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:46,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:46,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043210012] [2021-07-09 17:35:46,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:46,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:46,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:46,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:46,575 INFO L87 Difference]: Start difference. First operand 125 states and 267 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:46,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:46,867 INFO L93 Difference]: Finished difference Result 167 states and 351 transitions. [2021-07-09 17:35:46,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:35:46,867 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:46,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:46,867 INFO L225 Difference]: With dead ends: 167 [2021-07-09 17:35:46,868 INFO L226 Difference]: Without dead ends: 167 [2021-07-09 17:35:46,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 266.4ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:46,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-09 17:35:46,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 126. [2021-07-09 17:35:46,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.152) internal successors, (269), 125 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:46,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 269 transitions. [2021-07-09 17:35:46,869 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 269 transitions. Word has length 19 [2021-07-09 17:35:46,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:46,869 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 269 transitions. [2021-07-09 17:35:46,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:46,869 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 269 transitions. [2021-07-09 17:35:46,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:46,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:46,869 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:47,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2696 [2021-07-09 17:35:47,070 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:47,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:47,070 INFO L82 PathProgramCache]: Analyzing trace with hash -761294360, now seen corresponding path program 505 times [2021-07-09 17:35:47,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:47,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438195369] [2021-07-09 17:35:47,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:47,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:47,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438195369] [2021-07-09 17:35:47,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438195369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:47,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327754988] [2021-07-09 17:35:47,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:47,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:47,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:47,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:47,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:47,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:47,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:47,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:47,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:47,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:47,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:47,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:47,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:47,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:47,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:47,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:47,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:47,308 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:47,338 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:35:47,338 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:47,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:47,338 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:35:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:47,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327754988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:47,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:47,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:47,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207592302] [2021-07-09 17:35:47,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:47,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:47,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:47,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:47,373 INFO L87 Difference]: Start difference. First operand 126 states and 269 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:47,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:47,688 INFO L93 Difference]: Finished difference Result 183 states and 384 transitions. [2021-07-09 17:35:47,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:35:47,688 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:47,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:47,688 INFO L225 Difference]: With dead ends: 183 [2021-07-09 17:35:47,688 INFO L226 Difference]: Without dead ends: 183 [2021-07-09 17:35:47,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 284.1ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:47,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-09 17:35:47,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 127. [2021-07-09 17:35:47,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.1507936507936507) internal successors, (271), 126 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:47,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 271 transitions. [2021-07-09 17:35:47,690 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 271 transitions. Word has length 19 [2021-07-09 17:35:47,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:47,690 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 271 transitions. [2021-07-09 17:35:47,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:47,690 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 271 transitions. [2021-07-09 17:35:47,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:47,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:47,690 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:47,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2697 [2021-07-09 17:35:47,891 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:47,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:47,891 INFO L82 PathProgramCache]: Analyzing trace with hash -51246590, now seen corresponding path program 506 times [2021-07-09 17:35:47,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:47,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744405951] [2021-07-09 17:35:47,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:47,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:47,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744405951] [2021-07-09 17:35:47,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744405951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:47,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154225869] [2021-07-09 17:35:47,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:48,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:48,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:48,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:48,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:48,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:48,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:48,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:48,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:48,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,139 INFO L628 ElimStorePlain]: treesize reduction 65, result has 38.1 percent of original size [2021-07-09 17:35:48,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:35:48,143 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:48,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:48,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:48,158 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-07-09 17:35:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:48,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154225869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:48,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:48,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:48,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446075304] [2021-07-09 17:35:48,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:48,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:48,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:48,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:48,197 INFO L87 Difference]: Start difference. First operand 127 states and 271 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:48,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:48,424 INFO L93 Difference]: Finished difference Result 150 states and 317 transitions. [2021-07-09 17:35:48,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:35:48,424 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:48,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:48,424 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:35:48,424 INFO L226 Difference]: Without dead ends: 150 [2021-07-09 17:35:48,424 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:35:48,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-07-09 17:35:48,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 125. [2021-07-09 17:35:48,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.153225806451613) internal successors, (267), 124 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:48,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 267 transitions. [2021-07-09 17:35:48,426 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 267 transitions. Word has length 19 [2021-07-09 17:35:48,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:48,426 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 267 transitions. [2021-07-09 17:35:48,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:48,426 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 267 transitions. [2021-07-09 17:35:48,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:48,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:48,426 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:48,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2707,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:48,629 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:48,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:48,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1426888816, now seen corresponding path program 507 times [2021-07-09 17:35:48,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:48,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404374009] [2021-07-09 17:35:48,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:48,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:48,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404374009] [2021-07-09 17:35:48,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404374009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:48,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574521316] [2021-07-09 17:35:48,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:48,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:35:48,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:48,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:48,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:48,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:48,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:48,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,886 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:35:48,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:35:48,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:48,900 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:48,900 INFO L518 ElimStorePlain]: Eliminatee v_prenex_403 vanished before elimination [2021-07-09 17:35:48,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:48,901 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:35:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:48,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574521316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:48,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:48,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:48,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134601489] [2021-07-09 17:35:48,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:48,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:48,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:48,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:48,927 INFO L87 Difference]: Start difference. First operand 125 states and 267 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:49,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:49,249 INFO L93 Difference]: Finished difference Result 168 states and 346 transitions. [2021-07-09 17:35:49,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:35:49,249 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:49,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:49,250 INFO L225 Difference]: With dead ends: 168 [2021-07-09 17:35:49,250 INFO L226 Difference]: Without dead ends: 168 [2021-07-09 17:35:49,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 335.0ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:49,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-09 17:35:49,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2021-07-09 17:35:49,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.153225806451613) internal successors, (267), 124 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:49,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 267 transitions. [2021-07-09 17:35:49,251 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 267 transitions. Word has length 19 [2021-07-09 17:35:49,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:49,251 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 267 transitions. [2021-07-09 17:35:49,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:49,252 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 267 transitions. [2021-07-09 17:35:49,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:49,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:49,252 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:49,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2711,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:49,452 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:49,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:49,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1507961740, now seen corresponding path program 508 times [2021-07-09 17:35:49,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:49,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846355343] [2021-07-09 17:35:49,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:49,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:49,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846355343] [2021-07-09 17:35:49,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846355343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:49,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540594229] [2021-07-09 17:35:49,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:49,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:49,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:49,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:49,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:49,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540594229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:49,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:49,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:49,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037750957] [2021-07-09 17:35:49,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:49,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:49,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:49,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:49,691 INFO L87 Difference]: Start difference. First operand 125 states and 267 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:50,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:50,045 INFO L93 Difference]: Finished difference Result 210 states and 427 transitions. [2021-07-09 17:35:50,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:35:50,046 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:50,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:50,046 INFO L225 Difference]: With dead ends: 210 [2021-07-09 17:35:50,046 INFO L226 Difference]: Without dead ends: 210 [2021-07-09 17:35:50,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 363.0ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:35:50,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-07-09 17:35:50,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 126. [2021-07-09 17:35:50,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.176) internal successors, (272), 125 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:50,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 272 transitions. [2021-07-09 17:35:50,048 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 272 transitions. Word has length 19 [2021-07-09 17:35:50,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:50,048 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 272 transitions. [2021-07-09 17:35:50,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:50,048 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 272 transitions. [2021-07-09 17:35:50,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:50,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:50,048 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:50,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2718,509 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:50,249 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:50,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:50,249 INFO L82 PathProgramCache]: Analyzing trace with hash -96115408, now seen corresponding path program 509 times [2021-07-09 17:35:50,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:50,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349368390] [2021-07-09 17:35:50,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:50,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:50,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349368390] [2021-07-09 17:35:50,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349368390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:50,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481156051] [2021-07-09 17:35:50,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:50,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:35:50,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:50,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:50,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:50,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481156051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:50,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:50,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:50,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364655108] [2021-07-09 17:35:50,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:50,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:50,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:50,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:50,485 INFO L87 Difference]: Start difference. First operand 126 states and 272 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:50,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:50,804 INFO L93 Difference]: Finished difference Result 134 states and 284 transitions. [2021-07-09 17:35:50,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:50,804 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:50,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:50,805 INFO L225 Difference]: With dead ends: 134 [2021-07-09 17:35:50,805 INFO L226 Difference]: Without dead ends: 130 [2021-07-09 17:35:50,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 335.0ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:35:50,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-07-09 17:35:50,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2021-07-09 17:35:50,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.168) internal successors, (271), 125 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:50,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 271 transitions. [2021-07-09 17:35:50,806 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 271 transitions. Word has length 19 [2021-07-09 17:35:50,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:50,806 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 271 transitions. [2021-07-09 17:35:50,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:50,806 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 271 transitions. [2021-07-09 17:35:50,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:50,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:50,806 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:51,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2728,510 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:51,007 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:51,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:51,007 INFO L82 PathProgramCache]: Analyzing trace with hash -9234174, now seen corresponding path program 510 times [2021-07-09 17:35:51,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:51,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062830511] [2021-07-09 17:35:51,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:51,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:51,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062830511] [2021-07-09 17:35:51,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062830511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:51,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548668876] [2021-07-09 17:35:51,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:51,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:35:51,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:51,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:51,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:51,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:51,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:51,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,254 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:35:51,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:35:51,256 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:51,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:51,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,262 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:35:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:51,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548668876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:51,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:51,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:51,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841546335] [2021-07-09 17:35:51,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:51,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:51,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:51,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:51,280 INFO L87 Difference]: Start difference. First operand 126 states and 271 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:51,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:51,493 INFO L93 Difference]: Finished difference Result 155 states and 326 transitions. [2021-07-09 17:35:51,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:35:51,493 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:51,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:51,493 INFO L225 Difference]: With dead ends: 155 [2021-07-09 17:35:51,493 INFO L226 Difference]: Without dead ends: 155 [2021-07-09 17:35:51,493 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 256.4ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:35:51,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-07-09 17:35:51,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 122. [2021-07-09 17:35:51,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1487603305785123) internal successors, (260), 121 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:51,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 260 transitions. [2021-07-09 17:35:51,495 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 260 transitions. Word has length 19 [2021-07-09 17:35:51,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:51,495 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 260 transitions. [2021-07-09 17:35:51,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:51,495 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 260 transitions. [2021-07-09 17:35:51,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:51,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:51,495 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:51,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2734,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:51,695 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:51,696 INFO L82 PathProgramCache]: Analyzing trace with hash -108978434, now seen corresponding path program 511 times [2021-07-09 17:35:51,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:51,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890865129] [2021-07-09 17:35:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:51,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:51,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890865129] [2021-07-09 17:35:51,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890865129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:51,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001609228] [2021-07-09 17:35:51,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:51,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:51,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:51,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:51,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:51,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,973 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:35:51,973 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:51,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:35:51,975 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:51,987 INFO L518 ElimStorePlain]: Eliminatee v_prenex_408 vanished before elimination [2021-07-09 17:35:51,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:51,987 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:35:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:52,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001609228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:52,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:52,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:52,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841829506] [2021-07-09 17:35:52,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:52,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:52,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:52,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:52,026 INFO L87 Difference]: Start difference. First operand 122 states and 260 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:52,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:52,387 INFO L93 Difference]: Finished difference Result 152 states and 312 transitions. [2021-07-09 17:35:52,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:35:52,387 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:52,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:52,388 INFO L225 Difference]: With dead ends: 152 [2021-07-09 17:35:52,388 INFO L226 Difference]: Without dead ends: 152 [2021-07-09 17:35:52,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 379.5ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:35:52,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-07-09 17:35:52,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 125. [2021-07-09 17:35:52,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.161290322580645) internal successors, (268), 124 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:52,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 268 transitions. [2021-07-09 17:35:52,389 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 268 transitions. Word has length 19 [2021-07-09 17:35:52,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:52,389 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 268 transitions. [2021-07-09 17:35:52,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:52,389 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 268 transitions. [2021-07-09 17:35:52,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:52,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:52,389 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:52,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2736 [2021-07-09 17:35:52,590 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:52,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:52,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1251138306, now seen corresponding path program 512 times [2021-07-09 17:35:52,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:52,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614552433] [2021-07-09 17:35:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:52,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:52,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614552433] [2021-07-09 17:35:52,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614552433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:52,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398575265] [2021-07-09 17:35:52,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:52,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:52,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:52,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:52,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:52,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:52,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:52,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:52,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:52,852 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-07-09 17:35:52,852 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:52,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:52,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:52,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:52,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:52,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:35:52,873 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:52,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:52,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:52,888 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:35:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:52,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398575265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:52,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:52,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:52,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280147593] [2021-07-09 17:35:52,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:52,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:52,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:52,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:52,928 INFO L87 Difference]: Start difference. First operand 125 states and 268 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:53,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:53,289 INFO L93 Difference]: Finished difference Result 199 states and 404 transitions. [2021-07-09 17:35:53,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:35:53,289 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:53,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:53,290 INFO L225 Difference]: With dead ends: 199 [2021-07-09 17:35:53,290 INFO L226 Difference]: Without dead ends: 199 [2021-07-09 17:35:53,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 344.7ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:53,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-09 17:35:53,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 127. [2021-07-09 17:35:53,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.1904761904761907) internal successors, (276), 126 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:53,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 276 transitions. [2021-07-09 17:35:53,291 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 276 transitions. Word has length 19 [2021-07-09 17:35:53,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:53,291 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 276 transitions. [2021-07-09 17:35:53,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:53,291 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 276 transitions. [2021-07-09 17:35:53,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:53,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:53,292 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:53,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 513 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2743 [2021-07-09 17:35:53,492 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:53,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:53,492 INFO L82 PathProgramCache]: Analyzing trace with hash -981913688, now seen corresponding path program 513 times [2021-07-09 17:35:53,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:53,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368124841] [2021-07-09 17:35:53,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:53,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:53,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368124841] [2021-07-09 17:35:53,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368124841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:53,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184075474] [2021-07-09 17:35:53,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:53,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:35:53,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:53,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:53,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:53,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184075474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:53,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:53,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:53,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836812405] [2021-07-09 17:35:53,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:53,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:53,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:53,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:53,738 INFO L87 Difference]: Start difference. First operand 127 states and 276 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:54,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:54,078 INFO L93 Difference]: Finished difference Result 135 states and 286 transitions. [2021-07-09 17:35:54,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:35:54,078 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:54,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:54,079 INFO L225 Difference]: With dead ends: 135 [2021-07-09 17:35:54,079 INFO L226 Difference]: Without dead ends: 131 [2021-07-09 17:35:54,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 359.2ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:35:54,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-09 17:35:54,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-07-09 17:35:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.1825396825396823) internal successors, (275), 126 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:54,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 275 transitions. [2021-07-09 17:35:54,080 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 275 transitions. Word has length 19 [2021-07-09 17:35:54,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:54,080 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 275 transitions. [2021-07-09 17:35:54,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:54,080 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 275 transitions. [2021-07-09 17:35:54,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:54,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:54,080 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:54,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2747,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:54,281 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:54,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:54,281 INFO L82 PathProgramCache]: Analyzing trace with hash -895032454, now seen corresponding path program 514 times [2021-07-09 17:35:54,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:54,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187490773] [2021-07-09 17:35:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:54,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:54,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187490773] [2021-07-09 17:35:54,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187490773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:54,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824044185] [2021-07-09 17:35:54,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:54,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:54,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:54,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:54,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:54,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:54,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:54,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,531 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:35:54,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:35:54,534 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:54,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:54,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,539 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:35:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:54,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824044185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:54,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:54,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:54,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459124987] [2021-07-09 17:35:54,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:54,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:54,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:54,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:54,557 INFO L87 Difference]: Start difference. First operand 127 states and 275 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:54,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:54,884 INFO L93 Difference]: Finished difference Result 162 states and 341 transitions. [2021-07-09 17:35:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:35:54,884 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:54,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:54,885 INFO L225 Difference]: With dead ends: 162 [2021-07-09 17:35:54,885 INFO L226 Difference]: Without dead ends: 162 [2021-07-09 17:35:54,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 351.9ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:35:54,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-07-09 17:35:54,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 126. [2021-07-09 17:35:54,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.184) internal successors, (273), 125 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 273 transitions. [2021-07-09 17:35:54,886 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 273 transitions. Word has length 19 [2021-07-09 17:35:54,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:54,886 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 273 transitions. [2021-07-09 17:35:54,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:54,886 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 273 transitions. [2021-07-09 17:35:54,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:54,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:54,887 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:55,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 515 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2752 [2021-07-09 17:35:55,087 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:55,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:55,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1488259954, now seen corresponding path program 515 times [2021-07-09 17:35:55,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:55,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177307698] [2021-07-09 17:35:55,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:55,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:55,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177307698] [2021-07-09 17:35:55,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177307698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:55,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191807429] [2021-07-09 17:35:55,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:55,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:35:55,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:55,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:55,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:55,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191807429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:55,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:55,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:55,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249892244] [2021-07-09 17:35:55,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:55,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:55,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:55,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:55,315 INFO L87 Difference]: Start difference. First operand 126 states and 273 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:55,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:55,580 INFO L93 Difference]: Finished difference Result 132 states and 280 transitions. [2021-07-09 17:35:55,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:35:55,580 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:55,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:55,580 INFO L225 Difference]: With dead ends: 132 [2021-07-09 17:35:55,581 INFO L226 Difference]: Without dead ends: 126 [2021-07-09 17:35:55,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 284.2ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:55,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-09 17:35:55,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-07-09 17:35:55,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.176) internal successors, (272), 125 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 272 transitions. [2021-07-09 17:35:55,582 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 272 transitions. Word has length 19 [2021-07-09 17:35:55,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:55,582 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 272 transitions. [2021-07-09 17:35:55,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:55,582 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 272 transitions. [2021-07-09 17:35:55,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:55,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:55,582 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:55,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2754,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:55,783 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:55,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:55,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1293150722, now seen corresponding path program 516 times [2021-07-09 17:35:55,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:55,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215109225] [2021-07-09 17:35:55,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:55,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:55,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:55,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215109225] [2021-07-09 17:35:55,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215109225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:55,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931999037] [2021-07-09 17:35:55,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:55,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:35:55,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:55,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:55,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:56,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:56,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:56,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,033 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:35:56,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:35:56,036 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:56,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:56,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,042 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:35:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:56,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931999037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:56,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:56,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:56,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854428202] [2021-07-09 17:35:56,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:56,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:56,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:56,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:56,063 INFO L87 Difference]: Start difference. First operand 126 states and 272 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:56,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:56,213 INFO L93 Difference]: Finished difference Result 153 states and 322 transitions. [2021-07-09 17:35:56,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:56,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:56,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:56,213 INFO L225 Difference]: With dead ends: 153 [2021-07-09 17:35:56,213 INFO L226 Difference]: Without dead ends: 153 [2021-07-09 17:35:56,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-09 17:35:56,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 121. [2021-07-09 17:35:56,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.15) internal successors, (258), 120 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 258 transitions. [2021-07-09 17:35:56,215 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 258 transitions. Word has length 19 [2021-07-09 17:35:56,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:56,215 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 258 transitions. [2021-07-09 17:35:56,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:56,215 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 258 transitions. [2021-07-09 17:35:56,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:56,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:56,215 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:56,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2760 [2021-07-09 17:35:56,415 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:56,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:56,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1574989870, now seen corresponding path program 517 times [2021-07-09 17:35:56,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:56,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014156059] [2021-07-09 17:35:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:56,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:56,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014156059] [2021-07-09 17:35:56,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014156059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:56,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910893894] [2021-07-09 17:35:56,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:56,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:56,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:56,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910893894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:56,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:56,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:56,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640822119] [2021-07-09 17:35:56,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:56,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:56,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:56,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:56,707 INFO L87 Difference]: Start difference. First operand 121 states and 258 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:57,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:57,157 INFO L93 Difference]: Finished difference Result 170 states and 347 transitions. [2021-07-09 17:35:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:35:57,157 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:57,157 INFO L225 Difference]: With dead ends: 170 [2021-07-09 17:35:57,157 INFO L226 Difference]: Without dead ends: 167 [2021-07-09 17:35:57,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 454.5ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:35:57,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-09 17:35:57,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 132. [2021-07-09 17:35:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.198473282442748) internal successors, (288), 131 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:57,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 288 transitions. [2021-07-09 17:35:57,159 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 288 transitions. Word has length 19 [2021-07-09 17:35:57,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:57,159 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 288 transitions. [2021-07-09 17:35:57,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:57,159 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 288 transitions. [2021-07-09 17:35:57,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:57,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:57,159 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:57,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 518 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2762 [2021-07-09 17:35:57,360 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:57,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:57,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1798921338, now seen corresponding path program 518 times [2021-07-09 17:35:57,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:57,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210234803] [2021-07-09 17:35:57,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:57,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:57,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210234803] [2021-07-09 17:35:57,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210234803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:57,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941807167] [2021-07-09 17:35:57,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:57,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:57,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:57,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:57,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:57,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:57,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:57,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:57,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:57,694 INFO L628 ElimStorePlain]: treesize reduction 78, result has 40.5 percent of original size [2021-07-09 17:35:57,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:35:57,697 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:57,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:57,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:57,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:35:57,714 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:35:57,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:57,728 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:57,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:57,729 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-07-09 17:35:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:57,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941807167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:57,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:57,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:35:57,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303213371] [2021-07-09 17:35:57,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:57,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:57,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:57,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:57,776 INFO L87 Difference]: Start difference. First operand 132 states and 288 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:57,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:57,984 INFO L93 Difference]: Finished difference Result 162 states and 337 transitions. [2021-07-09 17:35:57,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:35:57,985 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:57,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:57,985 INFO L225 Difference]: With dead ends: 162 [2021-07-09 17:35:57,985 INFO L226 Difference]: Without dead ends: 162 [2021-07-09 17:35:57,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 266.1ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:57,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-07-09 17:35:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 132. [2021-07-09 17:35:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.198473282442748) internal successors, (288), 131 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 288 transitions. [2021-07-09 17:35:57,986 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 288 transitions. Word has length 19 [2021-07-09 17:35:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:57,986 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 288 transitions. [2021-07-09 17:35:57,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:57,987 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 288 transitions. [2021-07-09 17:35:57,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:57,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:57,987 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:58,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2773 [2021-07-09 17:35:58,187 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:58,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:58,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1085255126, now seen corresponding path program 519 times [2021-07-09 17:35:58,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:58,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820722391] [2021-07-09 17:35:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:58,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:58,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820722391] [2021-07-09 17:35:58,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820722391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:58,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999375666] [2021-07-09 17:35:58,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:58,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:35:58,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:58,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:58,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:58,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:58,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:58,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:58,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:58,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:58,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,517 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:35:58,517 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:35:58,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:35:58,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:58,531 INFO L518 ElimStorePlain]: Eliminatee v_prenex_420 vanished before elimination [2021-07-09 17:35:58,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:58,531 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:35:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:58,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999375666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:58,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:58,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:58,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108932869] [2021-07-09 17:35:58,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:58,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:58,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:58,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:58,560 INFO L87 Difference]: Start difference. First operand 132 states and 288 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:59,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:59,095 INFO L93 Difference]: Finished difference Result 164 states and 338 transitions. [2021-07-09 17:35:59,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:35:59,096 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:35:59,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:59,096 INFO L225 Difference]: With dead ends: 164 [2021-07-09 17:35:59,096 INFO L226 Difference]: Without dead ends: 162 [2021-07-09 17:35:59,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 512.0ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:35:59,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-07-09 17:35:59,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 132. [2021-07-09 17:35:59,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1908396946564888) internal successors, (287), 131 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:59,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 287 transitions. [2021-07-09 17:35:59,097 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 287 transitions. Word has length 19 [2021-07-09 17:35:59,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:59,097 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 287 transitions. [2021-07-09 17:35:59,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:59,098 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 287 transitions. [2021-07-09 17:35:59,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:35:59,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:59,098 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:59,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2779,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:59,298 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:59,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:59,298 INFO L82 PathProgramCache]: Analyzing trace with hash -438804598, now seen corresponding path program 520 times [2021-07-09 17:35:59,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:59,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441439920] [2021-07-09 17:35:59,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:59,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:59,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441439920] [2021-07-09 17:35:59,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441439920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:59,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958810975] [2021-07-09 17:35:59,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:59,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:59,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:59,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:35:59,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:59,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958810975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:59,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:59,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:35:59,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337155086] [2021-07-09 17:35:59,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:59,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:59,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:59,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:59,574 INFO L87 Difference]: Start difference. First operand 132 states and 287 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:00,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:00,038 INFO L93 Difference]: Finished difference Result 177 states and 363 transitions. [2021-07-09 17:36:00,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:36:00,038 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:00,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:00,039 INFO L225 Difference]: With dead ends: 177 [2021-07-09 17:36:00,039 INFO L226 Difference]: Without dead ends: 177 [2021-07-09 17:36:00,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 433.6ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:36:00,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-07-09 17:36:00,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2021-07-09 17:36:00,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1923076923076925) internal successors, (285), 130 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 285 transitions. [2021-07-09 17:36:00,040 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 285 transitions. Word has length 19 [2021-07-09 17:36:00,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:00,040 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 285 transitions. [2021-07-09 17:36:00,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:00,040 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 285 transitions. [2021-07-09 17:36:00,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:00,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:00,041 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:00,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2787 [2021-07-09 17:36:00,241 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:00,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:00,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1623110704, now seen corresponding path program 521 times [2021-07-09 17:36:00,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:00,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423420051] [2021-07-09 17:36:00,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:00,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:00,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423420051] [2021-07-09 17:36:00,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423420051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:00,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629478086] [2021-07-09 17:36:00,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:00,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:36:00,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:00,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:00,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:00,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629478086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:00,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:00,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:00,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625463972] [2021-07-09 17:36:00,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:00,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:00,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:00,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:00,541 INFO L87 Difference]: Start difference. First operand 131 states and 285 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:00,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:00,973 INFO L93 Difference]: Finished difference Result 142 states and 300 transitions. [2021-07-09 17:36:00,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:36:00,973 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:00,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:00,973 INFO L225 Difference]: With dead ends: 142 [2021-07-09 17:36:00,973 INFO L226 Difference]: Without dead ends: 138 [2021-07-09 17:36:00,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 459.5ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:00,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-09 17:36:00,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 131. [2021-07-09 17:36:00,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1846153846153844) internal successors, (284), 130 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:00,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 284 transitions. [2021-07-09 17:36:00,975 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 284 transitions. Word has length 19 [2021-07-09 17:36:00,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:00,975 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 284 transitions. [2021-07-09 17:36:00,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:00,975 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 284 transitions. [2021-07-09 17:36:00,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:00,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:00,975 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:01,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2799,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:01,176 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:01,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:01,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1709991938, now seen corresponding path program 522 times [2021-07-09 17:36:01,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:01,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421705434] [2021-07-09 17:36:01,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:01,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:01,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421705434] [2021-07-09 17:36:01,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421705434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:01,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83900936] [2021-07-09 17:36:01,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:01,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:36:01,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:01,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:01,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:01,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:01,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:01,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,442 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:36:01,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:36:01,445 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:01,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:01,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,451 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:36:01,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:01,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83900936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:01,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:01,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:01,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059659019] [2021-07-09 17:36:01,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:01,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:01,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:01,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:01,470 INFO L87 Difference]: Start difference. First operand 131 states and 284 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:01,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:01,897 INFO L93 Difference]: Finished difference Result 173 states and 362 transitions. [2021-07-09 17:36:01,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:36:01,897 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:01,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:01,897 INFO L225 Difference]: With dead ends: 173 [2021-07-09 17:36:01,897 INFO L226 Difference]: Without dead ends: 173 [2021-07-09 17:36:01,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 389.7ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:36:01,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-07-09 17:36:01,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 130. [2021-07-09 17:36:01,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.186046511627907) internal successors, (282), 129 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:01,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 282 transitions. [2021-07-09 17:36:01,899 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 282 transitions. Word has length 19 [2021-07-09 17:36:01,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:01,899 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 282 transitions. [2021-07-09 17:36:01,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:01,899 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 282 transitions. [2021-07-09 17:36:01,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:01,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:01,899 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:02,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2804,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:02,100 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:02,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:02,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1116764438, now seen corresponding path program 523 times [2021-07-09 17:36:02,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:02,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370924272] [2021-07-09 17:36:02,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:02,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:02,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370924272] [2021-07-09 17:36:02,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370924272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:02,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377443202] [2021-07-09 17:36:02,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:02,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:02,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:02,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:02,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377443202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:02,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:02,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:02,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364724548] [2021-07-09 17:36:02,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:02,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:02,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:02,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:02,374 INFO L87 Difference]: Start difference. First operand 130 states and 282 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:02,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:02,757 INFO L93 Difference]: Finished difference Result 140 states and 295 transitions. [2021-07-09 17:36:02,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:02,758 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:02,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:02,758 INFO L225 Difference]: With dead ends: 140 [2021-07-09 17:36:02,758 INFO L226 Difference]: Without dead ends: 134 [2021-07-09 17:36:02,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 411.2ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:02,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-09 17:36:02,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2021-07-09 17:36:02,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1782945736434107) internal successors, (281), 129 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 281 transitions. [2021-07-09 17:36:02,759 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 281 transitions. Word has length 19 [2021-07-09 17:36:02,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:02,759 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 281 transitions. [2021-07-09 17:36:02,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:02,759 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 281 transitions. [2021-07-09 17:36:02,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:02,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:02,760 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:02,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2806,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:02,960 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:02,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:02,960 INFO L82 PathProgramCache]: Analyzing trace with hash -396792182, now seen corresponding path program 524 times [2021-07-09 17:36:02,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:02,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530889459] [2021-07-09 17:36:02,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:03,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:03,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530889459] [2021-07-09 17:36:03,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530889459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:03,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100172696] [2021-07-09 17:36:03,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:03,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:03,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:03,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:03,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:03,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:03,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:03,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:03,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:03,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:03,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:03,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:03,213 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:36:03,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:03,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:36:03,215 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:03,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:03,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:03,221 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:36:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:03,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100172696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:03,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:03,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:03,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77013258] [2021-07-09 17:36:03,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:03,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:03,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:03,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:03,243 INFO L87 Difference]: Start difference. First operand 130 states and 281 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:03,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:03,592 INFO L93 Difference]: Finished difference Result 166 states and 349 transitions. [2021-07-09 17:36:03,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:36:03,593 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:03,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:03,593 INFO L225 Difference]: With dead ends: 166 [2021-07-09 17:36:03,593 INFO L226 Difference]: Without dead ends: 166 [2021-07-09 17:36:03,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 372.5ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:36:03,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-09 17:36:03,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 129. [2021-07-09 17:36:03,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 279 transitions. [2021-07-09 17:36:03,594 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 279 transitions. Word has length 19 [2021-07-09 17:36:03,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:03,595 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 279 transitions. [2021-07-09 17:36:03,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:03,595 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 279 transitions. [2021-07-09 17:36:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:03,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:03,595 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:03,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2811,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:03,795 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:03,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:03,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1695067920, now seen corresponding path program 525 times [2021-07-09 17:36:03,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:03,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464093322] [2021-07-09 17:36:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:03,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:03,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464093322] [2021-07-09 17:36:03,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464093322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:03,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420249249] [2021-07-09 17:36:03,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:03,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:36:03,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:03,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:03,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:04,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420249249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:04,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:04,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:04,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191358188] [2021-07-09 17:36:04,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:04,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:04,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:04,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:04,030 INFO L87 Difference]: Start difference. First operand 129 states and 279 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:04,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:04,260 INFO L93 Difference]: Finished difference Result 137 states and 289 transitions. [2021-07-09 17:36:04,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:04,260 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:04,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:04,260 INFO L225 Difference]: With dead ends: 137 [2021-07-09 17:36:04,260 INFO L226 Difference]: Without dead ends: 129 [2021-07-09 17:36:04,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 251.5ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:04,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-07-09 17:36:04,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-07-09 17:36:04,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.171875) internal successors, (278), 128 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:04,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 278 transitions. [2021-07-09 17:36:04,262 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 278 transitions. Word has length 19 [2021-07-09 17:36:04,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:04,262 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 278 transitions. [2021-07-09 17:36:04,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:04,262 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 278 transitions. [2021-07-09 17:36:04,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:04,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:04,262 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:04,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2813 [2021-07-09 17:36:04,463 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:04,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:04,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1282590462, now seen corresponding path program 526 times [2021-07-09 17:36:04,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:04,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581907880] [2021-07-09 17:36:04,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:04,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:04,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581907880] [2021-07-09 17:36:04,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581907880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:04,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825558857] [2021-07-09 17:36:04,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:04,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:04,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:04,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:04,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:04,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:04,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:04,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:04,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:04,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:04,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:04,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:04,694 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:36:04,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:04,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:36:04,697 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:04,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:04,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:04,703 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:36:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:04,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825558857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:04,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:04,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:04,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283452826] [2021-07-09 17:36:04,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:04,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:04,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:04,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:04,721 INFO L87 Difference]: Start difference. First operand 129 states and 278 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:04,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:04,827 INFO L93 Difference]: Finished difference Result 143 states and 302 transitions. [2021-07-09 17:36:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:04,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:04,828 INFO L225 Difference]: With dead ends: 143 [2021-07-09 17:36:04,828 INFO L226 Difference]: Without dead ends: 143 [2021-07-09 17:36:04,828 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:04,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-09 17:36:04,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 119. [2021-07-09 17:36:04,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.152542372881356) internal successors, (254), 118 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:04,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 254 transitions. [2021-07-09 17:36:04,829 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 254 transitions. Word has length 19 [2021-07-09 17:36:04,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:04,829 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 254 transitions. [2021-07-09 17:36:04,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:04,830 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 254 transitions. [2021-07-09 17:36:04,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:04,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:04,830 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:05,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2818,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:05,030 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:05,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:05,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1207617126, now seen corresponding path program 527 times [2021-07-09 17:36:05,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:05,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667783210] [2021-07-09 17:36:05,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:05,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:05,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667783210] [2021-07-09 17:36:05,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667783210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:05,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178887476] [2021-07-09 17:36:05,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:05,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:36:05,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:05,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:05,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:05,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:05,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:05,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,243 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:36:05,243 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:36:05,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,244 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:36:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:05,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178887476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:05,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:05,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:05,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835628503] [2021-07-09 17:36:05,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:05,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:05,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:05,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:05,258 INFO L87 Difference]: Start difference. First operand 119 states and 254 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:05,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:05,566 INFO L93 Difference]: Finished difference Result 160 states and 336 transitions. [2021-07-09 17:36:05,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:36:05,566 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:05,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:05,567 INFO L225 Difference]: With dead ends: 160 [2021-07-09 17:36:05,567 INFO L226 Difference]: Without dead ends: 160 [2021-07-09 17:36:05,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:36:05,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-07-09 17:36:05,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 119. [2021-07-09 17:36:05,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.152542372881356) internal successors, (254), 118 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:05,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 254 transitions. [2021-07-09 17:36:05,568 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 254 transitions. Word has length 19 [2021-07-09 17:36:05,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:05,568 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 254 transitions. [2021-07-09 17:36:05,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:05,568 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 254 transitions. [2021-07-09 17:36:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:05,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:05,569 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:05,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2820 [2021-07-09 17:36:05,769 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:05,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:05,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1567533644, now seen corresponding path program 528 times [2021-07-09 17:36:05,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:05,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928917327] [2021-07-09 17:36:05,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:05,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:05,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928917327] [2021-07-09 17:36:05,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928917327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:05,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955615897] [2021-07-09 17:36:05,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:05,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:36:05,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:05,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:05,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:05,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:05,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:05,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:05,967 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:05,970 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:06,000 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:36:06,000 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:36:06,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:06,001 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:36:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:06,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955615897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:06,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:06,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:06,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978082590] [2021-07-09 17:36:06,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:06,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:06,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:06,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:06,035 INFO L87 Difference]: Start difference. First operand 119 states and 254 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:06,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:06,415 INFO L93 Difference]: Finished difference Result 175 states and 367 transitions. [2021-07-09 17:36:06,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:36:06,415 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:06,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:06,415 INFO L225 Difference]: With dead ends: 175 [2021-07-09 17:36:06,415 INFO L226 Difference]: Without dead ends: 175 [2021-07-09 17:36:06,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:36:06,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-07-09 17:36:06,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 119. [2021-07-09 17:36:06,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.152542372881356) internal successors, (254), 118 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:06,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 254 transitions. [2021-07-09 17:36:06,417 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 254 transitions. Word has length 19 [2021-07-09 17:36:06,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:06,417 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 254 transitions. [2021-07-09 17:36:06,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:06,417 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 254 transitions. [2021-07-09 17:36:06,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:06,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:06,417 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:06,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2824,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:06,618 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:06,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:06,618 INFO L82 PathProgramCache]: Analyzing trace with hash -857485874, now seen corresponding path program 529 times [2021-07-09 17:36:06,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:06,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736106302] [2021-07-09 17:36:06,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:06,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:06,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736106302] [2021-07-09 17:36:06,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736106302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:06,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373834492] [2021-07-09 17:36:06,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:06,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:06,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:06,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373834492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:06,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:06,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:06,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598753417] [2021-07-09 17:36:06,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:06,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:06,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:06,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:06,825 INFO L87 Difference]: Start difference. First operand 119 states and 254 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:07,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:07,092 INFO L93 Difference]: Finished difference Result 142 states and 300 transitions. [2021-07-09 17:36:07,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:36:07,092 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:07,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:07,093 INFO L225 Difference]: With dead ends: 142 [2021-07-09 17:36:07,093 INFO L226 Difference]: Without dead ends: 142 [2021-07-09 17:36:07,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 270.0ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:07,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-07-09 17:36:07,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 117. [2021-07-09 17:36:07,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1551724137931036) internal successors, (250), 116 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:07,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 250 transitions. [2021-07-09 17:36:07,094 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 250 transitions. Word has length 19 [2021-07-09 17:36:07,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:07,094 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 250 transitions. [2021-07-09 17:36:07,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:07,094 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 250 transitions. [2021-07-09 17:36:07,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:07,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:07,094 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:07,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2834,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:07,295 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:07,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:07,295 INFO L82 PathProgramCache]: Analyzing trace with hash 620649532, now seen corresponding path program 530 times [2021-07-09 17:36:07,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:07,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613060566] [2021-07-09 17:36:07,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:07,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:07,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613060566] [2021-07-09 17:36:07,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613060566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:07,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412556704] [2021-07-09 17:36:07,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:07,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:07,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:07,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:07,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:07,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:07,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:07,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:07,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:07,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:07,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:07,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:07,543 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:36:07,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:36:07,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:07,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:07,557 INFO L518 ElimStorePlain]: Eliminatee v_prenex_427 vanished before elimination [2021-07-09 17:36:07,557 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:36:07,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:07,558 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:36:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:07,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412556704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:07,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:07,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:07,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419821272] [2021-07-09 17:36:07,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:07,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:07,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:07,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:07,583 INFO L87 Difference]: Start difference. First operand 117 states and 250 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:07,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:07,970 INFO L93 Difference]: Finished difference Result 161 states and 331 transitions. [2021-07-09 17:36:07,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:36:07,970 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:07,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:07,971 INFO L225 Difference]: With dead ends: 161 [2021-07-09 17:36:07,971 INFO L226 Difference]: Without dead ends: 161 [2021-07-09 17:36:07,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 350.4ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:36:07,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-09 17:36:07,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 117. [2021-07-09 17:36:07,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1551724137931036) internal successors, (250), 116 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:07,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 250 transitions. [2021-07-09 17:36:07,972 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 250 transitions. Word has length 19 [2021-07-09 17:36:07,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:07,972 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 250 transitions. [2021-07-09 17:36:07,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:07,972 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 250 transitions. [2021-07-09 17:36:07,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:07,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:07,972 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:08,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2844 [2021-07-09 17:36:08,173 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:08,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:08,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1330697302, now seen corresponding path program 531 times [2021-07-09 17:36:08,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:08,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243077390] [2021-07-09 17:36:08,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:08,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:08,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243077390] [2021-07-09 17:36:08,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243077390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:08,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975825807] [2021-07-09 17:36:08,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:08,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:36:08,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:08,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:08,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:08,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:08,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975825807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:08,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:08,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:08,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152992409] [2021-07-09 17:36:08,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:08,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:08,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:08,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:08,399 INFO L87 Difference]: Start difference. First operand 117 states and 250 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:08,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:08,770 INFO L93 Difference]: Finished difference Result 204 states and 413 transitions. [2021-07-09 17:36:08,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:36:08,770 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:08,770 INFO L225 Difference]: With dead ends: 204 [2021-07-09 17:36:08,770 INFO L226 Difference]: Without dead ends: 204 [2021-07-09 17:36:08,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 366.3ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:36:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-07-09 17:36:08,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 118. [2021-07-09 17:36:08,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1794871794871793) internal successors, (255), 117 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:08,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 255 transitions. [2021-07-09 17:36:08,772 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 255 transitions. Word has length 19 [2021-07-09 17:36:08,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:08,772 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 255 transitions. [2021-07-09 17:36:08,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:08,772 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 255 transitions. [2021-07-09 17:36:08,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:08,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:08,772 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:08,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2851 [2021-07-09 17:36:08,973 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:08,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:08,973 INFO L82 PathProgramCache]: Analyzing trace with hash -902354692, now seen corresponding path program 532 times [2021-07-09 17:36:08,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:08,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419036717] [2021-07-09 17:36:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:09,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:09,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419036717] [2021-07-09 17:36:09,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419036717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:09,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664237206] [2021-07-09 17:36:09,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:09,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:09,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:09,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:09,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:09,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664237206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:09,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:09,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:09,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341367840] [2021-07-09 17:36:09,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:09,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:09,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:09,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:09,195 INFO L87 Difference]: Start difference. First operand 118 states and 255 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:09,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:09,529 INFO L93 Difference]: Finished difference Result 127 states and 269 transitions. [2021-07-09 17:36:09,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:36:09,529 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:09,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:09,530 INFO L225 Difference]: With dead ends: 127 [2021-07-09 17:36:09,530 INFO L226 Difference]: Without dead ends: 123 [2021-07-09 17:36:09,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 333.7ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:36:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-09 17:36:09,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2021-07-09 17:36:09,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1709401709401708) internal successors, (254), 117 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:09,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 254 transitions. [2021-07-09 17:36:09,531 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 254 transitions. Word has length 19 [2021-07-09 17:36:09,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:09,531 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 254 transitions. [2021-07-09 17:36:09,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:09,531 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 254 transitions. [2021-07-09 17:36:09,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:09,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:09,531 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:09,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2861 [2021-07-09 17:36:09,732 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:09,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:09,732 INFO L82 PathProgramCache]: Analyzing trace with hash -815473458, now seen corresponding path program 533 times [2021-07-09 17:36:09,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:09,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361581264] [2021-07-09 17:36:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:09,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:09,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361581264] [2021-07-09 17:36:09,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361581264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:09,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520373742] [2021-07-09 17:36:09,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:09,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:36:09,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:09,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:09,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:09,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520373742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:09,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:09,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:09,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087939650] [2021-07-09 17:36:09,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:09,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:09,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:09,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:09,938 INFO L87 Difference]: Start difference. First operand 118 states and 254 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:10,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:10,190 INFO L93 Difference]: Finished difference Result 150 states and 315 transitions. [2021-07-09 17:36:10,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:36:10,190 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:10,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:10,190 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:36:10,190 INFO L226 Difference]: Without dead ends: 150 [2021-07-09 17:36:10,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 236.2ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:36:10,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-07-09 17:36:10,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 114. [2021-07-09 17:36:10,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.150442477876106) internal successors, (243), 113 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:10,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 243 transitions. [2021-07-09 17:36:10,192 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 243 transitions. Word has length 19 [2021-07-09 17:36:10,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:10,192 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 243 transitions. [2021-07-09 17:36:10,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:10,192 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 243 transitions. [2021-07-09 17:36:10,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:10,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:10,192 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:10,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2866,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:10,392 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:10,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:10,393 INFO L82 PathProgramCache]: Analyzing trace with hash -915217718, now seen corresponding path program 534 times [2021-07-09 17:36:10,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:10,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752798093] [2021-07-09 17:36:10,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:10,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:10,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752798093] [2021-07-09 17:36:10,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752798093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:10,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450176319] [2021-07-09 17:36:10,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:10,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:36:10,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:10,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:10,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:10,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:10,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:10,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:10,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:10,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:10,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:10,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:10,668 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:36:10,668 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:36:10,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:36:10,671 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:10,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:10,682 INFO L518 ElimStorePlain]: Eliminatee v_prenex_431 vanished before elimination [2021-07-09 17:36:10,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:10,683 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:36:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:10,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450176319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:10,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:10,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:10,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844413683] [2021-07-09 17:36:10,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:10,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:10,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:10,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:10,721 INFO L87 Difference]: Start difference. First operand 114 states and 243 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:11,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:11,141 INFO L93 Difference]: Finished difference Result 151 states and 307 transitions. [2021-07-09 17:36:11,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:36:11,142 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:11,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:11,142 INFO L225 Difference]: With dead ends: 151 [2021-07-09 17:36:11,142 INFO L226 Difference]: Without dead ends: 151 [2021-07-09 17:36:11,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 411.4ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:11,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-09 17:36:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2021-07-09 17:36:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.150442477876106) internal successors, (243), 113 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 243 transitions. [2021-07-09 17:36:11,143 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 243 transitions. Word has length 19 [2021-07-09 17:36:11,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:11,143 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 243 transitions. [2021-07-09 17:36:11,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:11,143 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 243 transitions. [2021-07-09 17:36:11,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:11,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:11,144 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:11,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2870 [2021-07-09 17:36:11,344 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:11,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:11,344 INFO L82 PathProgramCache]: Analyzing trace with hash 444899022, now seen corresponding path program 535 times [2021-07-09 17:36:11,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:11,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221182689] [2021-07-09 17:36:11,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:11,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:11,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221182689] [2021-07-09 17:36:11,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221182689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:11,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042333863] [2021-07-09 17:36:11,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:11,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:11,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:11,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042333863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:11,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:11,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:11,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609771748] [2021-07-09 17:36:11,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:11,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:11,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:11,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:11,587 INFO L87 Difference]: Start difference. First operand 114 states and 243 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:11,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:11,968 INFO L93 Difference]: Finished difference Result 194 states and 391 transitions. [2021-07-09 17:36:11,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:36:11,969 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:11,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:11,969 INFO L225 Difference]: With dead ends: 194 [2021-07-09 17:36:11,969 INFO L226 Difference]: Without dead ends: 194 [2021-07-09 17:36:11,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 339.5ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:11,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-07-09 17:36:11,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 116. [2021-07-09 17:36:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1826086956521737) internal successors, (251), 115 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:11,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 251 transitions. [2021-07-09 17:36:11,970 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 251 transitions. Word has length 19 [2021-07-09 17:36:11,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:11,971 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 251 transitions. [2021-07-09 17:36:11,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:11,971 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 251 transitions. [2021-07-09 17:36:11,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:11,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:11,971 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:12,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2877 [2021-07-09 17:36:12,171 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:12,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:12,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1788152972, now seen corresponding path program 536 times [2021-07-09 17:36:12,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:12,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214385844] [2021-07-09 17:36:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:12,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:12,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214385844] [2021-07-09 17:36:12,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214385844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:12,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989422866] [2021-07-09 17:36:12,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:12,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:12,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:12,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:12,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:12,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989422866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:12,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:12,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:12,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829257720] [2021-07-09 17:36:12,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:12,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:12,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:12,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:12,413 INFO L87 Difference]: Start difference. First operand 116 states and 251 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:12,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:12,789 INFO L93 Difference]: Finished difference Result 129 states and 271 transitions. [2021-07-09 17:36:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:36:12,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:12,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:12,789 INFO L225 Difference]: With dead ends: 129 [2021-07-09 17:36:12,789 INFO L226 Difference]: Without dead ends: 125 [2021-07-09 17:36:12,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 375.4ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:12,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-07-09 17:36:12,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 116. [2021-07-09 17:36:12,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1739130434782608) internal successors, (250), 115 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:12,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 250 transitions. [2021-07-09 17:36:12,790 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 250 transitions. Word has length 19 [2021-07-09 17:36:12,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:12,791 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 250 transitions. [2021-07-09 17:36:12,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:12,791 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 250 transitions. [2021-07-09 17:36:12,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:12,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:12,791 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:12,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2889,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:12,991 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:12,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:12,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1701271738, now seen corresponding path program 537 times [2021-07-09 17:36:12,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:12,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026603742] [2021-07-09 17:36:12,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:12,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:13,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:13,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026603742] [2021-07-09 17:36:13,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026603742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:13,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014986794] [2021-07-09 17:36:13,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:13,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:36:13,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:13,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:13,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:13,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:13,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014986794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:13,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:13,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:13,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995742054] [2021-07-09 17:36:13,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:13,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:13,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:13,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:13,205 INFO L87 Difference]: Start difference. First operand 116 states and 250 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:13,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:13,562 INFO L93 Difference]: Finished difference Result 167 states and 348 transitions. [2021-07-09 17:36:13,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:36:13,563 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:13,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:13,563 INFO L225 Difference]: With dead ends: 167 [2021-07-09 17:36:13,563 INFO L226 Difference]: Without dead ends: 167 [2021-07-09 17:36:13,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:13,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-09 17:36:13,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 115. [2021-07-09 17:36:13,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.175438596491228) internal successors, (248), 114 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:13,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 248 transitions. [2021-07-09 17:36:13,564 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 248 transitions. Word has length 19 [2021-07-09 17:36:13,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:13,565 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 248 transitions. [2021-07-09 17:36:13,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:13,565 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 248 transitions. [2021-07-09 17:36:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:13,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:13,565 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:13,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2894 [2021-07-09 17:36:13,765 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:13,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:13,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2000468058, now seen corresponding path program 538 times [2021-07-09 17:36:13,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:13,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680083956] [2021-07-09 17:36:13,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:13,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:13,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680083956] [2021-07-09 17:36:13,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680083956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:13,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210734481] [2021-07-09 17:36:13,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:13,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:13,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:13,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:13,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:13,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210734481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:13,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:13,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:13,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71943684] [2021-07-09 17:36:13,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:13,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:13,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:13,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:13,980 INFO L87 Difference]: Start difference. First operand 115 states and 248 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:14,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:14,280 INFO L93 Difference]: Finished difference Result 125 states and 263 transitions. [2021-07-09 17:36:14,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:36:14,281 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:14,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:14,281 INFO L225 Difference]: With dead ends: 125 [2021-07-09 17:36:14,281 INFO L226 Difference]: Without dead ends: 119 [2021-07-09 17:36:14,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 296.5ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-09 17:36:14,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2021-07-09 17:36:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1666666666666665) internal successors, (247), 114 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:14,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 247 transitions. [2021-07-09 17:36:14,282 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 247 transitions. Word has length 19 [2021-07-09 17:36:14,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:14,282 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 247 transitions. [2021-07-09 17:36:14,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:14,282 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 247 transitions. [2021-07-09 17:36:14,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:14,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:14,283 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:14,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2898,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:14,483 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:14,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:14,483 INFO L82 PathProgramCache]: Analyzing trace with hash 486911438, now seen corresponding path program 539 times [2021-07-09 17:36:14,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:14,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963287660] [2021-07-09 17:36:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:14,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:14,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963287660] [2021-07-09 17:36:14,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963287660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:14,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694176359] [2021-07-09 17:36:14,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:14,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:36:14,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:14,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:14,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:14,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694176359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:14,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:14,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:14,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715704694] [2021-07-09 17:36:14,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:14,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:14,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:14,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:14,681 INFO L87 Difference]: Start difference. First operand 115 states and 247 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:14,828 INFO L93 Difference]: Finished difference Result 146 states and 305 transitions. [2021-07-09 17:36:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:36:14,828 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:14,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:14,828 INFO L225 Difference]: With dead ends: 146 [2021-07-09 17:36:14,828 INFO L226 Difference]: Without dead ends: 146 [2021-07-09 17:36:14,828 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:14,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-09 17:36:14,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 110. [2021-07-09 17:36:14,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:14,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-07-09 17:36:14,830 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 19 [2021-07-09 17:36:14,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:14,830 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-07-09 17:36:14,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:14,830 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-07-09 17:36:14,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:14,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:14,830 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:15,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2903,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:15,031 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:15,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:15,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1913738142, now seen corresponding path program 540 times [2021-07-09 17:36:15,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:15,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673301501] [2021-07-09 17:36:15,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:15,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:15,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673301501] [2021-07-09 17:36:15,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673301501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:15,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776870526] [2021-07-09 17:36:15,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:15,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:36:15,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:15,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:15,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:15,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776870526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:15,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:15,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:15,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966500744] [2021-07-09 17:36:15,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:15,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:15,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:15,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:15,290 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:15,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:15,486 INFO L93 Difference]: Finished difference Result 145 states and 289 transitions. [2021-07-09 17:36:15,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:36:15,487 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:15,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:15,487 INFO L225 Difference]: With dead ends: 145 [2021-07-09 17:36:15,487 INFO L226 Difference]: Without dead ends: 142 [2021-07-09 17:36:15,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:15,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-07-09 17:36:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 117. [2021-07-09 17:36:15,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1551724137931036) internal successors, (250), 116 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:15,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 250 transitions. [2021-07-09 17:36:15,488 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 250 transitions. Word has length 19 [2021-07-09 17:36:15,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:15,489 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 250 transitions. [2021-07-09 17:36:15,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:15,489 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 250 transitions. [2021-07-09 17:36:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:15,489 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:15,489 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:15,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2907,541 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:15,689 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:15,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:15,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1955091652, now seen corresponding path program 541 times [2021-07-09 17:36:15,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:15,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903574569] [2021-07-09 17:36:15,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:15,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:15,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903574569] [2021-07-09 17:36:15,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903574569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:15,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179825628] [2021-07-09 17:36:15,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:15,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:15,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:15,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:15,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:15,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:15,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:15,979 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:36:15,979 INFO L518 ElimStorePlain]: Eliminatee v_prenex_438 vanished before elimination [2021-07-09 17:36:15,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:36:15,981 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:15,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:15,996 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:36:15,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:15,997 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:36:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:16,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179825628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:16,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:16,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:16,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366643163] [2021-07-09 17:36:16,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:16,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:16,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:16,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:16,041 INFO L87 Difference]: Start difference. First operand 117 states and 250 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:16,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:16,431 INFO L93 Difference]: Finished difference Result 143 states and 286 transitions. [2021-07-09 17:36:16,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:16,432 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:16,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:16,432 INFO L225 Difference]: With dead ends: 143 [2021-07-09 17:36:16,432 INFO L226 Difference]: Without dead ends: 143 [2021-07-09 17:36:16,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 391.2ms TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:16,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-09 17:36:16,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 113. [2021-07-09 17:36:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-07-09 17:36:16,433 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-07-09 17:36:16,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:16,433 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-07-09 17:36:16,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:16,433 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-07-09 17:36:16,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:16,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:16,434 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:16,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2920,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:16,634 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:16,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:16,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1245043882, now seen corresponding path program 542 times [2021-07-09 17:36:16,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:16,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112891242] [2021-07-09 17:36:16,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:16,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:16,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112891242] [2021-07-09 17:36:16,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112891242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:16,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020557494] [2021-07-09 17:36:16,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:16,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:16,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:16,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:16,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:16,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:16,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:16,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:16,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:16,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:16,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:16,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:16,896 INFO L628 ElimStorePlain]: treesize reduction 70, result has 41.2 percent of original size [2021-07-09 17:36:16,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:16,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:36:16,902 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:16,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:16,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:36:16,920 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:16,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:16,934 INFO L518 ElimStorePlain]: Eliminatee v_prenex_441 vanished before elimination [2021-07-09 17:36:16,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:16,935 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:36:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:16,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020557494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:16,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:16,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:16,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734354938] [2021-07-09 17:36:16,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:16,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:16,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:16,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:16,974 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:17,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:17,186 INFO L93 Difference]: Finished difference Result 144 states and 282 transitions. [2021-07-09 17:36:17,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:36:17,186 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:17,186 INFO L225 Difference]: With dead ends: 144 [2021-07-09 17:36:17,186 INFO L226 Difference]: Without dead ends: 144 [2021-07-09 17:36:17,186 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 213.9ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:17,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-09 17:36:17,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2021-07-09 17:36:17,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:17,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-07-09 17:36:17,188 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-07-09 17:36:17,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:17,188 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-07-09 17:36:17,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:17,188 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-07-09 17:36:17,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:17,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:17,188 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:17,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2927,543 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:17,388 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:17,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:17,389 INFO L82 PathProgramCache]: Analyzing trace with hash 816871420, now seen corresponding path program 543 times [2021-07-09 17:36:17,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:17,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361918574] [2021-07-09 17:36:17,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:17,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:17,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361918574] [2021-07-09 17:36:17,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361918574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:17,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843429563] [2021-07-09 17:36:17,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:17,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:36:17,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:17,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:17,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:17,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843429563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:17,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:17,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:17,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470333235] [2021-07-09 17:36:17,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:17,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:17,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:17,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:17,671 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:18,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:18,077 INFO L93 Difference]: Finished difference Result 122 states and 245 transitions. [2021-07-09 17:36:18,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:18,078 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:18,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:18,078 INFO L225 Difference]: With dead ends: 122 [2021-07-09 17:36:18,078 INFO L226 Difference]: Without dead ends: 118 [2021-07-09 17:36:18,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 420.5ms TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:36:18,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-07-09 17:36:18,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2021-07-09 17:36:18,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.081081081081081) internal successors, (231), 111 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:18,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 231 transitions. [2021-07-09 17:36:18,079 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 231 transitions. Word has length 19 [2021-07-09 17:36:18,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:18,079 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 231 transitions. [2021-07-09 17:36:18,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:18,079 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 231 transitions. [2021-07-09 17:36:18,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:18,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:18,079 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:18,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2931,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:18,280 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:18,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:18,280 INFO L82 PathProgramCache]: Analyzing trace with hash 903752654, now seen corresponding path program 544 times [2021-07-09 17:36:18,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:18,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938199381] [2021-07-09 17:36:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:18,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:18,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938199381] [2021-07-09 17:36:18,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938199381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:18,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476593294] [2021-07-09 17:36:18,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:18,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:18,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:18,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:18,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:18,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:18,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:18,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:18,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:18,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:18,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:18,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:18,573 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:36:18,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:18,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:36:18,575 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:18,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:18,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:18,581 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:36:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:18,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476593294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:18,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:18,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:18,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028919940] [2021-07-09 17:36:18,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:18,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:18,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:18,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:18,599 INFO L87 Difference]: Start difference. First operand 112 states and 231 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:18,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:18,786 INFO L93 Difference]: Finished difference Result 136 states and 273 transitions. [2021-07-09 17:36:18,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:36:18,786 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:18,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:18,786 INFO L225 Difference]: With dead ends: 136 [2021-07-09 17:36:18,786 INFO L226 Difference]: Without dead ends: 136 [2021-07-09 17:36:18,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:18,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-09 17:36:18,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 111. [2021-07-09 17:36:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:18,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-07-09 17:36:18,787 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 19 [2021-07-09 17:36:18,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:18,787 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-07-09 17:36:18,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:18,788 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-07-09 17:36:18,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:18,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:18,788 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:18,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2937 [2021-07-09 17:36:18,988 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:18,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:18,988 INFO L82 PathProgramCache]: Analyzing trace with hash 310525154, now seen corresponding path program 545 times [2021-07-09 17:36:18,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:18,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325151791] [2021-07-09 17:36:18,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:19,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:19,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325151791] [2021-07-09 17:36:19,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325151791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:19,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110555581] [2021-07-09 17:36:19,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:19,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:36:19,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:19,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:19,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:19,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110555581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:19,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:19,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:19,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715157026] [2021-07-09 17:36:19,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:19,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:19,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:19,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:19,254 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:19,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:19,595 INFO L93 Difference]: Finished difference Result 121 states and 242 transitions. [2021-07-09 17:36:19,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:19,595 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:19,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:19,596 INFO L225 Difference]: With dead ends: 121 [2021-07-09 17:36:19,596 INFO L226 Difference]: Without dead ends: 115 [2021-07-09 17:36:19,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 357.1ms TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:36:19,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-07-09 17:36:19,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2021-07-09 17:36:19,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0727272727272728) internal successors, (228), 110 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:19,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 228 transitions. [2021-07-09 17:36:19,597 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 228 transitions. Word has length 19 [2021-07-09 17:36:19,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:19,597 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 228 transitions. [2021-07-09 17:36:19,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:19,597 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 228 transitions. [2021-07-09 17:36:19,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:19,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:19,597 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:19,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2939,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:19,798 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:19,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:19,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1203031466, now seen corresponding path program 546 times [2021-07-09 17:36:19,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:19,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509323627] [2021-07-09 17:36:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:19,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:19,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509323627] [2021-07-09 17:36:19,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509323627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:19,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575049464] [2021-07-09 17:36:19,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:19,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:36:19,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:19,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:19,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:20,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:20,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:20,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:20,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:20,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:20,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:20,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:20,039 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-07-09 17:36:20,039 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:36:20,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:20,040 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:36:20,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:20,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575049464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:20,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:20,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:20,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798596133] [2021-07-09 17:36:20,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:20,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:20,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:20,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:20,058 INFO L87 Difference]: Start difference. First operand 111 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:20,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:20,171 INFO L93 Difference]: Finished difference Result 143 states and 288 transitions. [2021-07-09 17:36:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:36:20,171 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:20,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:20,171 INFO L225 Difference]: With dead ends: 143 [2021-07-09 17:36:20,171 INFO L226 Difference]: Without dead ends: 143 [2021-07-09 17:36:20,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:20,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-09 17:36:20,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 110. [2021-07-09 17:36:20,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.073394495412844) internal successors, (226), 109 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 226 transitions. [2021-07-09 17:36:20,173 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 226 transitions. Word has length 19 [2021-07-09 17:36:20,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:20,173 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 226 transitions. [2021-07-09 17:36:20,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:20,173 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 226 transitions. [2021-07-09 17:36:20,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:20,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:20,173 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:20,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2944,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:20,373 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:20,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:20,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1793660092, now seen corresponding path program 547 times [2021-07-09 17:36:20,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:20,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064221941] [2021-07-09 17:36:20,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:20,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:20,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064221941] [2021-07-09 17:36:20,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064221941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:20,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308683925] [2021-07-09 17:36:20,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:20,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:20,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:20,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308683925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:20,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:20,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:20,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76609513] [2021-07-09 17:36:20,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:20,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:20,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:20,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:20,590 INFO L87 Difference]: Start difference. First operand 110 states and 226 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:20,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:20,806 INFO L93 Difference]: Finished difference Result 118 states and 236 transitions. [2021-07-09 17:36:20,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:20,806 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:20,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:20,807 INFO L225 Difference]: With dead ends: 118 [2021-07-09 17:36:20,807 INFO L226 Difference]: Without dead ends: 110 [2021-07-09 17:36:20,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 236.7ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:20,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-07-09 17:36:20,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-07-09 17:36:20,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 109 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:20,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 225 transitions. [2021-07-09 17:36:20,808 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 225 transitions. Word has length 19 [2021-07-09 17:36:20,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:20,808 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 225 transitions. [2021-07-09 17:36:20,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:20,808 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 225 transitions. [2021-07-09 17:36:20,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:20,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:20,808 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:21,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2946 [2021-07-09 17:36:21,009 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:21,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:21,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2088829746, now seen corresponding path program 548 times [2021-07-09 17:36:21,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:21,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956880171] [2021-07-09 17:36:21,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:21,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:21,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956880171] [2021-07-09 17:36:21,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956880171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:21,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513972592] [2021-07-09 17:36:21,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:21,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:21,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:21,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:21,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:21,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:21,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:21,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:21,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:21,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:21,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:21,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:21,226 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:36:21,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:21,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:36:21,229 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:21,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:21,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:21,235 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:36:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:21,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513972592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:21,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:21,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:21,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655012084] [2021-07-09 17:36:21,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:21,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:21,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:21,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:21,259 INFO L87 Difference]: Start difference. First operand 110 states and 225 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:21,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:21,367 INFO L93 Difference]: Finished difference Result 124 states and 249 transitions. [2021-07-09 17:36:21,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:21,368 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:21,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:21,368 INFO L225 Difference]: With dead ends: 124 [2021-07-09 17:36:21,368 INFO L226 Difference]: Without dead ends: 124 [2021-07-09 17:36:21,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:21,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-07-09 17:36:21,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 101. [2021-07-09 17:36:21,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.03) internal successors, (203), 100 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:21,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 203 transitions. [2021-07-09 17:36:21,369 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 203 transitions. Word has length 19 [2021-07-09 17:36:21,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:21,369 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 203 transitions. [2021-07-09 17:36:21,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:21,369 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 203 transitions. [2021-07-09 17:36:21,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:21,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:21,369 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:21,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2951,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:21,570 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:21,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:21,570 INFO L82 PathProgramCache]: Analyzing trace with hash 640804434, now seen corresponding path program 549 times [2021-07-09 17:36:21,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:21,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886337446] [2021-07-09 17:36:21,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:21,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:21,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886337446] [2021-07-09 17:36:21,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886337446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:21,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987977693] [2021-07-09 17:36:21,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:21,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:36:21,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:21,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:21,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:21,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:21,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987977693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:21,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:21,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:21,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200621218] [2021-07-09 17:36:21,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:21,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:21,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:21,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:21,854 INFO L87 Difference]: Start difference. First operand 101 states and 203 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:22,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:22,144 INFO L93 Difference]: Finished difference Result 155 states and 295 transitions. [2021-07-09 17:36:22,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:36:22,144 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:22,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:22,144 INFO L225 Difference]: With dead ends: 155 [2021-07-09 17:36:22,144 INFO L226 Difference]: Without dead ends: 152 [2021-07-09 17:36:22,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 300.2ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:36:22,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-07-09 17:36:22,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 109. [2021-07-09 17:36:22,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-07-09 17:36:22,146 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-07-09 17:36:22,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:22,146 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-07-09 17:36:22,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:22,146 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-07-09 17:36:22,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:22,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:22,146 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:22,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2953 [2021-07-09 17:36:22,347 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:22,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:22,347 INFO L82 PathProgramCache]: Analyzing trace with hash 416872966, now seen corresponding path program 550 times [2021-07-09 17:36:22,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:22,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844386663] [2021-07-09 17:36:22,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:22,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:22,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844386663] [2021-07-09 17:36:22,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844386663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:22,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23771679] [2021-07-09 17:36:22,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:22,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:22,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:22,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:22,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:22,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:22,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:22,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:22,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:22,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:22,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:22,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:22,684 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:36:22,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:36:22,687 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:22,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:22,698 INFO L518 ElimStorePlain]: Eliminatee v_prenex_449 vanished before elimination [2021-07-09 17:36:22,699 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:36:22,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:22,699 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:36:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:22,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23771679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:22,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:22,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:22,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752773568] [2021-07-09 17:36:22,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:22,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:22,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:22,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:22,739 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:23,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:23,321 INFO L93 Difference]: Finished difference Result 135 states and 264 transitions. [2021-07-09 17:36:23,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:23,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:23,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:23,322 INFO L225 Difference]: With dead ends: 135 [2021-07-09 17:36:23,322 INFO L226 Difference]: Without dead ends: 135 [2021-07-09 17:36:23,322 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 591.6ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:36:23,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-09 17:36:23,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2021-07-09 17:36:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:23,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-07-09 17:36:23,323 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-07-09 17:36:23,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:23,323 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-07-09 17:36:23,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:23,323 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-07-09 17:36:23,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:23,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:23,324 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:23,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2966,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:23,524 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:23,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:23,524 INFO L82 PathProgramCache]: Analyzing trace with hash -993917866, now seen corresponding path program 551 times [2021-07-09 17:36:23,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:23,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816254216] [2021-07-09 17:36:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:23,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:23,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816254216] [2021-07-09 17:36:23,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816254216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:23,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416666698] [2021-07-09 17:36:23,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:23,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:36:23,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:23,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:23,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:23,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:23,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:23,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:23,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:23,844 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:36:23,844 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:36:23,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:36:23,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:23,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:23,858 INFO L518 ElimStorePlain]: Eliminatee v_prenex_452 vanished before elimination [2021-07-09 17:36:23,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:23,859 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:36:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:23,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416666698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:23,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:23,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:23,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217690138] [2021-07-09 17:36:23,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:23,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:23,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:23,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:23,886 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:24,502 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-07-09 17:36:24,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:24,585 INFO L93 Difference]: Finished difference Result 137 states and 265 transitions. [2021-07-09 17:36:24,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:36:24,586 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:24,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:24,586 INFO L225 Difference]: With dead ends: 137 [2021-07-09 17:36:24,586 INFO L226 Difference]: Without dead ends: 135 [2021-07-09 17:36:24,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 683.0ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:36:24,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-09 17:36:24,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2021-07-09 17:36:24,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.064814814814815) internal successors, (223), 108 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:24,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 223 transitions. [2021-07-09 17:36:24,587 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 223 transitions. Word has length 19 [2021-07-09 17:36:24,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:24,587 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 223 transitions. [2021-07-09 17:36:24,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:24,587 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 223 transitions. [2021-07-09 17:36:24,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:24,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:24,588 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:24,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2973 [2021-07-09 17:36:24,788 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:24,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:24,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1776989706, now seen corresponding path program 552 times [2021-07-09 17:36:24,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:24,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612731755] [2021-07-09 17:36:24,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:24,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:24,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612731755] [2021-07-09 17:36:24,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612731755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:24,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038421294] [2021-07-09 17:36:24,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:24,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:36:24,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:24,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:24,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:25,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:25,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:25,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:25,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:25,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:25,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:25,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:25,078 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-07-09 17:36:25,078 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:36:25,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:25,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:25,081 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:25,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:25,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:25,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:36:25,099 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:25,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:25,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:25,117 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:36:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:25,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038421294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:25,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:25,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:25,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162183661] [2021-07-09 17:36:25,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:25,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:25,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:25,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:25,159 INFO L87 Difference]: Start difference. First operand 109 states and 223 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:25,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:25,465 INFO L93 Difference]: Finished difference Result 154 states and 291 transitions. [2021-07-09 17:36:25,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:36:25,466 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:25,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:25,466 INFO L225 Difference]: With dead ends: 154 [2021-07-09 17:36:25,466 INFO L226 Difference]: Without dead ends: 154 [2021-07-09 17:36:25,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 303.0ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:36:25,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-09 17:36:25,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 108. [2021-07-09 17:36:25,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:25,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-07-09 17:36:25,467 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-07-09 17:36:25,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:25,467 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-07-09 17:36:25,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:25,467 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-07-09 17:36:25,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:25,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:25,468 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:25,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 553 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2981 [2021-07-09 17:36:25,668 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:25,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:25,668 INFO L82 PathProgramCache]: Analyzing trace with hash -456062288, now seen corresponding path program 553 times [2021-07-09 17:36:25,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:25,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761126182] [2021-07-09 17:36:25,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:25,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:25,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761126182] [2021-07-09 17:36:25,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761126182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:25,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822991000] [2021-07-09 17:36:25,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:25,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:25,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:25,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822991000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:25,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:25,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:25,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481490867] [2021-07-09 17:36:25,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:25,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:25,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:25,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:25,972 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:26,570 INFO L93 Difference]: Finished difference Result 134 states and 257 transitions. [2021-07-09 17:36:26,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:26,570 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:26,570 INFO L225 Difference]: With dead ends: 134 [2021-07-09 17:36:26,571 INFO L226 Difference]: Without dead ends: 130 [2021-07-09 17:36:26,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 641.1ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:26,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-07-09 17:36:26,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 108. [2021-07-09 17:36:26,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.05607476635514) internal successors, (220), 107 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:26,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 220 transitions. [2021-07-09 17:36:26,572 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 220 transitions. Word has length 19 [2021-07-09 17:36:26,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:26,572 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 220 transitions. [2021-07-09 17:36:26,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:26,572 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 220 transitions. [2021-07-09 17:36:26,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:26,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:26,572 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:26,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2985 [2021-07-09 17:36:26,773 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:26,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:26,773 INFO L82 PathProgramCache]: Analyzing trace with hash -369181054, now seen corresponding path program 554 times [2021-07-09 17:36:26,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:26,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196838504] [2021-07-09 17:36:26,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:26,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:26,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196838504] [2021-07-09 17:36:26,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196838504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:26,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487848152] [2021-07-09 17:36:26,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:26,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:26,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:26,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:26,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:27,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:27,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:27,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:27,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:27,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:27,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:27,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:27,041 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:36:27,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:27,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:36:27,043 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:27,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:27,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:27,049 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:36:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:27,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487848152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:27,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:27,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:27,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937647485] [2021-07-09 17:36:27,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:27,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:27,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:27,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:27,068 INFO L87 Difference]: Start difference. First operand 108 states and 220 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:27,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:27,321 INFO L93 Difference]: Finished difference Result 148 states and 285 transitions. [2021-07-09 17:36:27,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:36:27,321 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:27,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:27,321 INFO L225 Difference]: With dead ends: 148 [2021-07-09 17:36:27,321 INFO L226 Difference]: Without dead ends: 148 [2021-07-09 17:36:27,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 264.0ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:27,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-07-09 17:36:27,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 107. [2021-07-09 17:36:27,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.056603773584906) internal successors, (218), 106 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:27,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 218 transitions. [2021-07-09 17:36:27,323 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 218 transitions. Word has length 19 [2021-07-09 17:36:27,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:27,323 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 218 transitions. [2021-07-09 17:36:27,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:27,323 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 218 transitions. [2021-07-09 17:36:27,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:27,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:27,323 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:27,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2990,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:27,523 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:27,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:27,524 INFO L82 PathProgramCache]: Analyzing trace with hash -962408554, now seen corresponding path program 555 times [2021-07-09 17:36:27,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:27,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059874664] [2021-07-09 17:36:27,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:27,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:27,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059874664] [2021-07-09 17:36:27,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059874664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:27,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37643169] [2021-07-09 17:36:27,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:27,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:36:27,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:27,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:27,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:27,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37643169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:27,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:27,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:27,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365087652] [2021-07-09 17:36:27,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:27,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:27,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:27,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:27,795 INFO L87 Difference]: Start difference. First operand 107 states and 218 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:28,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:28,278 INFO L93 Difference]: Finished difference Result 135 states and 257 transitions. [2021-07-09 17:36:28,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:28,278 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:28,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:28,278 INFO L225 Difference]: With dead ends: 135 [2021-07-09 17:36:28,278 INFO L226 Difference]: Without dead ends: 129 [2021-07-09 17:36:28,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 519.8ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:28,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-07-09 17:36:28,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 107. [2021-07-09 17:36:28,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.047169811320755) internal successors, (217), 106 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:28,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 217 transitions. [2021-07-09 17:36:28,280 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 217 transitions. Word has length 19 [2021-07-09 17:36:28,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:28,280 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 217 transitions. [2021-07-09 17:36:28,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:28,280 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 217 transitions. [2021-07-09 17:36:28,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:28,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:28,280 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:28,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2992 [2021-07-09 17:36:28,480 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:28,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:28,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1819002122, now seen corresponding path program 556 times [2021-07-09 17:36:28,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:28,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061593990] [2021-07-09 17:36:28,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:28,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:28,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061593990] [2021-07-09 17:36:28,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061593990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:28,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501280051] [2021-07-09 17:36:28,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:28,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:28,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:28,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:28,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:28,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:28,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:28,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:28,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:28,739 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:36:28,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:28,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:36:28,742 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:28,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:28,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:28,748 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:36:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:28,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501280051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:28,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:28,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:28,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248094140] [2021-07-09 17:36:28,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:28,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:28,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:28,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:28,767 INFO L87 Difference]: Start difference. First operand 107 states and 217 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:28,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:28,989 INFO L93 Difference]: Finished difference Result 157 states and 303 transitions. [2021-07-09 17:36:28,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:36:28,990 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:28,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:28,990 INFO L225 Difference]: With dead ends: 157 [2021-07-09 17:36:28,990 INFO L226 Difference]: Without dead ends: 157 [2021-07-09 17:36:28,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 248.8ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:28,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-09 17:36:28,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 106. [2021-07-09 17:36:28,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:28,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-07-09 17:36:28,991 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-07-09 17:36:28,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:28,991 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-07-09 17:36:28,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:28,992 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-07-09 17:36:28,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:28,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:28,992 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:29,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2997,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:29,192 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:29,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:29,192 INFO L82 PathProgramCache]: Analyzing trace with hash 520726384, now seen corresponding path program 557 times [2021-07-09 17:36:29,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:29,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469376199] [2021-07-09 17:36:29,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:29,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:29,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469376199] [2021-07-09 17:36:29,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469376199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:29,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90089520] [2021-07-09 17:36:29,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:29,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:36:29,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:29,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:29,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:29,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90089520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:29,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:29,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:29,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123928554] [2021-07-09 17:36:29,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:29,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:29,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:29,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:29,440 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:29,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:29,889 INFO L93 Difference]: Finished difference Result 136 states and 257 transitions. [2021-07-09 17:36:29,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:29,889 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:29,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:29,889 INFO L225 Difference]: With dead ends: 136 [2021-07-09 17:36:29,889 INFO L226 Difference]: Without dead ends: 128 [2021-07-09 17:36:29,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 490.4ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:29,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-07-09 17:36:29,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2021-07-09 17:36:29,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:29,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-07-09 17:36:29,891 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-07-09 17:36:29,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:29,891 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-07-09 17:36:29,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:29,891 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-07-09 17:36:29,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:29,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:29,891 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:30,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2999,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:30,091 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:30,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:30,092 INFO L82 PathProgramCache]: Analyzing trace with hash 933203842, now seen corresponding path program 558 times [2021-07-09 17:36:30,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:30,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78840325] [2021-07-09 17:36:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:30,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:30,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78840325] [2021-07-09 17:36:30,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78840325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:30,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56030019] [2021-07-09 17:36:30,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:30,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:36:30,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:30,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:30,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:30,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:30,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:30,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,334 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 17:36:30,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:36:30,336 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:30,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:30,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,342 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:36:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:30,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56030019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:30,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:30,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:36:30,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260776998] [2021-07-09 17:36:30,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:30,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:30,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:30,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:30,360 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:30,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:30,590 INFO L93 Difference]: Finished difference Result 166 states and 321 transitions. [2021-07-09 17:36:30,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:36:30,591 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:30,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:30,591 INFO L225 Difference]: With dead ends: 166 [2021-07-09 17:36:30,591 INFO L226 Difference]: Without dead ends: 166 [2021-07-09 17:36:30,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:30,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-09 17:36:30,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 105. [2021-07-09 17:36:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-07-09 17:36:30,593 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 19 [2021-07-09 17:36:30,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:30,593 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-07-09 17:36:30,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:30,593 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-07-09 17:36:30,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:30,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:30,593 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:30,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3004 [2021-07-09 17:36:30,793 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:30,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:30,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1591702246, now seen corresponding path program 559 times [2021-07-09 17:36:30,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:30,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934049384] [2021-07-09 17:36:30,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:30,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:30,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934049384] [2021-07-09 17:36:30,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934049384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:30,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836727662] [2021-07-09 17:36:30,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:30,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:36:30,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:30,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836727662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:30,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:30,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-07-09 17:36:30,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516638171] [2021-07-09 17:36:30,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:36:30,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:30,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:36:30,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:36:30,989 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:31,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:31,313 INFO L93 Difference]: Finished difference Result 116 states and 227 transitions. [2021-07-09 17:36:31,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:31,314 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:31,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:31,314 INFO L225 Difference]: With dead ends: 116 [2021-07-09 17:36:31,314 INFO L226 Difference]: Without dead ends: 106 [2021-07-09 17:36:31,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 371.7ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:36:31,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-09 17:36:31,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2021-07-09 17:36:31,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 102 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:31,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 208 transitions. [2021-07-09 17:36:31,315 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 208 transitions. Word has length 19 [2021-07-09 17:36:31,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:31,315 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 208 transitions. [2021-07-09 17:36:31,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:31,315 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 208 transitions. [2021-07-09 17:36:31,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:36:31,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:31,315 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:31,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3006,560 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:31,516 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:31,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:31,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1601710514, now seen corresponding path program 560 times [2021-07-09 17:36:31,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:31,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821003502] [2021-07-09 17:36:31,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:31,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:31,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821003502] [2021-07-09 17:36:31,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821003502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:31,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107673602] [2021-07-09 17:36:31,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:31,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:31,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:31,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:31,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:31,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:36:31,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:31,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:36:31,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:31,710 INFO L628 ElimStorePlain]: treesize reduction 19, result has 38.7 percent of original size [2021-07-09 17:36:31,710 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:36:31,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:31,710 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:12 [2021-07-09 17:36:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:31,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107673602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:31,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:31,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:36:31,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084564306] [2021-07-09 17:36:31,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:31,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:31,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:31,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:31,729 INFO L87 Difference]: Start difference. First operand 103 states and 208 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:31,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:31,878 INFO L93 Difference]: Finished difference Result 123 states and 243 transitions. [2021-07-09 17:36:31,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:31,878 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:36:31,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:31,878 INFO L225 Difference]: With dead ends: 123 [2021-07-09 17:36:31,878 INFO L226 Difference]: Without dead ends: 123 [2021-07-09 17:36:31,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:31,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-09 17:36:31,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2021-07-09 17:36:31,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0) internal successors, (190), 95 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 190 transitions. [2021-07-09 17:36:31,880 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 190 transitions. Word has length 19 [2021-07-09 17:36:31,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:31,880 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 190 transitions. [2021-07-09 17:36:31,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:31,880 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 190 transitions. [2021-07-09 17:36:31,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:31,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:31,880 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:32,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3011 [2021-07-09 17:36:32,080 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:32,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:32,081 INFO L82 PathProgramCache]: Analyzing trace with hash 926464630, now seen corresponding path program 561 times [2021-07-09 17:36:32,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:32,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126866691] [2021-07-09 17:36:32,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:32,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:32,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126866691] [2021-07-09 17:36:32,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126866691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:32,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460394407] [2021-07-09 17:36:32,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:32,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:36:32,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:32,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:36:32,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:32,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:36:32,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:32,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:36:32,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:32,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:32,437 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:36:32,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:32,438 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:76, output treesize:37 [2021-07-09 17:36:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:32,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460394407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:32,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:32,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-07-09 17:36:32,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301802612] [2021-07-09 17:36:32,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:36:32,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:32,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:36:32,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:32,503 INFO L87 Difference]: Start difference. First operand 96 states and 190 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:32,868 INFO L93 Difference]: Finished difference Result 174 states and 331 transitions. [2021-07-09 17:36:32,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:36:32,868 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:32,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:32,868 INFO L225 Difference]: With dead ends: 174 [2021-07-09 17:36:32,868 INFO L226 Difference]: Without dead ends: 167 [2021-07-09 17:36:32,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 505.3ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:32,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-09 17:36:32,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 106. [2021-07-09 17:36:32,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 105 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:32,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 209 transitions. [2021-07-09 17:36:32,870 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 209 transitions. Word has length 20 [2021-07-09 17:36:32,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:32,870 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 209 transitions. [2021-07-09 17:36:32,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:32,870 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 209 transitions. [2021-07-09 17:36:32,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:32,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:32,870 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:33,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3013,562 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:33,071 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:33,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:33,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1503642474, now seen corresponding path program 562 times [2021-07-09 17:36:33,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:33,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426391720] [2021-07-09 17:36:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:33,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:33,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426391720] [2021-07-09 17:36:33,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426391720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:33,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115764426] [2021-07-09 17:36:33,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:33,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:33,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:33,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:33,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:33,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:33,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:33,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:33,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:33,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:33,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:33,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:33,522 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-07-09 17:36:33,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:33,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:36:33,533 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:33,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:33,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:33,542 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:36:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:33,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115764426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:33,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:33,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:36:33,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138184531] [2021-07-09 17:36:33,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:36:33,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:33,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:36:33,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:33,584 INFO L87 Difference]: Start difference. First operand 106 states and 209 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:33,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:33,933 INFO L93 Difference]: Finished difference Result 178 states and 336 transitions. [2021-07-09 17:36:33,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:36:33,933 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:33,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:33,934 INFO L225 Difference]: With dead ends: 178 [2021-07-09 17:36:33,934 INFO L226 Difference]: Without dead ends: 156 [2021-07-09 17:36:33,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 486.3ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:36:33,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-09 17:36:33,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 107. [2021-07-09 17:36:33,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.990566037735849) internal successors, (211), 106 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:33,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 211 transitions. [2021-07-09 17:36:33,935 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 211 transitions. Word has length 20 [2021-07-09 17:36:33,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:33,935 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 211 transitions. [2021-07-09 17:36:33,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:33,935 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 211 transitions. [2021-07-09 17:36:33,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:33,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:33,935 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:34,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3022 [2021-07-09 17:36:34,136 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:34,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:34,136 INFO L82 PathProgramCache]: Analyzing trace with hash 961820850, now seen corresponding path program 563 times [2021-07-09 17:36:34,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:34,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542848817] [2021-07-09 17:36:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:34,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:34,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542848817] [2021-07-09 17:36:34,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542848817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:34,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289607751] [2021-07-09 17:36:34,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:34,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:36:34,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:34,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:34,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:34,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:34,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:34,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:34,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:34,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:34,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:34,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:34,604 INFO L628 ElimStorePlain]: treesize reduction 40, result has 43.7 percent of original size [2021-07-09 17:36:34,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:34,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:36:34,606 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:34,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:34,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:34,613 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:36:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:34,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289607751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:34,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:34,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-07-09 17:36:34,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409709026] [2021-07-09 17:36:34,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:36:34,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:34,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:36:34,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:34,652 INFO L87 Difference]: Start difference. First operand 107 states and 211 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:34,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:34,983 INFO L93 Difference]: Finished difference Result 179 states and 338 transitions. [2021-07-09 17:36:34,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:36:34,984 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:34,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:34,984 INFO L225 Difference]: With dead ends: 179 [2021-07-09 17:36:34,984 INFO L226 Difference]: Without dead ends: 160 [2021-07-09 17:36:34,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 476.8ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:34,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-07-09 17:36:34,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 108. [2021-07-09 17:36:34,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.9906542056074767) internal successors, (213), 107 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:34,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 213 transitions. [2021-07-09 17:36:34,985 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 213 transitions. Word has length 20 [2021-07-09 17:36:34,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:34,985 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 213 transitions. [2021-07-09 17:36:34,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:34,985 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 213 transitions. [2021-07-09 17:36:34,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:34,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:34,986 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:35,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3025 [2021-07-09 17:36:35,186 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:35,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:35,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1914174058, now seen corresponding path program 564 times [2021-07-09 17:36:35,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:35,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714793744] [2021-07-09 17:36:35,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:35,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:35,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714793744] [2021-07-09 17:36:35,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714793744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:35,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920098391] [2021-07-09 17:36:35,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:35,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:36:35,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:35,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:36:35,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:35,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:35,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:35,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:35,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:36:35,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:35,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:35,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:35,652 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 17:36:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:35,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920098391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:35,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:35,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:36:35,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863969393] [2021-07-09 17:36:35,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:36:35,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:35,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:36:35,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:35,694 INFO L87 Difference]: Start difference. First operand 108 states and 213 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:36,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:36,003 INFO L93 Difference]: Finished difference Result 180 states and 343 transitions. [2021-07-09 17:36:36,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:36:36,003 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:36,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:36,004 INFO L225 Difference]: With dead ends: 180 [2021-07-09 17:36:36,004 INFO L226 Difference]: Without dead ends: 173 [2021-07-09 17:36:36,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 460.8ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:36,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-07-09 17:36:36,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 109. [2021-07-09 17:36:36,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0) internal successors, (216), 108 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:36,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 216 transitions. [2021-07-09 17:36:36,005 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 216 transitions. Word has length 20 [2021-07-09 17:36:36,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:36,005 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 216 transitions. [2021-07-09 17:36:36,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:36,005 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 216 transitions. [2021-07-09 17:36:36,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:36,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:36,005 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:36,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3028,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:36,206 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:36,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:36,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1518788174, now seen corresponding path program 565 times [2021-07-09 17:36:36,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:36,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743456594] [2021-07-09 17:36:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:36,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:36,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743456594] [2021-07-09 17:36:36,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743456594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:36,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206787847] [2021-07-09 17:36:36,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:36,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:36,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:36,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:36,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:36,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:36,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:36,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:36,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:36,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:36,707 INFO L628 ElimStorePlain]: treesize reduction 34, result has 47.7 percent of original size [2021-07-09 17:36:36,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:36,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:36:36,709 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:36,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:36,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:36,716 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:36:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:36,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206787847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:36,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:36,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-07-09 17:36:36,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608381533] [2021-07-09 17:36:36,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:36:36,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:36,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:36:36,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:36,754 INFO L87 Difference]: Start difference. First operand 109 states and 216 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:37,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:37,198 INFO L93 Difference]: Finished difference Result 200 states and 380 transitions. [2021-07-09 17:36:37,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:36:37,198 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:37,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:37,201 INFO L225 Difference]: With dead ends: 200 [2021-07-09 17:36:37,201 INFO L226 Difference]: Without dead ends: 178 [2021-07-09 17:36:37,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 531.0ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:36:37,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-07-09 17:36:37,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 111. [2021-07-09 17:36:37,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 110 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:37,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 221 transitions. [2021-07-09 17:36:37,202 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 221 transitions. Word has length 20 [2021-07-09 17:36:37,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:37,202 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 221 transitions. [2021-07-09 17:36:37,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:37,202 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 221 transitions. [2021-07-09 17:36:37,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:37,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:37,202 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:37,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3032 [2021-07-09 17:36:37,403 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:37,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:37,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1079331238, now seen corresponding path program 566 times [2021-07-09 17:36:37,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:37,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145490878] [2021-07-09 17:36:37,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:37,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:37,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145490878] [2021-07-09 17:36:37,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145490878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:37,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417968571] [2021-07-09 17:36:37,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:37,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:37,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:37,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:37,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:37,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:37,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:37,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:37,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:37,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:37,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:37,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:37,828 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-07-09 17:36:37,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:37,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:36:37,831 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:37,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:37,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:37,840 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:36:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:37,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417968571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:37,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:37,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:36:37,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94761968] [2021-07-09 17:36:37,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:36:37,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:37,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:36:37,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:37,880 INFO L87 Difference]: Start difference. First operand 111 states and 221 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:38,091 INFO L93 Difference]: Finished difference Result 153 states and 291 transitions. [2021-07-09 17:36:38,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:36:38,091 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:38,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:38,091 INFO L225 Difference]: With dead ends: 153 [2021-07-09 17:36:38,091 INFO L226 Difference]: Without dead ends: 131 [2021-07-09 17:36:38,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 356.9ms TimeCoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:36:38,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-09 17:36:38,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2021-07-09 17:36:38,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 112 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:38,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 225 transitions. [2021-07-09 17:36:38,093 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 225 transitions. Word has length 20 [2021-07-09 17:36:38,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:38,093 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 225 transitions. [2021-07-09 17:36:38,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:38,093 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 225 transitions. [2021-07-09 17:36:38,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:38,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:38,093 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:38,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3036,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:38,293 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:38,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:38,293 INFO L82 PathProgramCache]: Analyzing trace with hash 537509614, now seen corresponding path program 567 times [2021-07-09 17:36:38,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:38,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163548074] [2021-07-09 17:36:38,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:38,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:38,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163548074] [2021-07-09 17:36:38,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163548074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:38,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787310474] [2021-07-09 17:36:38,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:38,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:36:38,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:38,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:38,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:38,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:38,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:38,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:38,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:38,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:38,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:38,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:38,722 INFO L628 ElimStorePlain]: treesize reduction 40, result has 43.7 percent of original size [2021-07-09 17:36:38,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:38,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:36:38,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:38,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:38,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:38,731 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:36:38,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:38,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787310474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:38,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:38,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-07-09 17:36:38,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681071815] [2021-07-09 17:36:38,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:36:38,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:38,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:36:38,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:38,769 INFO L87 Difference]: Start difference. First operand 113 states and 225 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:39,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:39,024 INFO L93 Difference]: Finished difference Result 151 states and 288 transitions. [2021-07-09 17:36:39,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:36:39,025 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:39,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:39,025 INFO L225 Difference]: With dead ends: 151 [2021-07-09 17:36:39,025 INFO L226 Difference]: Without dead ends: 132 [2021-07-09 17:36:39,025 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 365.1ms TimeCoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:39,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-07-09 17:36:39,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2021-07-09 17:36:39,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 113 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 227 transitions. [2021-07-09 17:36:39,026 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 227 transitions. Word has length 20 [2021-07-09 17:36:39,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:39,026 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 227 transitions. [2021-07-09 17:36:39,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:39,026 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 227 transitions. [2021-07-09 17:36:39,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:39,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:39,027 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:39,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3039,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:39,227 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:39,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:39,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1489862822, now seen corresponding path program 568 times [2021-07-09 17:36:39,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:39,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156484468] [2021-07-09 17:36:39,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:39,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:39,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156484468] [2021-07-09 17:36:39,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156484468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:39,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482340510] [2021-07-09 17:36:39,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:39,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:39,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:39,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:39,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:39,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:39,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:39,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:39,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:39,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:39,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:39,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:39,652 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-07-09 17:36:39,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:39,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:39,655 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:39,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:39,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:39,662 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:36:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:39,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482340510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:39,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:39,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:36:39,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582186066] [2021-07-09 17:36:39,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:36:39,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:39,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:36:39,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:39,704 INFO L87 Difference]: Start difference. First operand 114 states and 227 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:39,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:39,958 INFO L93 Difference]: Finished difference Result 149 states and 285 transitions. [2021-07-09 17:36:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:36:39,958 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:39,959 INFO L225 Difference]: With dead ends: 149 [2021-07-09 17:36:39,959 INFO L226 Difference]: Without dead ends: 133 [2021-07-09 17:36:39,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 364.5ms TimeCoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:36:39,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-09 17:36:39,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2021-07-09 17:36:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.008771929824561) internal successors, (229), 114 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:39,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 229 transitions. [2021-07-09 17:36:39,960 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 229 transitions. Word has length 20 [2021-07-09 17:36:39,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:39,960 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 229 transitions. [2021-07-09 17:36:39,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:39,960 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 229 transitions. [2021-07-09 17:36:39,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:39,960 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:39,960 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:40,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3043 [2021-07-09 17:36:40,161 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:40,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:40,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1943099410, now seen corresponding path program 569 times [2021-07-09 17:36:40,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:40,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222885919] [2021-07-09 17:36:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:40,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:40,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222885919] [2021-07-09 17:36:40,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222885919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:40,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432768773] [2021-07-09 17:36:40,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:40,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:36:40,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:40,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:40,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:40,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:40,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:40,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:40,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:40,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:40,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:40,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:40,629 INFO L628 ElimStorePlain]: treesize reduction 46, result has 35.2 percent of original size [2021-07-09 17:36:40,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:40,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:36:40,632 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:40,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:40,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:40,639 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:36:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:40,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432768773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:40,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:40,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:36:40,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843946564] [2021-07-09 17:36:40,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:36:40,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:40,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:36:40,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:40,681 INFO L87 Difference]: Start difference. First operand 115 states and 229 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:41,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:41,067 INFO L93 Difference]: Finished difference Result 150 states and 291 transitions. [2021-07-09 17:36:41,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:36:41,067 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:41,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:41,068 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:36:41,068 INFO L226 Difference]: Without dead ends: 137 [2021-07-09 17:36:41,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 421.3ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:36:41,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-09 17:36:41,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 116. [2021-07-09 17:36:41,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.008695652173913) internal successors, (231), 115 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:41,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 231 transitions. [2021-07-09 17:36:41,069 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 231 transitions. Word has length 20 [2021-07-09 17:36:41,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:41,069 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 231 transitions. [2021-07-09 17:36:41,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:41,069 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 231 transitions. [2021-07-09 17:36:41,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:41,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:41,069 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:41,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3046,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:41,270 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:41,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:41,270 INFO L82 PathProgramCache]: Analyzing trace with hash -806914138, now seen corresponding path program 570 times [2021-07-09 17:36:41,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:41,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536362711] [2021-07-09 17:36:41,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:41,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:41,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536362711] [2021-07-09 17:36:41,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536362711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:41,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852031383] [2021-07-09 17:36:41,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:41,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:36:41,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:41,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:41,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:41,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:41,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:41,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:41,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:41,786 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:36:41,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:41,790 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:41,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:41,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:41,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:41,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:41,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:36:41,839 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:41,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:41,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:41,860 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:36:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:41,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852031383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:41,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:41,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:36:41,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325755561] [2021-07-09 17:36:41,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:36:41,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:41,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:36:41,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:41,942 INFO L87 Difference]: Start difference. First operand 116 states and 231 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:42,364 INFO L93 Difference]: Finished difference Result 169 states and 318 transitions. [2021-07-09 17:36:42,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:36:42,364 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:42,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:42,364 INFO L225 Difference]: With dead ends: 169 [2021-07-09 17:36:42,364 INFO L226 Difference]: Without dead ends: 150 [2021-07-09 17:36:42,364 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 549.2ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:42,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-07-09 17:36:42,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 118. [2021-07-09 17:36:42,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.0256410256410255) internal successors, (237), 117 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:42,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 237 transitions. [2021-07-09 17:36:42,366 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 237 transitions. Word has length 20 [2021-07-09 17:36:42,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:42,366 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 237 transitions. [2021-07-09 17:36:42,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:42,366 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 237 transitions. [2021-07-09 17:36:42,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:42,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:42,366 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:42,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3050 [2021-07-09 17:36:42,566 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:42,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:42,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1152433290, now seen corresponding path program 571 times [2021-07-09 17:36:42,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:42,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560666266] [2021-07-09 17:36:42,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:42,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:42,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560666266] [2021-07-09 17:36:42,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560666266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:42,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865647285] [2021-07-09 17:36:42,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:42,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:42,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:42,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:42,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:42,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:42,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:42,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:42,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:42,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:42,940 INFO L628 ElimStorePlain]: treesize reduction 46, result has 35.2 percent of original size [2021-07-09 17:36:42,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:42,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:36:42,943 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:42,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:42,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:42,950 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:36:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:42,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865647285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:42,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:42,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:36:42,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890776234] [2021-07-09 17:36:42,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:36:42,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:42,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:36:42,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:42,990 INFO L87 Difference]: Start difference. First operand 118 states and 237 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:43,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:43,262 INFO L93 Difference]: Finished difference Result 159 states and 306 transitions. [2021-07-09 17:36:43,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:36:43,262 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:43,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:43,262 INFO L225 Difference]: With dead ends: 159 [2021-07-09 17:36:43,262 INFO L226 Difference]: Without dead ends: 140 [2021-07-09 17:36:43,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 364.7ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:43,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-07-09 17:36:43,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 122. [2021-07-09 17:36:43,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.024793388429752) internal successors, (245), 121 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:43,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 245 transitions. [2021-07-09 17:36:43,264 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 245 transitions. Word has length 20 [2021-07-09 17:36:43,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:43,264 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 245 transitions. [2021-07-09 17:36:43,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:43,264 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 245 transitions. [2021-07-09 17:36:43,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:43,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:43,264 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:43,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3055 [2021-07-09 17:36:43,465 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:43,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:43,465 INFO L82 PathProgramCache]: Analyzing trace with hash -200080082, now seen corresponding path program 572 times [2021-07-09 17:36:43,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:43,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191503979] [2021-07-09 17:36:43,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:43,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:43,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191503979] [2021-07-09 17:36:43,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191503979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:43,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693763142] [2021-07-09 17:36:43,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:43,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:43,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:43,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:43,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:43,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:43,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:43,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:43,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:43,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:43,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:43,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:43,856 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-07-09 17:36:43,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:43,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:36:43,859 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:43,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:43,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:43,866 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:36:43,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:43,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693763142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:43,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:43,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-07-09 17:36:43,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150942700] [2021-07-09 17:36:43,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:36:43,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:43,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:36:43,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:43,907 INFO L87 Difference]: Start difference. First operand 122 states and 245 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:44,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:44,207 INFO L93 Difference]: Finished difference Result 158 states and 305 transitions. [2021-07-09 17:36:44,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:36:44,207 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:44,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:44,207 INFO L225 Difference]: With dead ends: 158 [2021-07-09 17:36:44,207 INFO L226 Difference]: Without dead ends: 142 [2021-07-09 17:36:44,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 401.4ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:44,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-07-09 17:36:44,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 123. [2021-07-09 17:36:44,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.0245901639344264) internal successors, (247), 122 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 247 transitions. [2021-07-09 17:36:44,209 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 247 transitions. Word has length 20 [2021-07-09 17:36:44,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:44,209 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 247 transitions. [2021-07-09 17:36:44,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:44,209 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 247 transitions. [2021-07-09 17:36:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:44,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:44,209 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:44,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3059,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:44,409 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:44,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:44,410 INFO L82 PathProgramCache]: Analyzing trace with hash 661924982, now seen corresponding path program 573 times [2021-07-09 17:36:44,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:44,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784843733] [2021-07-09 17:36:44,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:44,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:44,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784843733] [2021-07-09 17:36:44,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784843733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:44,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34245258] [2021-07-09 17:36:44,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:44,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:36:44,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:44,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:44,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:44,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:44,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:44,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:44,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:44,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:44,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:44,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:44,863 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-07-09 17:36:44,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:44,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:44,866 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:44,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:44,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:44,873 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:36:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:44,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34245258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:44,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:44,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:36:44,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725868882] [2021-07-09 17:36:44,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:36:44,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:44,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:36:44,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:44,915 INFO L87 Difference]: Start difference. First operand 123 states and 247 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:45,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:45,466 INFO L93 Difference]: Finished difference Result 160 states and 313 transitions. [2021-07-09 17:36:45,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:36:45,467 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:45,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:45,467 INFO L225 Difference]: With dead ends: 160 [2021-07-09 17:36:45,467 INFO L226 Difference]: Without dead ends: 147 [2021-07-09 17:36:45,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 541.9ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:36:45,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-09 17:36:45,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2021-07-09 17:36:45,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.024390243902439) internal successors, (249), 123 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:45,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 249 transitions. [2021-07-09 17:36:45,468 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 249 transitions. Word has length 20 [2021-07-09 17:36:45,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:45,469 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 249 transitions. [2021-07-09 17:36:45,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:45,469 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 249 transitions. [2021-07-09 17:36:45,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:45,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:45,469 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:45,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3063 [2021-07-09 17:36:45,669 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:45,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:45,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1798110254, now seen corresponding path program 574 times [2021-07-09 17:36:45,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:45,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817774373] [2021-07-09 17:36:45,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:45,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:45,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817774373] [2021-07-09 17:36:45,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817774373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:45,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861148341] [2021-07-09 17:36:45,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:45,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:45,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:45,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:45,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:46,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:46,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:46,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:46,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:46,111 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:36:46,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:46,115 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:46,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:46,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:46,140 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:46,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:46,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:36:46,165 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:46,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:46,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:46,185 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:36:46,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:46,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861148341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:46,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:46,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:36:46,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415177383] [2021-07-09 17:36:46,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:36:46,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:46,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:36:46,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:46,265 INFO L87 Difference]: Start difference. First operand 124 states and 249 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:46,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:46,782 INFO L93 Difference]: Finished difference Result 180 states and 342 transitions. [2021-07-09 17:36:46,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:36:46,782 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:46,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:46,782 INFO L225 Difference]: With dead ends: 180 [2021-07-09 17:36:46,782 INFO L226 Difference]: Without dead ends: 161 [2021-07-09 17:36:46,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 522.3ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:36:46,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-09 17:36:46,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2021-07-09 17:36:46,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.025) internal successors, (243), 120 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 243 transitions. [2021-07-09 17:36:46,784 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 243 transitions. Word has length 20 [2021-07-09 17:36:46,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:46,784 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 243 transitions. [2021-07-09 17:36:46,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:46,784 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 243 transitions. [2021-07-09 17:36:46,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:46,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:46,784 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:46,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 575 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-07-09 17:36:46,985 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:46,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:46,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1085878362, now seen corresponding path program 575 times [2021-07-09 17:36:46,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:46,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120057207] [2021-07-09 17:36:46,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:47,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:47,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120057207] [2021-07-09 17:36:47,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120057207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:47,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084572304] [2021-07-09 17:36:47,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:47,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:36:47,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:47,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:47,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:47,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:47,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:47,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:47,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:47,351 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-07-09 17:36:47,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:47,354 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:47,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:47,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:47,361 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:36:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:47,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084572304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:47,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:47,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-07-09 17:36:47,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824038405] [2021-07-09 17:36:47,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:36:47,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:47,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:36:47,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:47,397 INFO L87 Difference]: Start difference. First operand 121 states and 243 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:47,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:47,721 INFO L93 Difference]: Finished difference Result 163 states and 315 transitions. [2021-07-09 17:36:47,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:36:47,721 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:47,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:47,722 INFO L225 Difference]: With dead ends: 163 [2021-07-09 17:36:47,722 INFO L226 Difference]: Without dead ends: 147 [2021-07-09 17:36:47,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 403.1ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:36:47,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-09 17:36:47,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 128. [2021-07-09 17:36:47,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.0236220472440944) internal successors, (257), 127 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:47,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 257 transitions. [2021-07-09 17:36:47,723 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 257 transitions. Word has length 20 [2021-07-09 17:36:47,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:47,723 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 257 transitions. [2021-07-09 17:36:47,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 257 transitions. [2021-07-09 17:36:47,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:47,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:47,723 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:47,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3072 [2021-07-09 17:36:47,924 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:47,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:47,924 INFO L82 PathProgramCache]: Analyzing trace with hash -223873298, now seen corresponding path program 576 times [2021-07-09 17:36:47,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:47,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462346683] [2021-07-09 17:36:47,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:48,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:48,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462346683] [2021-07-09 17:36:48,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462346683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:48,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619945020] [2021-07-09 17:36:48,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:48,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:36:48,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:48,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:48,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:48,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:48,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:48,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:48,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:48,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:48,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:48,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:48,332 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-07-09 17:36:48,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:48,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:36:48,335 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:48,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:48,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:48,342 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:36:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:48,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619945020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:48,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:48,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:36:48,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057652756] [2021-07-09 17:36:48,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:36:48,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:48,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:36:48,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:48,388 INFO L87 Difference]: Start difference. First operand 128 states and 257 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:48,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:48,956 INFO L93 Difference]: Finished difference Result 166 states and 325 transitions. [2021-07-09 17:36:48,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:36:48,957 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:48,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:48,957 INFO L225 Difference]: With dead ends: 166 [2021-07-09 17:36:48,957 INFO L226 Difference]: Without dead ends: 153 [2021-07-09 17:36:48,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 551.8ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:36:48,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-09 17:36:48,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2021-07-09 17:36:48,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.0234375) internal successors, (259), 128 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 259 transitions. [2021-07-09 17:36:48,958 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 259 transitions. Word has length 20 [2021-07-09 17:36:48,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:48,959 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 259 transitions. [2021-07-09 17:36:48,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:48,959 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 259 transitions. [2021-07-09 17:36:48,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:48,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:48,959 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:49,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 577 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3076 [2021-07-09 17:36:49,159 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:49,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:49,160 INFO L82 PathProgramCache]: Analyzing trace with hash 912311974, now seen corresponding path program 577 times [2021-07-09 17:36:49,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:49,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215245598] [2021-07-09 17:36:49,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:49,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:49,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215245598] [2021-07-09 17:36:49,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215245598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:49,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707078819] [2021-07-09 17:36:49,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:49,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:49,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:49,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:49,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:49,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:49,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:49,575 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-07-09 17:36:49,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:36:49,579 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:49,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:49,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:49,605 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:49,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:49,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:36:49,628 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:49,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:49,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:49,649 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:36:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:49,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707078819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:49,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:49,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:36:49,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43387101] [2021-07-09 17:36:49,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:36:49,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:49,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:36:49,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:49,729 INFO L87 Difference]: Start difference. First operand 129 states and 259 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:50,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:50,298 INFO L93 Difference]: Finished difference Result 187 states and 356 transitions. [2021-07-09 17:36:50,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:36:50,299 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:50,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:50,299 INFO L225 Difference]: With dead ends: 187 [2021-07-09 17:36:50,299 INFO L226 Difference]: Without dead ends: 168 [2021-07-09 17:36:50,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 583.1ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:36:50,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-09 17:36:50,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 127. [2021-07-09 17:36:50,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.0238095238095237) internal successors, (255), 126 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:50,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 255 transitions. [2021-07-09 17:36:50,300 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 255 transitions. Word has length 20 [2021-07-09 17:36:50,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:50,300 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 255 transitions. [2021-07-09 17:36:50,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:50,301 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 255 transitions. [2021-07-09 17:36:50,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:50,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:50,301 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:50,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3080 [2021-07-09 17:36:50,501 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:50,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:50,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1964309878, now seen corresponding path program 578 times [2021-07-09 17:36:50,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:50,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000468901] [2021-07-09 17:36:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:50,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:50,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000468901] [2021-07-09 17:36:50,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000468901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:50,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944771843] [2021-07-09 17:36:50,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:50,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:50,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:50,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:50,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:50,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:50,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:50,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:50,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:50,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:50,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:50,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:50,888 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-07-09 17:36:50,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:50,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:36:50,891 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:50,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:50,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:50,898 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:36:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:50,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944771843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:50,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:50,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:36:50,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142604981] [2021-07-09 17:36:50,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:36:50,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:50,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:36:50,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:50,939 INFO L87 Difference]: Start difference. First operand 127 states and 255 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:51,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:51,532 INFO L93 Difference]: Finished difference Result 171 states and 335 transitions. [2021-07-09 17:36:51,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:36:51,532 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:51,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:51,532 INFO L225 Difference]: With dead ends: 171 [2021-07-09 17:36:51,532 INFO L226 Difference]: Without dead ends: 158 [2021-07-09 17:36:51,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 550.9ms TimeCoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:36:51,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-09 17:36:51,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 135. [2021-07-09 17:36:51,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 134 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:51,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 271 transitions. [2021-07-09 17:36:51,534 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 271 transitions. Word has length 20 [2021-07-09 17:36:51,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:51,534 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 271 transitions. [2021-07-09 17:36:51,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:51,534 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 271 transitions. [2021-07-09 17:36:51,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:51,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:51,534 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:51,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 579 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3085 [2021-07-09 17:36:51,735 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:51,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:51,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1194472146, now seen corresponding path program 579 times [2021-07-09 17:36:51,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:51,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511268063] [2021-07-09 17:36:51,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:51,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:51,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511268063] [2021-07-09 17:36:51,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511268063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:51,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116507353] [2021-07-09 17:36:51,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:51,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:36:51,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:51,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:51,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:52,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:52,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:52,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:52,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:52,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:52,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:52,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:52,149 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:36:52,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:52,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:36:52,153 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:52,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:52,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:52,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:52,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:52,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:52,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:52,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:36:52,208 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:52,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:52,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:52,228 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:36:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:52,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116507353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:52,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:52,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:36:52,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699794561] [2021-07-09 17:36:52,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:36:52,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:52,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:36:52,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:52,310 INFO L87 Difference]: Start difference. First operand 135 states and 271 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:53,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:53,132 INFO L93 Difference]: Finished difference Result 193 states and 368 transitions. [2021-07-09 17:36:53,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:36:53,133 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:53,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:53,133 INFO L225 Difference]: With dead ends: 193 [2021-07-09 17:36:53,133 INFO L226 Difference]: Without dead ends: 174 [2021-07-09 17:36:53,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 770.2ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:36:53,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-09 17:36:53,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 134. [2021-07-09 17:36:53,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.0225563909774436) internal successors, (269), 133 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:53,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 269 transitions. [2021-07-09 17:36:53,135 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 269 transitions. Word has length 20 [2021-07-09 17:36:53,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:53,135 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 269 transitions. [2021-07-09 17:36:53,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:53,135 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 269 transitions. [2021-07-09 17:36:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:53,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:53,135 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:53,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3089 [2021-07-09 17:36:53,335 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:53,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:53,336 INFO L82 PathProgramCache]: Analyzing trace with hash 954324390, now seen corresponding path program 580 times [2021-07-09 17:36:53,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:53,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776292788] [2021-07-09 17:36:53,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:53,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:53,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776292788] [2021-07-09 17:36:53,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776292788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:53,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443254477] [2021-07-09 17:36:53,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:53,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:53,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:53,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:53,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:53,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:53,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:53,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:53,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:53,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:53,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:53,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:53,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:53,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:53,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:53,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:53,670 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:53,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:53,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:53,673 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:53,723 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-07-09 17:36:53,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:53,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:53,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:53,726 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:53,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:53,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:36:53,730 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:53,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:53,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:53,752 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:36:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:53,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443254477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:53,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:53,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:36:53,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706186678] [2021-07-09 17:36:53,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:36:53,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:53,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:36:53,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:53,832 INFO L87 Difference]: Start difference. First operand 134 states and 269 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:54,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:54,641 INFO L93 Difference]: Finished difference Result 202 states and 391 transitions. [2021-07-09 17:36:54,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:36:54,641 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:54,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:54,641 INFO L225 Difference]: With dead ends: 202 [2021-07-09 17:36:54,641 INFO L226 Difference]: Without dead ends: 183 [2021-07-09 17:36:54,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 818.8ms TimeCoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:36:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-09 17:36:54,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 136. [2021-07-09 17:36:54,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.0296296296296297) internal successors, (274), 135 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:54,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 274 transitions. [2021-07-09 17:36:54,643 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 274 transitions. Word has length 20 [2021-07-09 17:36:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:54,643 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 274 transitions. [2021-07-09 17:36:54,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:54,643 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 274 transitions. [2021-07-09 17:36:54,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:54,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:54,643 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:54,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3094,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:54,844 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:54,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:54,844 INFO L82 PathProgramCache]: Analyzing trace with hash 810584810, now seen corresponding path program 581 times [2021-07-09 17:36:54,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:54,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588592491] [2021-07-09 17:36:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:54,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:54,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588592491] [2021-07-09 17:36:54,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588592491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:54,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969816215] [2021-07-09 17:36:54,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:54,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:36:54,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:54,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:54,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:55,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:55,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:55,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:55,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:55,211 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-07-09 17:36:55,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:36:55,214 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:55,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:55,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:55,221 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:36:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:55,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969816215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:55,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:55,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:36:55,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230271724] [2021-07-09 17:36:55,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:36:55,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:55,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:36:55,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:55,260 INFO L87 Difference]: Start difference. First operand 136 states and 274 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:55,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:55,580 INFO L93 Difference]: Finished difference Result 170 states and 337 transitions. [2021-07-09 17:36:55,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:36:55,580 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:55,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:55,580 INFO L225 Difference]: With dead ends: 170 [2021-07-09 17:36:55,580 INFO L226 Difference]: Without dead ends: 148 [2021-07-09 17:36:55,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 350.7ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:55,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-07-09 17:36:55,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 137. [2021-07-09 17:36:55,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.0294117647058822) internal successors, (276), 136 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 276 transitions. [2021-07-09 17:36:55,582 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 276 transitions. Word has length 20 [2021-07-09 17:36:55,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:55,582 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 276 transitions. [2021-07-09 17:36:55,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:55,582 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 276 transitions. [2021-07-09 17:36:55,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:55,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:55,582 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:55,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3097 [2021-07-09 17:36:55,783 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:55,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:55,783 INFO L82 PathProgramCache]: Analyzing trace with hash 268763186, now seen corresponding path program 582 times [2021-07-09 17:36:55,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:55,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044507498] [2021-07-09 17:36:55,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:55,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:55,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044507498] [2021-07-09 17:36:55,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044507498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:55,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179048597] [2021-07-09 17:36:55,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:55,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:36:55,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:55,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:36:55,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:56,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:56,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:56,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:56,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:56,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:56,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:36:56,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:56,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:56,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:56,157 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 17:36:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:56,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179048597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:56,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:56,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:36:56,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16709159] [2021-07-09 17:36:56,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:36:56,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:56,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:36:56,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:56,196 INFO L87 Difference]: Start difference. First operand 137 states and 276 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:56,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:56,523 INFO L93 Difference]: Finished difference Result 167 states and 334 transitions. [2021-07-09 17:36:56,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:36:56,523 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:56,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:56,524 INFO L225 Difference]: With dead ends: 167 [2021-07-09 17:36:56,524 INFO L226 Difference]: Without dead ends: 160 [2021-07-09 17:36:56,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 366.4ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:56,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-07-09 17:36:56,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 138. [2021-07-09 17:36:56,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0364963503649633) internal successors, (279), 137 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:56,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 279 transitions. [2021-07-09 17:36:56,525 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 279 transitions. Word has length 20 [2021-07-09 17:36:56,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:56,525 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 279 transitions. [2021-07-09 17:36:56,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:56,525 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 279 transitions. [2021-07-09 17:36:56,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:56,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:56,526 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:56,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3100 [2021-07-09 17:36:56,726 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:56,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:56,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1221116394, now seen corresponding path program 583 times [2021-07-09 17:36:56,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:56,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971920548] [2021-07-09 17:36:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:56,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:56,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971920548] [2021-07-09 17:36:56,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971920548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:56,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755593413] [2021-07-09 17:36:56,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:57,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:57,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:57,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:57,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:57,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:57,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:57,288 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-07-09 17:36:57,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:36:57,291 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:57,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:57,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:57,299 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:36:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:57,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755593413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:57,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:57,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:36:57,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327426015] [2021-07-09 17:36:57,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:36:57,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:57,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:36:57,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:36:57,343 INFO L87 Difference]: Start difference. First operand 138 states and 279 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:57,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:57,630 INFO L93 Difference]: Finished difference Result 164 states and 320 transitions. [2021-07-09 17:36:57,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:36:57,630 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:57,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:57,631 INFO L225 Difference]: With dead ends: 164 [2021-07-09 17:36:57,631 INFO L226 Difference]: Without dead ends: 148 [2021-07-09 17:36:57,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 530.7ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:57,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-07-09 17:36:57,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 139. [2021-07-09 17:36:57,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.036231884057971) internal successors, (281), 138 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 281 transitions. [2021-07-09 17:36:57,632 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 281 transitions. Word has length 20 [2021-07-09 17:36:57,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:57,632 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 281 transitions. [2021-07-09 17:36:57,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:57,632 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 281 transitions. [2021-07-09 17:36:57,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:57,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:57,632 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:57,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3103,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:57,845 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:57,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:57,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2083121458, now seen corresponding path program 584 times [2021-07-09 17:36:57,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:57,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312914485] [2021-07-09 17:36:57,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:58,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:58,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312914485] [2021-07-09 17:36:58,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312914485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:58,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538848130] [2021-07-09 17:36:58,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:58,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:58,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:58,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:58,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:58,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:58,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:58,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:58,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:58,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:58,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:58,292 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:58,312 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-07-09 17:36:58,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:58,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:36:58,315 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:58,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:58,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:36:58,322 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:36:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:58,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538848130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:58,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:58,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:36:58,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143054839] [2021-07-09 17:36:58,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:36:58,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:58,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:36:58,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:58,359 INFO L87 Difference]: Start difference. First operand 139 states and 281 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:58,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:58,669 INFO L93 Difference]: Finished difference Result 166 states and 324 transitions. [2021-07-09 17:36:58,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:36:58,669 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:58,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:58,670 INFO L225 Difference]: With dead ends: 166 [2021-07-09 17:36:58,670 INFO L226 Difference]: Without dead ends: 153 [2021-07-09 17:36:58,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:36:58,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-09 17:36:58,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 140. [2021-07-09 17:36:58,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.035971223021583) internal successors, (283), 139 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:58,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 283 transitions. [2021-07-09 17:36:58,671 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 283 transitions. Word has length 20 [2021-07-09 17:36:58,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:58,671 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 283 transitions. [2021-07-09 17:36:58,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:58,671 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 283 transitions. [2021-07-09 17:36:58,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:58,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:58,672 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:58,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3107 [2021-07-09 17:36:58,872 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:58,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:58,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1075660566, now seen corresponding path program 585 times [2021-07-09 17:36:58,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:58,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334362032] [2021-07-09 17:36:58,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:59,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:59,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334362032] [2021-07-09 17:36:59,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334362032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:59,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853019280] [2021-07-09 17:36:59,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:59,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:36:59,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:59,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:59,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:59,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:59,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:59,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,416 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:36:59,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:59,420 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:59,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:59,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:59,445 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:59,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:36:59,469 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:36:59,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:59,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:59,490 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:36:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:59,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853019280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:59,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:59,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:36:59,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057127149] [2021-07-09 17:36:59,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:36:59,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:59,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:36:59,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:36:59,588 INFO L87 Difference]: Start difference. First operand 140 states and 283 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:00,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:00,134 INFO L93 Difference]: Finished difference Result 192 states and 367 transitions. [2021-07-09 17:37:00,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:37:00,134 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:00,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:00,135 INFO L225 Difference]: With dead ends: 192 [2021-07-09 17:37:00,135 INFO L226 Difference]: Without dead ends: 173 [2021-07-09 17:37:00,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 647.5ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:37:00,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-07-09 17:37:00,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 138. [2021-07-09 17:37:00,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0364963503649633) internal successors, (279), 137 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:00,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 279 transitions. [2021-07-09 17:37:00,136 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 279 transitions. Word has length 20 [2021-07-09 17:37:00,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:00,136 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 279 transitions. [2021-07-09 17:37:00,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:00,136 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 279 transitions. [2021-07-09 17:37:00,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:00,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:00,137 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:00,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3110 [2021-07-09 17:37:00,353 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:00,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:00,353 INFO L82 PathProgramCache]: Analyzing trace with hash 2025165106, now seen corresponding path program 586 times [2021-07-09 17:37:00,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:00,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876664833] [2021-07-09 17:37:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:00,537 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:00,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:00,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876664833] [2021-07-09 17:37:00,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876664833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:00,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734646817] [2021-07-09 17:37:00,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:00,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:00,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:00,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:00,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:00,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:00,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:00,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:00,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:00,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:00,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:00,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:00,769 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-07-09 17:37:00,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:00,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:00,772 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:00,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:00,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:00,780 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:37:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:00,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734646817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:00,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:00,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:37:00,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048111188] [2021-07-09 17:37:00,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:37:00,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:00,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:37:00,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:37:00,818 INFO L87 Difference]: Start difference. First operand 138 states and 279 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:01,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:01,090 INFO L93 Difference]: Finished difference Result 161 states and 315 transitions. [2021-07-09 17:37:01,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:37:01,091 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:01,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:01,091 INFO L225 Difference]: With dead ends: 161 [2021-07-09 17:37:01,091 INFO L226 Difference]: Without dead ends: 142 [2021-07-09 17:37:01,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 367.4ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:01,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-07-09 17:37:01,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2021-07-09 17:37:01,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.035971223021583) internal successors, (283), 139 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:01,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 283 transitions. [2021-07-09 17:37:01,092 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 283 transitions. Word has length 20 [2021-07-09 17:37:01,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:01,092 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 283 transitions. [2021-07-09 17:37:01,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:01,093 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 283 transitions. [2021-07-09 17:37:01,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:01,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:01,093 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:01,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3115,587 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:01,293 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:01,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:01,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1317448982, now seen corresponding path program 587 times [2021-07-09 17:37:01,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:01,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861507883] [2021-07-09 17:37:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:01,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:01,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861507883] [2021-07-09 17:37:01,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861507883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:01,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692007423] [2021-07-09 17:37:01,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:01,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:01,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:01,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:01,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:01,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:01,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:01,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:01,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:01,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:01,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:01,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:01,711 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-07-09 17:37:01,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:01,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:01,714 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:01,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:01,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:01,721 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:37:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:01,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692007423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:01,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:01,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:37:01,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360525540] [2021-07-09 17:37:01,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:37:01,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:01,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:37:01,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:01,763 INFO L87 Difference]: Start difference. First operand 140 states and 283 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:02,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:02,130 INFO L93 Difference]: Finished difference Result 160 states and 314 transitions. [2021-07-09 17:37:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:37:02,130 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:02,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:02,130 INFO L225 Difference]: With dead ends: 160 [2021-07-09 17:37:02,130 INFO L226 Difference]: Without dead ends: 144 [2021-07-09 17:37:02,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 445.6ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:37:02,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-09 17:37:02,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2021-07-09 17:37:02,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.0357142857142856) internal successors, (285), 140 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:02,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 285 transitions. [2021-07-09 17:37:02,132 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 285 transitions. Word has length 20 [2021-07-09 17:37:02,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:02,132 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 285 transitions. [2021-07-09 17:37:02,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:02,132 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 285 transitions. [2021-07-09 17:37:02,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:02,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:02,132 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:02,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3118,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:02,332 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:02,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:02,333 INFO L82 PathProgramCache]: Analyzing trace with hash -455443918, now seen corresponding path program 588 times [2021-07-09 17:37:02,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:02,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692729273] [2021-07-09 17:37:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:02,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:02,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692729273] [2021-07-09 17:37:02,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692729273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:02,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909258927] [2021-07-09 17:37:02,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:02,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:37:02,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:02,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:37:02,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:02,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:02,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:02,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:02,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:02,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:02,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:37:02,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:02,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:02,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:02,763 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 17:37:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:02,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909258927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:02,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:02,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:37:02,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096583270] [2021-07-09 17:37:02,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:37:02,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:02,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:37:02,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:02,817 INFO L87 Difference]: Start difference. First operand 141 states and 285 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:03,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:03,335 INFO L93 Difference]: Finished difference Result 163 states and 327 transitions. [2021-07-09 17:37:03,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:37:03,336 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:03,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:03,336 INFO L225 Difference]: With dead ends: 163 [2021-07-09 17:37:03,336 INFO L226 Difference]: Without dead ends: 156 [2021-07-09 17:37:03,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 526.2ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:37:03,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-09 17:37:03,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 142. [2021-07-09 17:37:03,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.0425531914893615) internal successors, (288), 141 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 288 transitions. [2021-07-09 17:37:03,338 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 288 transitions. Word has length 20 [2021-07-09 17:37:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:03,338 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 288 transitions. [2021-07-09 17:37:03,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 288 transitions. [2021-07-09 17:37:03,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:03,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:03,338 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:03,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3122 [2021-07-09 17:37:03,539 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:03,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:03,539 INFO L82 PathProgramCache]: Analyzing trace with hash 680741354, now seen corresponding path program 589 times [2021-07-09 17:37:03,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:03,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860642570] [2021-07-09 17:37:03,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:03,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:03,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860642570] [2021-07-09 17:37:03,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860642570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:03,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530330778] [2021-07-09 17:37:03,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:03,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:03,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:03,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:03,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:03,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:03,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:03,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:03,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:03,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:04,055 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:37:04,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:04,059 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:04,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:04,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:04,086 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:04,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:04,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:04,110 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:04,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:04,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:04,131 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:37:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:04,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530330778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:04,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:04,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:37:04,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856498356] [2021-07-09 17:37:04,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:37:04,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:04,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:37:04,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:04,214 INFO L87 Difference]: Start difference. First operand 142 states and 288 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:04,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:04,838 INFO L93 Difference]: Finished difference Result 190 states and 366 transitions. [2021-07-09 17:37:04,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:37:04,838 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:04,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:04,839 INFO L225 Difference]: With dead ends: 190 [2021-07-09 17:37:04,839 INFO L226 Difference]: Without dead ends: 171 [2021-07-09 17:37:04,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 705.7ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:37:04,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-07-09 17:37:04,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 142. [2021-07-09 17:37:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.0425531914893615) internal successors, (288), 141 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:04,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 288 transitions. [2021-07-09 17:37:04,840 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 288 transitions. Word has length 20 [2021-07-09 17:37:04,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:04,840 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 288 transitions. [2021-07-09 17:37:04,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:04,840 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 288 transitions. [2021-07-09 17:37:04,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:04,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:04,841 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:05,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3125 [2021-07-09 17:37:05,041 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:05,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:05,041 INFO L82 PathProgramCache]: Analyzing trace with hash 401777130, now seen corresponding path program 590 times [2021-07-09 17:37:05,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:05,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838651492] [2021-07-09 17:37:05,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:05,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:05,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838651492] [2021-07-09 17:37:05,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838651492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:05,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964299247] [2021-07-09 17:37:05,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:05,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:05,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:05,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:05,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:05,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:05,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:05,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:05,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:05,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:05,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:05,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:05,387 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-07-09 17:37:05,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:05,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:05,390 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:05,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:05,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:05,397 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:37:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:05,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964299247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:05,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:05,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:37:05,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099650274] [2021-07-09 17:37:05,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:37:05,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:05,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:37:05,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:37:05,436 INFO L87 Difference]: Start difference. First operand 142 states and 288 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:05,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:05,893 INFO L93 Difference]: Finished difference Result 173 states and 345 transitions. [2021-07-09 17:37:05,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:37:05,893 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:05,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:05,893 INFO L225 Difference]: With dead ends: 173 [2021-07-09 17:37:05,893 INFO L226 Difference]: Without dead ends: 157 [2021-07-09 17:37:05,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 491.6ms TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:37:05,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-09 17:37:05,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 144. [2021-07-09 17:37:05,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.041958041958042) internal successors, (292), 143 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:05,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 292 transitions. [2021-07-09 17:37:05,895 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 292 transitions. Word has length 20 [2021-07-09 17:37:05,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:05,895 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 292 transitions. [2021-07-09 17:37:05,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:05,895 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 292 transitions. [2021-07-09 17:37:05,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:05,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:05,895 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:06,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3130 [2021-07-09 17:37:06,095 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:06,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:06,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1263782194, now seen corresponding path program 591 times [2021-07-09 17:37:06,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:06,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932031104] [2021-07-09 17:37:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:06,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:06,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932031104] [2021-07-09 17:37:06,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932031104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:06,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829252303] [2021-07-09 17:37:06,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:06,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:37:06,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:06,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:06,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:06,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:06,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:06,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:06,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:06,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:06,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,495 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-07-09 17:37:06,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:06,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:06,498 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:06,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:06,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,505 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:37:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:06,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829252303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:06,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:06,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:37:06,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280852605] [2021-07-09 17:37:06,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:37:06,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:06,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:37:06,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:37:06,541 INFO L87 Difference]: Start difference. First operand 144 states and 292 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:06,969 INFO L93 Difference]: Finished difference Result 164 states and 324 transitions. [2021-07-09 17:37:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:37:06,969 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:06,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:06,969 INFO L225 Difference]: With dead ends: 164 [2021-07-09 17:37:06,969 INFO L226 Difference]: Without dead ends: 151 [2021-07-09 17:37:06,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 487.7ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:37:06,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-09 17:37:06,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 145. [2021-07-09 17:37:06,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.0416666666666665) internal successors, (294), 144 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 294 transitions. [2021-07-09 17:37:06,971 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 294 transitions. Word has length 20 [2021-07-09 17:37:06,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:06,971 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 294 transitions. [2021-07-09 17:37:06,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,971 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 294 transitions. [2021-07-09 17:37:06,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:06,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:06,971 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:07,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3134,592 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:07,172 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:07,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:07,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1894999830, now seen corresponding path program 592 times [2021-07-09 17:37:07,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:07,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783203359] [2021-07-09 17:37:07,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:07,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:07,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783203359] [2021-07-09 17:37:07,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783203359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:07,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505375684] [2021-07-09 17:37:07,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:07,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:07,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:07,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:07,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:07,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:07,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:07,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:07,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:07,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:07,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:07,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:07,654 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:37:07,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:07,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:07,658 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:07,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:07,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:07,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:07,683 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:07,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:07,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:07,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:07,708 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:07,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:07,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:07,729 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:37:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:07,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505375684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:07,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:07,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:37:07,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959092131] [2021-07-09 17:37:07,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:37:07,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:07,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:37:07,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:07,807 INFO L87 Difference]: Start difference. First operand 145 states and 294 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:08,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:08,422 INFO L93 Difference]: Finished difference Result 167 states and 331 transitions. [2021-07-09 17:37:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:37:08,422 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:08,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:08,422 INFO L225 Difference]: With dead ends: 167 [2021-07-09 17:37:08,422 INFO L226 Difference]: Without dead ends: 155 [2021-07-09 17:37:08,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 654.9ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:37:08,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-07-09 17:37:08,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 146. [2021-07-09 17:37:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.0413793103448277) internal successors, (296), 145 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 296 transitions. [2021-07-09 17:37:08,424 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 296 transitions. Word has length 20 [2021-07-09 17:37:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:08,424 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 296 transitions. [2021-07-09 17:37:08,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:08,424 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 296 transitions. [2021-07-09 17:37:08,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:08,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:08,424 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:08,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3138,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:08,640 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:08,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:08,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1728800206, now seen corresponding path program 593 times [2021-07-09 17:37:08,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:08,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312840358] [2021-07-09 17:37:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:08,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:08,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312840358] [2021-07-09 17:37:08,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312840358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:08,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398701694] [2021-07-09 17:37:08,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:08,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:37:08,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:08,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:08,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:09,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:09,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:09,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:09,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:09,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:09,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:09,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:09,039 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-07-09 17:37:09,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:09,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:09,042 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:09,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:09,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:09,049 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:37:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:09,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398701694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:09,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:09,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:37:09,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620853329] [2021-07-09 17:37:09,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:37:09,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:09,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:37:09,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:09,090 INFO L87 Difference]: Start difference. First operand 146 states and 296 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:09,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:09,593 INFO L93 Difference]: Finished difference Result 173 states and 345 transitions. [2021-07-09 17:37:09,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:37:09,595 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:09,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:09,595 INFO L225 Difference]: With dead ends: 173 [2021-07-09 17:37:09,595 INFO L226 Difference]: Without dead ends: 160 [2021-07-09 17:37:09,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 509.3ms TimeCoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:37:09,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-07-09 17:37:09,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 153. [2021-07-09 17:37:09,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.039473684210526) internal successors, (310), 152 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:09,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 310 transitions. [2021-07-09 17:37:09,597 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 310 transitions. Word has length 20 [2021-07-09 17:37:09,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:09,597 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 310 transitions. [2021-07-09 17:37:09,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:09,597 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 310 transitions. [2021-07-09 17:37:09,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:09,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:09,597 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:09,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 594 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3143 [2021-07-09 17:37:09,801 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:09,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:09,801 INFO L82 PathProgramCache]: Analyzing trace with hash -592614934, now seen corresponding path program 594 times [2021-07-09 17:37:09,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:09,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418368525] [2021-07-09 17:37:09,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:10,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:10,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418368525] [2021-07-09 17:37:10,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418368525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:10,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762037511] [2021-07-09 17:37:10,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:10,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:37:10,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:10,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:10,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:10,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:10,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:10,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:10,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:10,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:10,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:10,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:10,263 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-07-09 17:37:10,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:10,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:10,267 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:10,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:10,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:10,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:10,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:10,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:10,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:10,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:10,318 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:10,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:10,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:10,339 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:37:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:10,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762037511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:10,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:10,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:37:10,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771026005] [2021-07-09 17:37:10,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:37:10,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:10,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:37:10,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:10,422 INFO L87 Difference]: Start difference. First operand 153 states and 310 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:11,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:11,036 INFO L93 Difference]: Finished difference Result 197 states and 382 transitions. [2021-07-09 17:37:11,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:37:11,037 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:11,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:11,037 INFO L225 Difference]: With dead ends: 197 [2021-07-09 17:37:11,037 INFO L226 Difference]: Without dead ends: 178 [2021-07-09 17:37:11,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 712.4ms TimeCoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:37:11,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-07-09 17:37:11,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 152. [2021-07-09 17:37:11,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.0397350993377485) internal successors, (308), 151 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:11,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 308 transitions. [2021-07-09 17:37:11,039 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 308 transitions. Word has length 20 [2021-07-09 17:37:11,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:11,039 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 308 transitions. [2021-07-09 17:37:11,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:11,039 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 308 transitions. [2021-07-09 17:37:11,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:11,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:11,039 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:11,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3146,595 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:11,239 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:11,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:11,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1556181602, now seen corresponding path program 595 times [2021-07-09 17:37:11,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:11,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721510728] [2021-07-09 17:37:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:11,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:11,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721510728] [2021-07-09 17:37:11,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721510728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:11,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658621371] [2021-07-09 17:37:11,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:11,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:11,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:11,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:11,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:11,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:11,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:11,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:11,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:11,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:11,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:11,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:11,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:11,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:11,590 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:11,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:11,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:11,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:11,647 INFO L628 ElimStorePlain]: treesize reduction 83, result has 43.5 percent of original size [2021-07-09 17:37:11,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:11,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:11,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:11,651 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:11,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:11,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:11,655 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:11,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:11,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:11,678 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:37:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:11,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658621371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:11,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:11,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:37:11,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484463181] [2021-07-09 17:37:11,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:37:11,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:11,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:37:11,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:11,757 INFO L87 Difference]: Start difference. First operand 152 states and 308 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:12,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:12,594 INFO L93 Difference]: Finished difference Result 219 states and 423 transitions. [2021-07-09 17:37:12,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:37:12,595 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:12,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:12,595 INFO L225 Difference]: With dead ends: 219 [2021-07-09 17:37:12,595 INFO L226 Difference]: Without dead ends: 193 [2021-07-09 17:37:12,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 881.5ms TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:37:12,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-07-09 17:37:12,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 155. [2021-07-09 17:37:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.0584415584415585) internal successors, (317), 154 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:12,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 317 transitions. [2021-07-09 17:37:12,597 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 317 transitions. Word has length 20 [2021-07-09 17:37:12,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:12,597 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 317 transitions. [2021-07-09 17:37:12,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:12,597 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 317 transitions. [2021-07-09 17:37:12,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:12,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:12,597 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:12,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 596 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3151 [2021-07-09 17:37:12,798 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:12,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:12,798 INFO L82 PathProgramCache]: Analyzing trace with hash -550602518, now seen corresponding path program 596 times [2021-07-09 17:37:12,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:12,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440419215] [2021-07-09 17:37:12,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:13,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:13,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440419215] [2021-07-09 17:37:13,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440419215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:13,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939386178] [2021-07-09 17:37:13,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:13,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:13,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:13,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:13,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:13,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:13,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:13,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:13,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:13,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:13,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:13,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:13,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:13,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:13,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:13,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:13,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:13,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:13,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:13,173 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:13,224 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-07-09 17:37:13,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:13,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:13,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:13,228 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:13,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:13,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:13,231 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:13,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:13,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:13,254 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:37:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:13,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939386178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:13,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:13,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:37:13,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615331220] [2021-07-09 17:37:13,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:37:13,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:13,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:37:13,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:13,335 INFO L87 Difference]: Start difference. First operand 155 states and 317 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:14,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:14,275 INFO L93 Difference]: Finished difference Result 212 states and 420 transitions. [2021-07-09 17:37:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:37:14,275 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:14,275 INFO L225 Difference]: With dead ends: 212 [2021-07-09 17:37:14,275 INFO L226 Difference]: Without dead ends: 193 [2021-07-09 17:37:14,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 929.8ms TimeCoverageRelationStatistics Valid=157, Invalid=1403, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:37:14,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-07-09 17:37:14,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 156. [2021-07-09 17:37:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.064516129032258) internal successors, (320), 155 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:14,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 320 transitions. [2021-07-09 17:37:14,277 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 320 transitions. Word has length 20 [2021-07-09 17:37:14,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:14,277 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 320 transitions. [2021-07-09 17:37:14,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:14,277 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 320 transitions. [2021-07-09 17:37:14,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:14,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:14,278 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:14,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3154 [2021-07-09 17:37:14,478 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:14,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:14,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1069380134, now seen corresponding path program 597 times [2021-07-09 17:37:14,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:14,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090266877] [2021-07-09 17:37:14,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:14,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:14,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090266877] [2021-07-09 17:37:14,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090266877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:14,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81730559] [2021-07-09 17:37:14,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:14,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:14,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:14,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:37:14,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:14,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:14,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:14,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:37:14,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:14,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,857 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 17:37:14,893 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:14,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81730559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:14,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:14,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:37:14,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945051378] [2021-07-09 17:37:14,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:37:14,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:14,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:37:14,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:14,894 INFO L87 Difference]: Start difference. First operand 156 states and 320 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:15,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:15,268 INFO L93 Difference]: Finished difference Result 191 states and 388 transitions. [2021-07-09 17:37:15,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:37:15,268 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:15,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:15,268 INFO L225 Difference]: With dead ends: 191 [2021-07-09 17:37:15,268 INFO L226 Difference]: Without dead ends: 184 [2021-07-09 17:37:15,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 395.3ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:37:15,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-07-09 17:37:15,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 157. [2021-07-09 17:37:15,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.0705128205128207) internal successors, (323), 156 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:15,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 323 transitions. [2021-07-09 17:37:15,270 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 323 transitions. Word has length 20 [2021-07-09 17:37:15,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:15,270 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 323 transitions. [2021-07-09 17:37:15,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:15,270 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 323 transitions. [2021-07-09 17:37:15,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:15,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:15,270 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:15,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3157,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:15,471 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:15,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:15,471 INFO L82 PathProgramCache]: Analyzing trace with hash 527558510, now seen corresponding path program 598 times [2021-07-09 17:37:15,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:15,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253938702] [2021-07-09 17:37:15,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:15,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:15,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:15,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253938702] [2021-07-09 17:37:15,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253938702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:15,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369015242] [2021-07-09 17:37:15,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:15,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:15,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:15,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:15,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:15,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:15,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:15,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:15,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:15,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:15,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:15,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:15,868 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-07-09 17:37:15,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:15,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:15,870 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:15,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:15,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:15,877 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:37:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:15,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369015242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:15,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:15,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:37:15,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558585548] [2021-07-09 17:37:15,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:37:15,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:15,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:37:15,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:15,915 INFO L87 Difference]: Start difference. First operand 157 states and 323 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:16,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:16,305 INFO L93 Difference]: Finished difference Result 203 states and 405 transitions. [2021-07-09 17:37:16,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:37:16,305 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:16,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:16,306 INFO L225 Difference]: With dead ends: 203 [2021-07-09 17:37:16,306 INFO L226 Difference]: Without dead ends: 184 [2021-07-09 17:37:16,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 399.9ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:37:16,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-07-09 17:37:16,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 158. [2021-07-09 17:37:16,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.070063694267516) internal successors, (325), 157 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:16,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 325 transitions. [2021-07-09 17:37:16,307 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 325 transitions. Word has length 20 [2021-07-09 17:37:16,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:16,308 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 325 transitions. [2021-07-09 17:37:16,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:16,308 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 325 transitions. [2021-07-09 17:37:16,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:16,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:16,308 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:16,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3161 [2021-07-09 17:37:16,508 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:16,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:16,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1479911718, now seen corresponding path program 599 times [2021-07-09 17:37:16,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:16,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445153733] [2021-07-09 17:37:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:16,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:16,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445153733] [2021-07-09 17:37:16,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445153733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:16,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803408402] [2021-07-09 17:37:16,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:16,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:16,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:16,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:16,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:17,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:17,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:17,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:17,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:17,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:17,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,082 INFO L628 ElimStorePlain]: treesize reduction 40, result has 43.7 percent of original size [2021-07-09 17:37:17,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:17,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:37:17,085 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:17,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,092 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:37:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:17,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803408402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:17,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:17,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:37:17,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438207245] [2021-07-09 17:37:17,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:37:17,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:17,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:37:17,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:17,135 INFO L87 Difference]: Start difference. First operand 158 states and 325 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:17,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:17,481 INFO L93 Difference]: Finished difference Result 186 states and 369 transitions. [2021-07-09 17:37:17,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:37:17,481 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:17,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:17,481 INFO L225 Difference]: With dead ends: 186 [2021-07-09 17:37:17,481 INFO L226 Difference]: Without dead ends: 170 [2021-07-09 17:37:17,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 570.7ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:37:17,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-07-09 17:37:17,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 159. [2021-07-09 17:37:17,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.069620253164557) internal successors, (327), 158 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:17,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 327 transitions. [2021-07-09 17:37:17,483 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 327 transitions. Word has length 20 [2021-07-09 17:37:17,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:17,483 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 327 transitions. [2021-07-09 17:37:17,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:17,483 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 327 transitions. [2021-07-09 17:37:17,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:17,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:17,483 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:17,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3164 [2021-07-09 17:37:17,684 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:17,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:17,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1953050514, now seen corresponding path program 600 times [2021-07-09 17:37:17,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:17,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041367635] [2021-07-09 17:37:17,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:17,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:17,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041367635] [2021-07-09 17:37:17,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041367635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:17,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228968216] [2021-07-09 17:37:17,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:17,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:37:17,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:17,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:37:17,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:18,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:18,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:18,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:18,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:18,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:18,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:18,164 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:18,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:18,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:18,170 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 17:37:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:18,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228968216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:18,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:18,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:37:18,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633068647] [2021-07-09 17:37:18,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:37:18,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:18,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:37:18,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:37:18,190 INFO L87 Difference]: Start difference. First operand 159 states and 327 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:18,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:18,531 INFO L93 Difference]: Finished difference Result 189 states and 378 transitions. [2021-07-09 17:37:18,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:37:18,531 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:18,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:18,531 INFO L225 Difference]: With dead ends: 189 [2021-07-09 17:37:18,531 INFO L226 Difference]: Without dead ends: 182 [2021-07-09 17:37:18,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 464.1ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:18,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-07-09 17:37:18,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 160. [2021-07-09 17:37:18,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.0754716981132075) internal successors, (330), 159 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:18,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 330 transitions. [2021-07-09 17:37:18,533 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 330 transitions. Word has length 20 [2021-07-09 17:37:18,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:18,533 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 330 transitions. [2021-07-09 17:37:18,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:18,533 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 330 transitions. [2021-07-09 17:37:18,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:18,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:18,533 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:18,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3168,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:18,734 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:18,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:18,734 INFO L82 PathProgramCache]: Analyzing trace with hash -816865242, now seen corresponding path program 601 times [2021-07-09 17:37:18,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:18,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169889512] [2021-07-09 17:37:18,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:18,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:18,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169889512] [2021-07-09 17:37:18,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169889512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:18,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739444334] [2021-07-09 17:37:18,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:37:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:19,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:19,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:19,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:19,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:19,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,343 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:37:19,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:19,346 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:19,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:19,371 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:19,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:19,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:19,395 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:19,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:19,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:19,416 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:37:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:19,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739444334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:19,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:19,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:37:19,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018676834] [2021-07-09 17:37:19,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:37:19,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:19,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:37:19,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:19,507 INFO L87 Difference]: Start difference. First operand 160 states and 330 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:20,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:20,041 INFO L93 Difference]: Finished difference Result 216 states and 421 transitions. [2021-07-09 17:37:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:37:20,042 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:20,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:20,042 INFO L225 Difference]: With dead ends: 216 [2021-07-09 17:37:20,042 INFO L226 Difference]: Without dead ends: 197 [2021-07-09 17:37:20,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 728.7ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:37:20,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-09 17:37:20,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2021-07-09 17:37:20,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.0705128205128207) internal successors, (323), 156 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:20,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 323 transitions. [2021-07-09 17:37:20,044 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 323 transitions. Word has length 20 [2021-07-09 17:37:20,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:20,044 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 323 transitions. [2021-07-09 17:37:20,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:20,044 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 323 transitions. [2021-07-09 17:37:20,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:20,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:20,044 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:20,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3171,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:20,244 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:20,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:20,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1162384394, now seen corresponding path program 602 times [2021-07-09 17:37:20,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:20,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509307889] [2021-07-09 17:37:20,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:20,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:20,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509307889] [2021-07-09 17:37:20,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509307889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:20,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000136683] [2021-07-09 17:37:20,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:20,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:20,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:20,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:20,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:20,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:20,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:20,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:20,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:20,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:20,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:20,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:20,695 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-07-09 17:37:20,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:20,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:20,698 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:20,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:20,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:20,705 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:37:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:20,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000136683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:20,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:20,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:37:20,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936206743] [2021-07-09 17:37:20,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:37:20,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:20,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:37:20,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:20,747 INFO L87 Difference]: Start difference. First operand 157 states and 323 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:20,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:20,979 INFO L93 Difference]: Finished difference Result 179 states and 357 transitions. [2021-07-09 17:37:20,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:20,979 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:20,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:20,979 INFO L225 Difference]: With dead ends: 179 [2021-07-09 17:37:20,979 INFO L226 Difference]: Without dead ends: 160 [2021-07-09 17:37:20,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 422.5ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:37:20,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-07-09 17:37:20,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2021-07-09 17:37:20,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.070063694267516) internal successors, (325), 157 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:20,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 325 transitions. [2021-07-09 17:37:20,981 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 325 transitions. Word has length 20 [2021-07-09 17:37:20,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:20,981 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 325 transitions. [2021-07-09 17:37:20,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:20,981 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 325 transitions. [2021-07-09 17:37:20,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:20,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:20,981 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:21,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3176 [2021-07-09 17:37:21,182 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:21,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:21,182 INFO L82 PathProgramCache]: Analyzing trace with hash -210031186, now seen corresponding path program 603 times [2021-07-09 17:37:21,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:21,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902285216] [2021-07-09 17:37:21,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:21,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:21,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902285216] [2021-07-09 17:37:21,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902285216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:21,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829013030] [2021-07-09 17:37:21,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:21,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:21,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:21,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:21,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:21,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:21,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:21,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:21,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:21,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:21,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:21,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:21,702 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-07-09 17:37:21,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:21,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:21,705 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:21,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:21,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:21,712 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:37:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:21,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829013030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:21,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:21,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:37:21,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164995813] [2021-07-09 17:37:21,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:37:21,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:21,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:37:21,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:21,753 INFO L87 Difference]: Start difference. First operand 158 states and 325 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:22,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:22,073 INFO L93 Difference]: Finished difference Result 177 states and 354 transitions. [2021-07-09 17:37:22,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:22,073 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:22,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:22,073 INFO L225 Difference]: With dead ends: 177 [2021-07-09 17:37:22,073 INFO L226 Difference]: Without dead ends: 161 [2021-07-09 17:37:22,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 553.4ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:37:22,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-09 17:37:22,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-07-09 17:37:22,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.069620253164557) internal successors, (327), 158 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:22,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 327 transitions. [2021-07-09 17:37:22,075 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 327 transitions. Word has length 20 [2021-07-09 17:37:22,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:22,075 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 327 transitions. [2021-07-09 17:37:22,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:22,075 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 327 transitions. [2021-07-09 17:37:22,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:22,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:22,075 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:22,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3180,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:22,275 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:22,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:22,276 INFO L82 PathProgramCache]: Analyzing trace with hash 651973878, now seen corresponding path program 604 times [2021-07-09 17:37:22,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:22,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566064942] [2021-07-09 17:37:22,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:22,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:22,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566064942] [2021-07-09 17:37:22,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566064942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:22,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886559116] [2021-07-09 17:37:22,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:22,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:22,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:22,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:22,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:22,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:22,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:22,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,752 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-07-09 17:37:22,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:22,755 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:22,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:22,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,762 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:37:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:22,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886559116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:22,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:22,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:37:22,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270858685] [2021-07-09 17:37:22,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:37:22,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:22,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:37:22,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:22,803 INFO L87 Difference]: Start difference. First operand 159 states and 327 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:23,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:23,197 INFO L93 Difference]: Finished difference Result 180 states and 364 transitions. [2021-07-09 17:37:23,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:37:23,197 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:23,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:23,197 INFO L225 Difference]: With dead ends: 180 [2021-07-09 17:37:23,197 INFO L226 Difference]: Without dead ends: 167 [2021-07-09 17:37:23,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 520.4ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:37:23,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-09 17:37:23,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2021-07-09 17:37:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.069182389937107) internal successors, (329), 159 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:23,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 329 transitions. [2021-07-09 17:37:23,199 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 329 transitions. Word has length 20 [2021-07-09 17:37:23,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:23,199 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 329 transitions. [2021-07-09 17:37:23,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:23,199 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 329 transitions. [2021-07-09 17:37:23,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:23,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:23,199 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:23,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3184 [2021-07-09 17:37:23,400 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:23,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:23,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1788159150, now seen corresponding path program 605 times [2021-07-09 17:37:23,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:23,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145529626] [2021-07-09 17:37:23,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:23,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:23,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145529626] [2021-07-09 17:37:23,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145529626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:23,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47304316] [2021-07-09 17:37:23,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:23,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:23,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:23,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:23,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:23,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:23,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:23,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:23,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:23,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:23,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:23,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:23,876 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:37:23,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:23,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:23,880 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:23,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:23,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:23,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:23,905 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:23,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:23,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:23,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:23,929 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:23,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:23,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:23,949 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:37:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:24,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47304316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:24,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:24,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:37:24,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314367127] [2021-07-09 17:37:24,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:37:24,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:24,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:37:24,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:24,034 INFO L87 Difference]: Start difference. First operand 160 states and 329 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:24,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:24,404 INFO L93 Difference]: Finished difference Result 201 states and 395 transitions. [2021-07-09 17:37:24,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:37:24,405 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:24,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:24,405 INFO L225 Difference]: With dead ends: 201 [2021-07-09 17:37:24,405 INFO L226 Difference]: Without dead ends: 182 [2021-07-09 17:37:24,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 517.8ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:37:24,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-07-09 17:37:24,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 156. [2021-07-09 17:37:24,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.0709677419354837) internal successors, (321), 155 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 321 transitions. [2021-07-09 17:37:24,406 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 321 transitions. Word has length 20 [2021-07-09 17:37:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:24,407 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 321 transitions. [2021-07-09 17:37:24,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 321 transitions. [2021-07-09 17:37:24,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:24,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:24,407 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:24,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 606 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3188 [2021-07-09 17:37:24,607 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:24,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1746467574, now seen corresponding path program 606 times [2021-07-09 17:37:24,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:24,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90019702] [2021-07-09 17:37:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:24,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:24,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90019702] [2021-07-09 17:37:24,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90019702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:24,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514506020] [2021-07-09 17:37:24,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:24,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:37:24,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:24,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:37:24,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:25,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:25,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:25,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:25,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:25,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:25,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:25,030 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:25,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:25,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:25,036 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-07-09 17:37:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:25,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514506020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:25,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:25,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:37:25,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622853405] [2021-07-09 17:37:25,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:37:25,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:25,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:37:25,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:25,073 INFO L87 Difference]: Start difference. First operand 156 states and 321 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:25,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:25,360 INFO L93 Difference]: Finished difference Result 180 states and 362 transitions. [2021-07-09 17:37:25,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:37:25,360 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:25,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:25,361 INFO L225 Difference]: With dead ends: 180 [2021-07-09 17:37:25,361 INFO L226 Difference]: Without dead ends: 173 [2021-07-09 17:37:25,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 389.1ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:25,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-07-09 17:37:25,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 159. [2021-07-09 17:37:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.0759493670886076) internal successors, (328), 158 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:25,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 328 transitions. [2021-07-09 17:37:25,362 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 328 transitions. Word has length 20 [2021-07-09 17:37:25,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:25,362 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 328 transitions. [2021-07-09 17:37:25,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:25,362 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 328 transitions. [2021-07-09 17:37:25,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:25,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:25,363 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:25,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3193 [2021-07-09 17:37:25,563 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:25,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:25,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1596146514, now seen corresponding path program 607 times [2021-07-09 17:37:25,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:25,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224103165] [2021-07-09 17:37:25,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:25,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:25,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224103165] [2021-07-09 17:37:25,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224103165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:25,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533415987] [2021-07-09 17:37:25,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:25,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:25,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:26,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:26,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:26,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:26,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:26,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:26,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:26,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:26,054 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-07-09 17:37:26,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:26,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:26,057 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:26,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:26,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:26,064 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:37:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:26,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533415987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:26,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:26,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:37:26,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251531679] [2021-07-09 17:37:26,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:37:26,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:26,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:37:26,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:26,108 INFO L87 Difference]: Start difference. First operand 159 states and 328 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:26,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:26,492 INFO L93 Difference]: Finished difference Result 186 states and 371 transitions. [2021-07-09 17:37:26,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:37:26,492 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:26,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:26,493 INFO L225 Difference]: With dead ends: 186 [2021-07-09 17:37:26,493 INFO L226 Difference]: Without dead ends: 170 [2021-07-09 17:37:26,493 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 509.7ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:37:26,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-07-09 17:37:26,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2021-07-09 17:37:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.0754716981132075) internal successors, (330), 159 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:26,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 330 transitions. [2021-07-09 17:37:26,494 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 330 transitions. Word has length 20 [2021-07-09 17:37:26,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:26,494 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 330 transitions. [2021-07-09 17:37:26,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:26,494 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 330 transitions. [2021-07-09 17:37:26,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:26,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:26,495 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:26,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3196 [2021-07-09 17:37:26,695 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:26,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:26,695 INFO L82 PathProgramCache]: Analyzing trace with hash -734141450, now seen corresponding path program 608 times [2021-07-09 17:37:26,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:26,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438962038] [2021-07-09 17:37:26,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:26,880 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:26,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:26,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438962038] [2021-07-09 17:37:26,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438962038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:26,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098274687] [2021-07-09 17:37:26,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:26,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:26,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:26,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:26,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:27,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:27,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:27,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:27,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:27,166 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-07-09 17:37:27,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:27,169 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:27,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:27,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:27,176 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:37:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:27,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098274687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:27,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:27,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:37:27,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895582286] [2021-07-09 17:37:27,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:37:27,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:27,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:37:27,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:27,221 INFO L87 Difference]: Start difference. First operand 160 states and 330 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:27,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:27,765 INFO L93 Difference]: Finished difference Result 196 states and 393 transitions. [2021-07-09 17:37:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:37:27,765 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:27,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:27,766 INFO L225 Difference]: With dead ends: 196 [2021-07-09 17:37:27,766 INFO L226 Difference]: Without dead ends: 183 [2021-07-09 17:37:27,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 574.0ms TimeCoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:37:27,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-09 17:37:27,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 161. [2021-07-09 17:37:27,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.075) internal successors, (332), 160 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:27,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 332 transitions. [2021-07-09 17:37:27,767 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 332 transitions. Word has length 20 [2021-07-09 17:37:27,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:27,767 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 332 transitions. [2021-07-09 17:37:27,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:27,767 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 332 transitions. [2021-07-09 17:37:27,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:27,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:27,768 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:27,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3199 [2021-07-09 17:37:27,968 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:27,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:27,968 INFO L82 PathProgramCache]: Analyzing trace with hash 402043822, now seen corresponding path program 609 times [2021-07-09 17:37:27,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:27,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263850929] [2021-07-09 17:37:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:28,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:28,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263850929] [2021-07-09 17:37:28,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263850929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:28,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880940839] [2021-07-09 17:37:28,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:28,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:37:28,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:28,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:28,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:28,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:28,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:28,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:28,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:28,438 INFO L628 ElimStorePlain]: treesize reduction 95, result has 40.6 percent of original size [2021-07-09 17:37:28,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:28,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:28,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:28,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:28,465 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:28,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:28,485 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:37:28,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:28,486 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:173, output treesize:36 [2021-07-09 17:37:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:28,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880940839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:28,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:28,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:37:28,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746073355] [2021-07-09 17:37:28,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:37:28,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:28,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:37:28,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:28,563 INFO L87 Difference]: Start difference. First operand 161 states and 332 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:29,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:29,028 INFO L93 Difference]: Finished difference Result 196 states and 391 transitions. [2021-07-09 17:37:29,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:37:29,028 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:29,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:29,029 INFO L225 Difference]: With dead ends: 196 [2021-07-09 17:37:29,029 INFO L226 Difference]: Without dead ends: 184 [2021-07-09 17:37:29,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:37:29,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-07-09 17:37:29,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 159. [2021-07-09 17:37:29,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.0759493670886076) internal successors, (328), 158 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:29,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 328 transitions. [2021-07-09 17:37:29,030 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 328 transitions. Word has length 20 [2021-07-09 17:37:29,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:29,030 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 328 transitions. [2021-07-09 17:37:29,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:29,030 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 328 transitions. [2021-07-09 17:37:29,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:29,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:29,031 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:29,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3203,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:29,231 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:29,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:29,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1813022502, now seen corresponding path program 610 times [2021-07-09 17:37:29,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:29,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164760173] [2021-07-09 17:37:29,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:29,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:29,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164760173] [2021-07-09 17:37:29,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164760173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:29,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437361188] [2021-07-09 17:37:29,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:29,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:29,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:29,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:29,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:29,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:29,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:29,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:29,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:29,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:29,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:29,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:29,648 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-07-09 17:37:29,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:29,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:29,651 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:29,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:29,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:29,658 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:37:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:29,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437361188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:29,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:29,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:37:29,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104039041] [2021-07-09 17:37:29,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:37:29,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:29,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:37:29,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:29,696 INFO L87 Difference]: Start difference. First operand 159 states and 328 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:29,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:29,992 INFO L93 Difference]: Finished difference Result 182 states and 365 transitions. [2021-07-09 17:37:29,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:37:29,992 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:29,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:29,992 INFO L225 Difference]: With dead ends: 182 [2021-07-09 17:37:29,992 INFO L226 Difference]: Without dead ends: 166 [2021-07-09 17:37:29,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 445.1ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:37:29,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-09 17:37:29,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2021-07-09 17:37:29,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.075) internal successors, (332), 160 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:29,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 332 transitions. [2021-07-09 17:37:29,994 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 332 transitions. Word has length 20 [2021-07-09 17:37:29,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:29,994 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 332 transitions. [2021-07-09 17:37:29,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:29,994 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 332 transitions. [2021-07-09 17:37:29,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:29,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:29,994 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:30,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 611 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3208 [2021-07-09 17:37:30,195 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:30,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:30,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1619939730, now seen corresponding path program 611 times [2021-07-09 17:37:30,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:30,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699118370] [2021-07-09 17:37:30,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:30,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:30,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699118370] [2021-07-09 17:37:30,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699118370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:30,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751484401] [2021-07-09 17:37:30,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:30,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:37:30,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:30,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:30,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:30,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:30,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:30,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,634 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-07-09 17:37:30,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:30,637 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:30,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:30,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,644 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:37:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:30,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751484401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:30,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:30,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:37:30,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103282563] [2021-07-09 17:37:30,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:37:30,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:30,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:37:30,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:30,681 INFO L87 Difference]: Start difference. First operand 161 states and 332 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:31,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:31,153 INFO L93 Difference]: Finished difference Result 185 states and 375 transitions. [2021-07-09 17:37:31,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:37:31,153 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:31,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:31,153 INFO L225 Difference]: With dead ends: 185 [2021-07-09 17:37:31,153 INFO L226 Difference]: Without dead ends: 172 [2021-07-09 17:37:31,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 596.2ms TimeCoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:37:31,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-09 17:37:31,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 162. [2021-07-09 17:37:31,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.0745341614906834) internal successors, (334), 161 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 334 transitions. [2021-07-09 17:37:31,155 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 334 transitions. Word has length 20 [2021-07-09 17:37:31,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:31,155 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 334 transitions. [2021-07-09 17:37:31,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:31,155 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 334 transitions. [2021-07-09 17:37:31,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:31,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:31,155 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:31,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3212 [2021-07-09 17:37:31,355 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:31,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:31,356 INFO L82 PathProgramCache]: Analyzing trace with hash -483754458, now seen corresponding path program 612 times [2021-07-09 17:37:31,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:31,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891766641] [2021-07-09 17:37:31,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:31,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:31,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891766641] [2021-07-09 17:37:31,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891766641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:31,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434066534] [2021-07-09 17:37:31,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:31,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:37:31,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:31,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:37:31,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:31,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:31,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:31,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:31,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:31,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:31,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:31,816 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:31,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:31,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:31,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:31,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:31,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:31,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:31,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:31,862 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:31,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:31,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:31,880 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:37:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:31,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434066534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:31,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:31,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:37:31,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731384185] [2021-07-09 17:37:31,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:37:31,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:31,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:37:31,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:31,957 INFO L87 Difference]: Start difference. First operand 162 states and 334 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:32,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:32,467 INFO L93 Difference]: Finished difference Result 185 states and 378 transitions. [2021-07-09 17:37:32,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:37:32,467 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:32,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:32,467 INFO L225 Difference]: With dead ends: 185 [2021-07-09 17:37:32,467 INFO L226 Difference]: Without dead ends: 178 [2021-07-09 17:37:32,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 668.5ms TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:37:32,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-07-09 17:37:32,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 161. [2021-07-09 17:37:32,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.075) internal successors, (332), 160 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:32,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 332 transitions. [2021-07-09 17:37:32,469 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 332 transitions. Word has length 20 [2021-07-09 17:37:32,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:32,469 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 332 transitions. [2021-07-09 17:37:32,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:32,469 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 332 transitions. [2021-07-09 17:37:32,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:32,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:32,469 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:32,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3215,613 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:32,685 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:32,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:32,685 INFO L82 PathProgramCache]: Analyzing trace with hash -725542874, now seen corresponding path program 613 times [2021-07-09 17:37:32,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:32,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392710414] [2021-07-09 17:37:32,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:32,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:32,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392710414] [2021-07-09 17:37:32,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392710414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:32,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245689818] [2021-07-09 17:37:32,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:32,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:32,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:33,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:33,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:33,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:33,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:33,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:33,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:33,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:33,105 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-07-09 17:37:33,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:33,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:33,108 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:33,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:33,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:33,115 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:37:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:33,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245689818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:33,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:33,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:37:33,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819878373] [2021-07-09 17:37:33,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:37:33,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:33,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:37:33,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:33,156 INFO L87 Difference]: Start difference. First operand 161 states and 332 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:33,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:33,434 INFO L93 Difference]: Finished difference Result 183 states and 367 transitions. [2021-07-09 17:37:33,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:37:33,434 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:33,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:33,434 INFO L225 Difference]: With dead ends: 183 [2021-07-09 17:37:33,434 INFO L226 Difference]: Without dead ends: 167 [2021-07-09 17:37:33,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 398.8ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:37:33,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-09 17:37:33,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2021-07-09 17:37:33,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.0736196319018405) internal successors, (338), 163 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:33,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 338 transitions. [2021-07-09 17:37:33,436 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 338 transitions. Word has length 20 [2021-07-09 17:37:33,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:33,436 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 338 transitions. [2021-07-09 17:37:33,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:33,436 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 338 transitions. [2021-07-09 17:37:33,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:33,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:33,436 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:33,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3220,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:33,637 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:33,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:33,637 INFO L82 PathProgramCache]: Analyzing trace with hash 136462190, now seen corresponding path program 614 times [2021-07-09 17:37:33,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:33,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316190624] [2021-07-09 17:37:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:33,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:33,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:33,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316190624] [2021-07-09 17:37:33,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316190624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:33,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985331726] [2021-07-09 17:37:33,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:33,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:33,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:33,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:33,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:34,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:34,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:34,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:34,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:34,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:34,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:34,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:34,067 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-07-09 17:37:34,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:34,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:34,070 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:34,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:34,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:34,078 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:37:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:34,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985331726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:34,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:34,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:37:34,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526115165] [2021-07-09 17:37:34,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:37:34,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:34,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:37:34,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:34,123 INFO L87 Difference]: Start difference. First operand 164 states and 338 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:34,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:34,595 INFO L93 Difference]: Finished difference Result 186 states and 377 transitions. [2021-07-09 17:37:34,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:37:34,596 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:34,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:34,596 INFO L225 Difference]: With dead ends: 186 [2021-07-09 17:37:34,596 INFO L226 Difference]: Without dead ends: 173 [2021-07-09 17:37:34,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 544.9ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:37:34,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-07-09 17:37:34,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 165. [2021-07-09 17:37:34,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.073170731707317) internal successors, (340), 164 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:34,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 340 transitions. [2021-07-09 17:37:34,597 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 340 transitions. Word has length 20 [2021-07-09 17:37:34,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:34,597 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 340 transitions. [2021-07-09 17:37:34,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:34,598 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 340 transitions. [2021-07-09 17:37:34,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:34,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:34,598 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:34,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3224,615 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:34,798 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:34,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:34,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1272647462, now seen corresponding path program 615 times [2021-07-09 17:37:34,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:34,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658038844] [2021-07-09 17:37:34,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:35,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:35,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658038844] [2021-07-09 17:37:35,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658038844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:35,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519672819] [2021-07-09 17:37:35,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:35,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:37:35,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:35,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:35,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:35,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:35,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:35,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,289 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:37:35,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:35,292 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:35,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:35,316 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:35,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:35,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:35,341 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:35,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:35,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:35,361 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:37:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:35,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519672819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:35,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:35,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:37:35,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548622973] [2021-07-09 17:37:35,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:37:35,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:35,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:37:35,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:35,447 INFO L87 Difference]: Start difference. First operand 165 states and 340 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:35,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:35,986 INFO L93 Difference]: Finished difference Result 209 states and 412 transitions. [2021-07-09 17:37:35,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:37:35,987 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:35,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:35,987 INFO L225 Difference]: With dead ends: 209 [2021-07-09 17:37:35,987 INFO L226 Difference]: Without dead ends: 190 [2021-07-09 17:37:35,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 681.6ms TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:37:35,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-07-09 17:37:35,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 163. [2021-07-09 17:37:35,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.074074074074074) internal successors, (336), 162 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:35,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 336 transitions. [2021-07-09 17:37:35,989 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 336 transitions. Word has length 20 [2021-07-09 17:37:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:35,989 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 336 transitions. [2021-07-09 17:37:35,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:35,989 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 336 transitions. [2021-07-09 17:37:35,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:35,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:35,989 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:36,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3228,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:36,190 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:36,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:36,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1970321930, now seen corresponding path program 616 times [2021-07-09 17:37:36,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:36,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369174915] [2021-07-09 17:37:36,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:36,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:36,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369174915] [2021-07-09 17:37:36,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369174915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:36,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831522924] [2021-07-09 17:37:36,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:36,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:36,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:36,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:36,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:36,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:36,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:36,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:36,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:36,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:36,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:36,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:36,556 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-07-09 17:37:36,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:36,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:36,559 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:36,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:36,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:36,566 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:37:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:36,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831522924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:36,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:36,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:37:36,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13226634] [2021-07-09 17:37:36,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:37:36,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:36,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:37:36,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:36,606 INFO L87 Difference]: Start difference. First operand 163 states and 336 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:36,992 INFO L93 Difference]: Finished difference Result 186 states and 377 transitions. [2021-07-09 17:37:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:37:36,992 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:36,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:36,992 INFO L225 Difference]: With dead ends: 186 [2021-07-09 17:37:36,992 INFO L226 Difference]: Without dead ends: 173 [2021-07-09 17:37:36,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 473.2ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:37:36,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-07-09 17:37:36,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 165. [2021-07-09 17:37:36,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.073170731707317) internal successors, (340), 164 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:36,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 340 transitions. [2021-07-09 17:37:36,994 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 340 transitions. Word has length 20 [2021-07-09 17:37:36,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:36,994 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 340 transitions. [2021-07-09 17:37:36,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:36,994 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 340 transitions. [2021-07-09 17:37:36,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:36,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:36,994 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:37,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3233,617 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:37,195 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:37,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:37,195 INFO L82 PathProgramCache]: Analyzing trace with hash -834136658, now seen corresponding path program 617 times [2021-07-09 17:37:37,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:37,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341142543] [2021-07-09 17:37:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:37,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:37,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341142543] [2021-07-09 17:37:37,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341142543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:37,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095800273] [2021-07-09 17:37:37,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:37,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:37:37,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:37,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:37,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:37,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:37,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:37,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,646 INFO L628 ElimStorePlain]: treesize reduction 91, result has 43.1 percent of original size [2021-07-09 17:37:37,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:37:37,649 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:37,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:37,673 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:37,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:37,694 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:37:37,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:37,695 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:173, output treesize:36 [2021-07-09 17:37:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:37,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095800273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:37,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:37,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:37:37,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551711459] [2021-07-09 17:37:37,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:37:37,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:37,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:37:37,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:37,772 INFO L87 Difference]: Start difference. First operand 165 states and 340 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:38,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:38,346 INFO L93 Difference]: Finished difference Result 208 states and 410 transitions. [2021-07-09 17:37:38,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:37:38,347 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:38,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:38,347 INFO L225 Difference]: With dead ends: 208 [2021-07-09 17:37:38,347 INFO L226 Difference]: Without dead ends: 189 [2021-07-09 17:37:38,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 676.5ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:37:38,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-07-09 17:37:38,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 164. [2021-07-09 17:37:38,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.0736196319018405) internal successors, (338), 163 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:38,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 338 transitions. [2021-07-09 17:37:38,349 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 338 transitions. Word has length 20 [2021-07-09 17:37:38,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:38,349 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 338 transitions. [2021-07-09 17:37:38,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:38,349 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 338 transitions. [2021-07-09 17:37:38,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:38,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:38,349 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:38,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3236,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:38,550 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:38,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:38,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1314659878, now seen corresponding path program 618 times [2021-07-09 17:37:38,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:38,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772766709] [2021-07-09 17:37:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:38,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:38,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772766709] [2021-07-09 17:37:38,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772766709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:38,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334438850] [2021-07-09 17:37:38,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:38,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:37:38,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:38,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:38,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:38,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:38,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:38,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:38,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:38,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:38,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:38,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:38,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:38,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:38,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:38,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:38,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:38,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:38,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:38,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:38,919 INFO L628 ElimStorePlain]: treesize reduction 83, result has 44.7 percent of original size [2021-07-09 17:37:38,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:38,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:38,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:38,923 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:38,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:38,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:38,926 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:38,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:38,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:38,948 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:37:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:39,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334438850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:39,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:39,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:37:39,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651502996] [2021-07-09 17:37:39,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:37:39,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:39,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:37:39,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:39,026 INFO L87 Difference]: Start difference. First operand 164 states and 338 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:39,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:39,470 INFO L93 Difference]: Finished difference Result 192 states and 392 transitions. [2021-07-09 17:37:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:37:39,470 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:39,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:39,470 INFO L225 Difference]: With dead ends: 192 [2021-07-09 17:37:39,470 INFO L226 Difference]: Without dead ends: 180 [2021-07-09 17:37:39,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 516.9ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:37:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-07-09 17:37:39,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 165. [2021-07-09 17:37:39,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.0792682926829267) internal successors, (341), 164 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 341 transitions. [2021-07-09 17:37:39,472 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 341 transitions. Word has length 20 [2021-07-09 17:37:39,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:39,472 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 341 transitions. [2021-07-09 17:37:39,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:39,472 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 341 transitions. [2021-07-09 17:37:39,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:39,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:39,472 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:39,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3241 [2021-07-09 17:37:39,673 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:39,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:39,673 INFO L82 PathProgramCache]: Analyzing trace with hash -251095818, now seen corresponding path program 619 times [2021-07-09 17:37:39,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:39,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479318933] [2021-07-09 17:37:39,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:39,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:39,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479318933] [2021-07-09 17:37:39,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479318933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:39,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924471641] [2021-07-09 17:37:39,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:39,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:39,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:40,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:40,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:40,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:40,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:40,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:40,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:40,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:40,066 INFO L628 ElimStorePlain]: treesize reduction 46, result has 35.2 percent of original size [2021-07-09 17:37:40,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:40,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:40,069 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:40,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:40,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:40,076 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:37:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:40,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924471641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:40,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:40,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:37:40,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751804392] [2021-07-09 17:37:40,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:37:40,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:40,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:37:40,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:40,117 INFO L87 Difference]: Start difference. First operand 165 states and 341 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:40,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:40,538 INFO L93 Difference]: Finished difference Result 191 states and 388 transitions. [2021-07-09 17:37:40,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:37:40,539 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:40,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:40,539 INFO L225 Difference]: With dead ends: 191 [2021-07-09 17:37:40,539 INFO L226 Difference]: Without dead ends: 178 [2021-07-09 17:37:40,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 451.9ms TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:37:40,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-07-09 17:37:40,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 171. [2021-07-09 17:37:40,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.0764705882352943) internal successors, (353), 170 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:40,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 353 transitions. [2021-07-09 17:37:40,541 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 353 transitions. Word has length 20 [2021-07-09 17:37:40,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:40,541 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 353 transitions. [2021-07-09 17:37:40,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:40,541 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 353 transitions. [2021-07-09 17:37:40,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:40,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:40,541 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:40,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3244,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:40,742 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:40,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:40,742 INFO L82 PathProgramCache]: Analyzing trace with hash 885089454, now seen corresponding path program 620 times [2021-07-09 17:37:40,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:40,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132765293] [2021-07-09 17:37:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:40,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:40,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132765293] [2021-07-09 17:37:40,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132765293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:40,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990654191] [2021-07-09 17:37:40,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:40,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:40,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:40,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:40,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:41,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:41,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:41,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:41,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:41,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:41,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:41,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:41,132 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:37:41,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:41,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:41,146 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:41,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:41,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:41,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:41,173 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:41,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:41,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:41,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:41,198 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:41,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:41,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:41,218 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:37:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:41,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990654191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:41,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:41,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:37:41,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681166546] [2021-07-09 17:37:41,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:37:41,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:41,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:37:41,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:41,293 INFO L87 Difference]: Start difference. First operand 171 states and 353 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:41,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:41,691 INFO L93 Difference]: Finished difference Result 213 states and 421 transitions. [2021-07-09 17:37:41,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:37:41,692 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:41,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:41,692 INFO L225 Difference]: With dead ends: 213 [2021-07-09 17:37:41,692 INFO L226 Difference]: Without dead ends: 194 [2021-07-09 17:37:41,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 447.5ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:37:41,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-07-09 17:37:41,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 170. [2021-07-09 17:37:41,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.076923076923077) internal successors, (351), 169 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:41,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 351 transitions. [2021-07-09 17:37:41,694 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 351 transitions. Word has length 20 [2021-07-09 17:37:41,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:41,694 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 351 transitions. [2021-07-09 17:37:41,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:41,694 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 351 transitions. [2021-07-09 17:37:41,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:41,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:41,694 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:41,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3247,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:41,894 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:41,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:41,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1261081306, now seen corresponding path program 621 times [2021-07-09 17:37:41,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:41,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208126808] [2021-07-09 17:37:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:42,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:42,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208126808] [2021-07-09 17:37:42,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208126808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:42,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006302316] [2021-07-09 17:37:42,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:42,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:37:42,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:42,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:37:42,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:42,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:42,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:42,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:42,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:42,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:42,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:42,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:42,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:42,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:42,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:42,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:42,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:42,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:42,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:42,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:42,319 INFO L628 ElimStorePlain]: treesize reduction 77, result has 43.0 percent of original size [2021-07-09 17:37:42,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:42,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:42,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:42,323 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:42,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:42,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:42,327 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:42,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:42,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:42,346 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:161, output treesize:32 [2021-07-09 17:37:42,421 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:42,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006302316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:42,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:42,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:37:42,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655937282] [2021-07-09 17:37:42,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:37:42,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:42,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:37:42,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:42,422 INFO L87 Difference]: Start difference. First operand 170 states and 351 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:43,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:43,192 INFO L93 Difference]: Finished difference Result 222 states and 444 transitions. [2021-07-09 17:37:43,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:37:43,192 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:43,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:43,192 INFO L225 Difference]: With dead ends: 222 [2021-07-09 17:37:43,192 INFO L226 Difference]: Without dead ends: 203 [2021-07-09 17:37:43,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 817.4ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:37:43,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-07-09 17:37:43,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 169. [2021-07-09 17:37:43,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.0773809523809526) internal successors, (349), 168 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:43,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 349 transitions. [2021-07-09 17:37:43,194 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 349 transitions. Word has length 20 [2021-07-09 17:37:43,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:43,194 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 349 transitions. [2021-07-09 17:37:43,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:43,194 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 349 transitions. [2021-07-09 17:37:43,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:43,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:43,195 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:43,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 622 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3252 [2021-07-09 17:37:43,395 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:43,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:43,395 INFO L82 PathProgramCache]: Analyzing trace with hash 927101870, now seen corresponding path program 622 times [2021-07-09 17:37:43,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:43,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235829244] [2021-07-09 17:37:43,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:43,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:43,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235829244] [2021-07-09 17:37:43,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235829244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:43,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013045868] [2021-07-09 17:37:43,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:43,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:43,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:43,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:43,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:43,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:43,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:43,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:43,804 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:43,823 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,872 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-07-09 17:37:43,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:43,876 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:43,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:43,880 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:43,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:43,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:43,902 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:37:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:43,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013045868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:43,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:43,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:37:43,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923269315] [2021-07-09 17:37:43,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:37:43,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:43,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:37:43,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:43,982 INFO L87 Difference]: Start difference. First operand 169 states and 349 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:44,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:44,897 INFO L93 Difference]: Finished difference Result 262 states and 511 transitions. [2021-07-09 17:37:44,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:37:44,897 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:44,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:44,897 INFO L225 Difference]: With dead ends: 262 [2021-07-09 17:37:44,897 INFO L226 Difference]: Without dead ends: 229 [2021-07-09 17:37:44,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1001.5ms TimeCoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:37:44,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-07-09 17:37:44,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 173. [2021-07-09 17:37:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.0988372093023258) internal successors, (361), 172 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:44,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 361 transitions. [2021-07-09 17:37:44,899 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 361 transitions. Word has length 20 [2021-07-09 17:37:44,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:44,899 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 361 transitions. [2021-07-09 17:37:44,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:44,899 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 361 transitions. [2021-07-09 17:37:44,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:44,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:44,900 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:45,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3255,623 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:45,100 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:45,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:45,100 INFO L82 PathProgramCache]: Analyzing trace with hash 41303590, now seen corresponding path program 623 times [2021-07-09 17:37:45,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:45,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211910173] [2021-07-09 17:37:45,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:45,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:45,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211910173] [2021-07-09 17:37:45,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211910173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:45,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327999200] [2021-07-09 17:37:45,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:45,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:37:45,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:45,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:45,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:45,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:45,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:45,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:45,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:45,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:45,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:45,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:45,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:45,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:45,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:45,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:45,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:45,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:45,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:45,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:45,545 INFO L628 ElimStorePlain]: treesize reduction 90, result has 38.8 percent of original size [2021-07-09 17:37:45,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:45,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:45,549 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:45,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:45,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:45,571 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:173, output treesize:36 [2021-07-09 17:37:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:45,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327999200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:45,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:45,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:37:45,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214468576] [2021-07-09 17:37:45,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:37:45,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:45,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:37:45,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:45,648 INFO L87 Difference]: Start difference. First operand 173 states and 361 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:46,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:46,305 INFO L93 Difference]: Finished difference Result 232 states and 468 transitions. [2021-07-09 17:37:46,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:37:46,305 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:46,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:46,305 INFO L225 Difference]: With dead ends: 232 [2021-07-09 17:37:46,305 INFO L226 Difference]: Without dead ends: 213 [2021-07-09 17:37:46,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 715.4ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:37:46,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-09 17:37:46,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 174. [2021-07-09 17:37:46,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.1040462427745665) internal successors, (364), 173 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 364 transitions. [2021-07-09 17:37:46,307 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 364 transitions. Word has length 20 [2021-07-09 17:37:46,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:46,307 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 364 transitions. [2021-07-09 17:37:46,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:46,307 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 364 transitions. [2021-07-09 17:37:46,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:46,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:46,308 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:46,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3258 [2021-07-09 17:37:46,508 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:46,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:46,508 INFO L82 PathProgramCache]: Analyzing trace with hash 502100586, now seen corresponding path program 624 times [2021-07-09 17:37:46,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:46,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892699698] [2021-07-09 17:37:46,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:46,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:46,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892699698] [2021-07-09 17:37:46,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892699698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:46,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890494800] [2021-07-09 17:37:46,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:46,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:37:46,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:46,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:37:46,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:46,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:46,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:46,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:46,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:46,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:46,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:37:46,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:46,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:46,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:46,903 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 17:37:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:46,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890494800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:46,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:46,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:37:46,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662868749] [2021-07-09 17:37:46,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:37:46,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:46,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:37:46,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:46,940 INFO L87 Difference]: Start difference. First operand 174 states and 364 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:47,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:47,298 INFO L93 Difference]: Finished difference Result 210 states and 434 transitions. [2021-07-09 17:37:47,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:37:47,298 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:47,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:47,299 INFO L225 Difference]: With dead ends: 210 [2021-07-09 17:37:47,299 INFO L226 Difference]: Without dead ends: 203 [2021-07-09 17:37:47,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:37:47,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-07-09 17:37:47,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 175. [2021-07-09 17:37:47,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1091954022988504) internal successors, (367), 174 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:47,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 367 transitions. [2021-07-09 17:37:47,300 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 367 transitions. Word has length 20 [2021-07-09 17:37:47,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:47,301 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 367 transitions. [2021-07-09 17:37:47,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:47,301 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 367 transitions. [2021-07-09 17:37:47,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:47,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:47,301 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:47,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 625 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3261 [2021-07-09 17:37:47,501 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:47,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:47,501 INFO L82 PathProgramCache]: Analyzing trace with hash -39721038, now seen corresponding path program 625 times [2021-07-09 17:37:47,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:47,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396827714] [2021-07-09 17:37:47,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:47,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:47,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:47,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396827714] [2021-07-09 17:37:47,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396827714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:47,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298014632] [2021-07-09 17:37:47,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:47,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:47,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:47,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:47,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:47,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,938 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-07-09 17:37:47,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:47,941 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:47,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:47,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,948 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:37:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:47,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298014632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:47,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:47,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:37:47,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891205586] [2021-07-09 17:37:47,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:37:47,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:47,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:37:47,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:47,986 INFO L87 Difference]: Start difference. First operand 175 states and 367 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:48,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:48,391 INFO L93 Difference]: Finished difference Result 222 states and 451 transitions. [2021-07-09 17:37:48,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:37:48,391 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:48,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:48,391 INFO L225 Difference]: With dead ends: 222 [2021-07-09 17:37:48,391 INFO L226 Difference]: Without dead ends: 203 [2021-07-09 17:37:48,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 439.5ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:37:48,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-07-09 17:37:48,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 176. [2021-07-09 17:37:48,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.1085714285714285) internal successors, (369), 175 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:48,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 369 transitions. [2021-07-09 17:37:48,393 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 369 transitions. Word has length 20 [2021-07-09 17:37:48,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:48,393 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 369 transitions. [2021-07-09 17:37:48,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:48,393 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 369 transitions. [2021-07-09 17:37:48,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:48,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:48,393 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:48,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3265 [2021-07-09 17:37:48,594 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:48,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:48,594 INFO L82 PathProgramCache]: Analyzing trace with hash 912632170, now seen corresponding path program 626 times [2021-07-09 17:37:48,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:48,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232053283] [2021-07-09 17:37:48,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:48,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:48,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232053283] [2021-07-09 17:37:48,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232053283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:48,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849250136] [2021-07-09 17:37:48,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:48,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:48,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:48,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:37:48,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:49,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:49,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:49,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:49,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:49,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:49,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:49,169 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:49,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:49,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:49,175 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-07-09 17:37:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:49,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849250136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:49,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:49,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:49,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566886677] [2021-07-09 17:37:49,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:49,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:49,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:49,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:49,220 INFO L87 Difference]: Start difference. First operand 176 states and 369 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:49,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:49,567 INFO L93 Difference]: Finished difference Result 205 states and 418 transitions. [2021-07-09 17:37:49,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:37:49,567 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:49,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:49,568 INFO L225 Difference]: With dead ends: 205 [2021-07-09 17:37:49,568 INFO L226 Difference]: Without dead ends: 198 [2021-07-09 17:37:49,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 589.8ms TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:37:49,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-07-09 17:37:49,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 177. [2021-07-09 17:37:49,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.1136363636363638) internal successors, (372), 176 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:49,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 372 transitions. [2021-07-09 17:37:49,570 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 372 transitions. Word has length 20 [2021-07-09 17:37:49,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:49,570 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 372 transitions. [2021-07-09 17:37:49,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:49,570 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 372 transitions. [2021-07-09 17:37:49,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:49,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:49,570 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:49,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3268,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:49,770 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:49,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:49,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1774637234, now seen corresponding path program 627 times [2021-07-09 17:37:49,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:49,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277065931] [2021-07-09 17:37:49,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:49,959 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:49,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:49,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277065931] [2021-07-09 17:37:49,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277065931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:49,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460808913] [2021-07-09 17:37:49,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:49,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:49,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:49,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:49,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:50,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:50,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:50,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:50,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:50,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:50,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:50,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:50,300 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-07-09 17:37:50,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:50,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:50,303 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:50,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:50,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:50,310 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:37:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:50,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460808913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:50,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:50,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:50,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142520990] [2021-07-09 17:37:50,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:50,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:50,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:50,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:50,357 INFO L87 Difference]: Start difference. First operand 177 states and 372 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:50,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:50,893 INFO L93 Difference]: Finished difference Result 213 states and 434 transitions. [2021-07-09 17:37:50,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:37:50,894 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:50,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:50,894 INFO L225 Difference]: With dead ends: 213 [2021-07-09 17:37:50,894 INFO L226 Difference]: Without dead ends: 200 [2021-07-09 17:37:50,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 642.4ms TimeCoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:37:50,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-09 17:37:50,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 178. [2021-07-09 17:37:50,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1129943502824857) internal successors, (374), 177 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 374 transitions. [2021-07-09 17:37:50,896 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 374 transitions. Word has length 20 [2021-07-09 17:37:50,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:50,896 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 374 transitions. [2021-07-09 17:37:50,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:50,896 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 374 transitions. [2021-07-09 17:37:50,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:50,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:50,896 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:51,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3272 [2021-07-09 17:37:51,097 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:51,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:51,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1384144790, now seen corresponding path program 628 times [2021-07-09 17:37:51,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:51,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643090839] [2021-07-09 17:37:51,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:51,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:51,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643090839] [2021-07-09 17:37:51,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643090839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:51,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375339050] [2021-07-09 17:37:51,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:51,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:51,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:51,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:51,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:51,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:51,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:51,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:51,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:51,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:51,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:51,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:51,702 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:37:51,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:51,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:51,706 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:51,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:51,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:51,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:51,732 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:51,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:51,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:51,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:37:51,757 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:51,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:51,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:51,777 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:37:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:51,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375339050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:51,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:51,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:51,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041177872] [2021-07-09 17:37:51,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:51,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:51,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:51,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:51,868 INFO L87 Difference]: Start difference. First operand 178 states and 374 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:52,346 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-07-09 17:37:52,539 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-07-09 17:37:52,855 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-07-09 17:37:53,202 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-07-09 17:37:53,488 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-07-09 17:37:53,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:53,818 INFO L93 Difference]: Finished difference Result 386 states and 706 transitions. [2021-07-09 17:37:53,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:37:53,818 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:53,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:53,818 INFO L225 Difference]: With dead ends: 386 [2021-07-09 17:37:53,818 INFO L226 Difference]: Without dead ends: 339 [2021-07-09 17:37:53,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2065.8ms TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:37:53,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-09 17:37:53,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 183. [2021-07-09 17:37:53,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.1538461538461537) internal successors, (392), 182 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:53,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 392 transitions. [2021-07-09 17:37:53,821 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 392 transitions. Word has length 20 [2021-07-09 17:37:53,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:53,821 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 392 transitions. [2021-07-09 17:37:53,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:53,821 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 392 transitions. [2021-07-09 17:37:53,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:53,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:53,821 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:54,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 629 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-07-09 17:37:54,021 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:54,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:54,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1729663942, now seen corresponding path program 629 times [2021-07-09 17:37:54,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:54,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597902737] [2021-07-09 17:37:54,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:54,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:54,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597902737] [2021-07-09 17:37:54,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597902737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:54,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570107392] [2021-07-09 17:37:54,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:54,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:54,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:54,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:54,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:54,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:54,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:54,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:54,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:54,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:54,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:54,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:54,467 INFO L628 ElimStorePlain]: treesize reduction 40, result has 43.7 percent of original size [2021-07-09 17:37:54,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:54,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:37:54,469 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:54,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:54,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:54,476 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:37:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:54,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570107392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:54,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:54,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:54,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590739498] [2021-07-09 17:37:54,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:54,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:54,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:54,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:54,520 INFO L87 Difference]: Start difference. First operand 183 states and 392 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:54,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:54,771 INFO L93 Difference]: Finished difference Result 206 states and 428 transitions. [2021-07-09 17:37:54,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:54,772 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:54,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:54,772 INFO L225 Difference]: With dead ends: 206 [2021-07-09 17:37:54,772 INFO L226 Difference]: Without dead ends: 187 [2021-07-09 17:37:54,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 420.1ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:37:54,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-07-09 17:37:54,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2021-07-09 17:37:54,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.152173913043478) internal successors, (396), 184 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:54,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 396 transitions. [2021-07-09 17:37:54,774 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 396 transitions. Word has length 20 [2021-07-09 17:37:54,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:54,774 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 396 transitions. [2021-07-09 17:37:54,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:54,774 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 396 transitions. [2021-07-09 17:37:54,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:54,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:54,774 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:54,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3281,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:54,975 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:54,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:54,975 INFO L82 PathProgramCache]: Analyzing trace with hash -777310734, now seen corresponding path program 630 times [2021-07-09 17:37:54,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:54,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880479003] [2021-07-09 17:37:54,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:55,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:55,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880479003] [2021-07-09 17:37:55,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880479003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:55,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265888940] [2021-07-09 17:37:55,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:55,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:37:55,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:55,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:37:55,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:55,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:55,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:55,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:55,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:55,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:55,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:37:55,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:55,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:55,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:55,491 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 17:37:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:55,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265888940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:55,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:55,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:55,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583267494] [2021-07-09 17:37:55,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:55,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:55,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:55,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:55,532 INFO L87 Difference]: Start difference. First operand 185 states and 396 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:55,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:55,836 INFO L93 Difference]: Finished difference Result 204 states and 428 transitions. [2021-07-09 17:37:55,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:55,837 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:55,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:55,837 INFO L225 Difference]: With dead ends: 204 [2021-07-09 17:37:55,837 INFO L226 Difference]: Without dead ends: 197 [2021-07-09 17:37:55,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 569.0ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:37:55,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-09 17:37:55,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 186. [2021-07-09 17:37:55,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.156756756756757) internal successors, (399), 185 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 399 transitions. [2021-07-09 17:37:55,839 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 399 transitions. Word has length 20 [2021-07-09 17:37:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:55,839 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 399 transitions. [2021-07-09 17:37:55,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:55,839 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 399 transitions. [2021-07-09 17:37:55,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:55,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:55,839 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:56,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3285 [2021-07-09 17:37:56,040 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:56,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:56,040 INFO L82 PathProgramCache]: Analyzing trace with hash 84694330, now seen corresponding path program 631 times [2021-07-09 17:37:56,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:56,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408937554] [2021-07-09 17:37:56,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:56,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:56,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:56,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408937554] [2021-07-09 17:37:56,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408937554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:56,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533625653] [2021-07-09 17:37:56,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:56,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:56,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:56,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:56,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:56,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,516 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-07-09 17:37:56,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:56,519 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:56,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:56,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,527 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:37:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:56,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533625653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:56,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:56,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:56,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484299077] [2021-07-09 17:37:56,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:56,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:56,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:56,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:56,570 INFO L87 Difference]: Start difference. First operand 186 states and 399 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:57,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:57,024 INFO L93 Difference]: Finished difference Result 215 states and 449 transitions. [2021-07-09 17:37:57,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:37:57,025 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:57,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:57,025 INFO L225 Difference]: With dead ends: 215 [2021-07-09 17:37:57,025 INFO L226 Difference]: Without dead ends: 202 [2021-07-09 17:37:57,025 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 579.8ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:37:57,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-09 17:37:57,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 187. [2021-07-09 17:37:57,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.1559139784946235) internal successors, (401), 186 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:57,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 401 transitions. [2021-07-09 17:37:57,027 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 401 transitions. Word has length 20 [2021-07-09 17:37:57,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:57,027 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 401 transitions. [2021-07-09 17:37:57,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:57,027 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 401 transitions. [2021-07-09 17:37:57,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:57,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:57,027 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:57,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3288,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:57,228 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:57,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:57,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1220879602, now seen corresponding path program 632 times [2021-07-09 17:37:57,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:57,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193670966] [2021-07-09 17:37:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:57,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:57,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193670966] [2021-07-09 17:37:57,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193670966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:57,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389458399] [2021-07-09 17:37:57,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:57,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:57,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:57,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:37:57,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:57,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:57,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:57,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:57,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:57,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:57,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:57,694 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:57,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:57,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:57,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:57,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:57,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:57,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:57,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:57,740 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:57,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:57,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:57,758 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:37:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:57,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389458399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:57,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:57,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:57,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838586791] [2021-07-09 17:37:57,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:57,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:57,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:57,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:57,838 INFO L87 Difference]: Start difference. First operand 187 states and 401 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:58,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:58,344 INFO L93 Difference]: Finished difference Result 237 states and 485 transitions. [2021-07-09 17:37:58,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:37:58,345 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:58,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:58,345 INFO L225 Difference]: With dead ends: 237 [2021-07-09 17:37:58,345 INFO L226 Difference]: Without dead ends: 221 [2021-07-09 17:37:58,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 615.7ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:37:58,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-07-09 17:37:58,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 188. [2021-07-09 17:37:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.160427807486631) internal successors, (404), 187 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:58,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 404 transitions. [2021-07-09 17:37:58,347 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 404 transitions. Word has length 20 [2021-07-09 17:37:58,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:58,347 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 404 transitions. [2021-07-09 17:37:58,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:58,347 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 404 transitions. [2021-07-09 17:37:58,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:58,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:58,347 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:58,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3292 [2021-07-09 17:37:58,548 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:58,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:58,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1663109014, now seen corresponding path program 633 times [2021-07-09 17:37:58,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:58,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723568556] [2021-07-09 17:37:58,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:58,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:58,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723568556] [2021-07-09 17:37:58,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723568556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:58,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947574076] [2021-07-09 17:37:58,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:58,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:37:58,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:58,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:58,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:58,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:58,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:58,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:58,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:58,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:58,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:58,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:58,996 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-07-09 17:37:58,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:58,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:37:58,999 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:37:59,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:59,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:59,006 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:37:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:59,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947574076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:59,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:59,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:59,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512757334] [2021-07-09 17:37:59,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:59,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:59,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:59,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:59,049 INFO L87 Difference]: Start difference. First operand 188 states and 404 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:59,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:59,280 INFO L93 Difference]: Finished difference Result 208 states and 435 transitions. [2021-07-09 17:37:59,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:37:59,281 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:59,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:59,281 INFO L225 Difference]: With dead ends: 208 [2021-07-09 17:37:59,281 INFO L226 Difference]: Without dead ends: 192 [2021-07-09 17:37:59,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 429.3ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:37:59,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-07-09 17:37:59,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2021-07-09 17:37:59,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.1587301587301586) internal successors, (408), 189 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:59,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 408 transitions. [2021-07-09 17:37:59,283 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 408 transitions. Word has length 20 [2021-07-09 17:37:59,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:59,283 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 408 transitions. [2021-07-09 17:37:59,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:59,283 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 408 transitions. [2021-07-09 17:37:59,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:59,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:59,283 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:59,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 634 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3297 [2021-07-09 17:37:59,483 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:59,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:59,484 INFO L82 PathProgramCache]: Analyzing trace with hash -801103950, now seen corresponding path program 634 times [2021-07-09 17:37:59,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:59,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863425136] [2021-07-09 17:37:59,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:59,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:59,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863425136] [2021-07-09 17:37:59,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863425136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:59,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685532743] [2021-07-09 17:37:59,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:59,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:59,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:59,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:37:59,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:59,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:59,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:59,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:59,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:59,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:59,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:59,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:59,939 INFO L628 ElimStorePlain]: treesize reduction 34, result has 47.7 percent of original size [2021-07-09 17:37:59,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:59,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:37:59,941 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:59,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:59,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:37:59,948 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:37:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:59,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685532743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:59,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:59,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:59,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867447370] [2021-07-09 17:37:59,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:59,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:59,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:59,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:59,991 INFO L87 Difference]: Start difference. First operand 190 states and 408 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:00,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:00,416 INFO L93 Difference]: Finished difference Result 209 states and 441 transitions. [2021-07-09 17:38:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:38:00,416 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:00,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:00,417 INFO L225 Difference]: With dead ends: 209 [2021-07-09 17:38:00,417 INFO L226 Difference]: Without dead ends: 196 [2021-07-09 17:38:00,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 519.9ms TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:38:00,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-07-09 17:38:00,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 191. [2021-07-09 17:38:00,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1578947368421053) internal successors, (410), 190 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:00,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 410 transitions. [2021-07-09 17:38:00,418 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 410 transitions. Word has length 20 [2021-07-09 17:38:00,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:00,419 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 410 transitions. [2021-07-09 17:38:00,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:00,419 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 410 transitions. [2021-07-09 17:38:00,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:00,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:00,419 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:00,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3301,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:00,628 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:00,628 INFO L82 PathProgramCache]: Analyzing trace with hash 335081322, now seen corresponding path program 635 times [2021-07-09 17:38:00,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:00,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116181162] [2021-07-09 17:38:00,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:00,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:00,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116181162] [2021-07-09 17:38:00,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116181162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:00,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226538483] [2021-07-09 17:38:00,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:00,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:38:00,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:00,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:00,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:01,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:01,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:01,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:01,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:01,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:01,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:01,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:01,126 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-07-09 17:38:01,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:01,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:01,130 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:01,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:01,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:01,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:01,156 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:01,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:01,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:01,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:01,181 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:01,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:01,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:01,201 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:38:01,284 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:01,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226538483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:01,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:01,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:01,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108287035] [2021-07-09 17:38:01,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:01,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:01,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:01,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:01,285 INFO L87 Difference]: Start difference. First operand 191 states and 410 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:01,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:01,787 INFO L93 Difference]: Finished difference Result 231 states and 474 transitions. [2021-07-09 17:38:01,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:38:01,787 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:01,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:01,787 INFO L225 Difference]: With dead ends: 231 [2021-07-09 17:38:01,787 INFO L226 Difference]: Without dead ends: 212 [2021-07-09 17:38:01,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 636.5ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:38:01,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-07-09 17:38:01,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 188. [2021-07-09 17:38:01,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.160427807486631) internal successors, (404), 187 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 404 transitions. [2021-07-09 17:38:01,789 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 404 transitions. Word has length 20 [2021-07-09 17:38:01,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:01,789 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 404 transitions. [2021-07-09 17:38:01,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:01,789 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 404 transitions. [2021-07-09 17:38:01,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:01,790 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:01,790 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:01,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3304,636 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:01,990 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:01,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:01,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1716680882, now seen corresponding path program 636 times [2021-07-09 17:38:01,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:01,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014621055] [2021-07-09 17:38:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:02,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:02,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014621055] [2021-07-09 17:38:02,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014621055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:02,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868244477] [2021-07-09 17:38:02,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:02,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:38:02,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:02,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:38:02,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:02,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:02,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:02,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:02,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:02,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:02,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:02,424 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:02,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:02,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:02,430 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-07-09 17:38:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:02,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868244477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:02,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:02,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:02,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760183686] [2021-07-09 17:38:02,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:02,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:02,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:02,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:02,472 INFO L87 Difference]: Start difference. First operand 188 states and 404 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:02,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:02,695 INFO L93 Difference]: Finished difference Result 210 states and 441 transitions. [2021-07-09 17:38:02,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:02,695 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:02,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:02,695 INFO L225 Difference]: With dead ends: 210 [2021-07-09 17:38:02,696 INFO L226 Difference]: Without dead ends: 203 [2021-07-09 17:38:02,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 393.4ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:38:02,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-07-09 17:38:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 189. [2021-07-09 17:38:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.1648936170212765) internal successors, (407), 188 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:02,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 407 transitions. [2021-07-09 17:38:02,697 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 407 transitions. Word has length 20 [2021-07-09 17:38:02,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:02,697 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 407 transitions. [2021-07-09 17:38:02,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:02,698 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 407 transitions. [2021-07-09 17:38:02,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:02,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:02,698 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:02,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3309,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:02,898 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:02,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:02,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1625933206, now seen corresponding path program 637 times [2021-07-09 17:38:02,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:02,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990957863] [2021-07-09 17:38:02,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:03,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:03,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990957863] [2021-07-09 17:38:03,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990957863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:03,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291439093] [2021-07-09 17:38:03,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:03,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:03,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:03,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:03,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:03,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,406 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-07-09 17:38:03,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:03,410 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:03,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:03,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,417 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:38:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:03,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291439093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:03,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:03,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:03,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210725954] [2021-07-09 17:38:03,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:03,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:03,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:03,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:03,460 INFO L87 Difference]: Start difference. First operand 189 states and 407 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:03,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:03,788 INFO L93 Difference]: Finished difference Result 214 states and 446 transitions. [2021-07-09 17:38:03,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:38:03,788 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:03,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:03,788 INFO L225 Difference]: With dead ends: 214 [2021-07-09 17:38:03,788 INFO L226 Difference]: Without dead ends: 198 [2021-07-09 17:38:03,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 512.4ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:38:03,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-07-09 17:38:03,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 190. [2021-07-09 17:38:03,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.164021164021164) internal successors, (409), 189 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:03,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 409 transitions. [2021-07-09 17:38:03,790 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 409 transitions. Word has length 20 [2021-07-09 17:38:03,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:03,790 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 409 transitions. [2021-07-09 17:38:03,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:03,790 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 409 transitions. [2021-07-09 17:38:03,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:03,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:03,791 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:03,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3313,638 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:03,991 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:03,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:03,991 INFO L82 PathProgramCache]: Analyzing trace with hash -763928142, now seen corresponding path program 638 times [2021-07-09 17:38:03,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:03,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138537276] [2021-07-09 17:38:03,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:04,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:04,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138537276] [2021-07-09 17:38:04,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138537276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:04,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944530891] [2021-07-09 17:38:04,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:04,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:04,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:04,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:38:04,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:04,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:04,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:04,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:04,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:04,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:04,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:04,545 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:04,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:04,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:04,551 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 17:38:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:04,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944530891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:04,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:04,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:04,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68061195] [2021-07-09 17:38:04,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:04,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:04,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:04,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:04,592 INFO L87 Difference]: Start difference. First operand 190 states and 409 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:04,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:04,977 INFO L93 Difference]: Finished difference Result 216 states and 453 transitions. [2021-07-09 17:38:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:04,977 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:04,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:04,977 INFO L225 Difference]: With dead ends: 216 [2021-07-09 17:38:04,977 INFO L226 Difference]: Without dead ends: 209 [2021-07-09 17:38:04,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 627.8ms TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:38:04,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-07-09 17:38:04,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 191. [2021-07-09 17:38:04,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.168421052631579) internal successors, (412), 190 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 412 transitions. [2021-07-09 17:38:04,979 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 412 transitions. Word has length 20 [2021-07-09 17:38:04,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:04,979 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 412 transitions. [2021-07-09 17:38:04,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:04,979 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 412 transitions. [2021-07-09 17:38:04,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:04,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:04,980 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:05,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3316,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:05,180 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:05,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:05,180 INFO L82 PathProgramCache]: Analyzing trace with hash 372257130, now seen corresponding path program 639 times [2021-07-09 17:38:05,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:05,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284720064] [2021-07-09 17:38:05,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:05,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:05,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284720064] [2021-07-09 17:38:05,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284720064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:05,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180267651] [2021-07-09 17:38:05,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:05,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:38:05,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:05,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:38:05,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:05,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:05,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:05,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:05,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:05,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:05,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:05,680 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:05,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:05,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:05,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:05,703 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:05,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:05,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:05,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:05,728 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:05,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:05,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:05,746 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:38:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:05,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180267651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:05,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:05,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:05,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314062426] [2021-07-09 17:38:05,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:05,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:05,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:05,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:05,826 INFO L87 Difference]: Start difference. First operand 191 states and 412 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:06,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:06,470 INFO L93 Difference]: Finished difference Result 244 states and 501 transitions. [2021-07-09 17:38:06,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:38:06,470 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:06,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:06,471 INFO L225 Difference]: With dead ends: 244 [2021-07-09 17:38:06,471 INFO L226 Difference]: Without dead ends: 228 [2021-07-09 17:38:06,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 772.3ms TimeCoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:38:06,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-09 17:38:06,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 191. [2021-07-09 17:38:06,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.168421052631579) internal successors, (412), 190 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:06,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 412 transitions. [2021-07-09 17:38:06,473 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 412 transitions. Word has length 20 [2021-07-09 17:38:06,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:06,473 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 412 transitions. [2021-07-09 17:38:06,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:06,473 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 412 transitions. [2021-07-09 17:38:06,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:06,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:06,473 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:06,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3320 [2021-07-09 17:38:06,674 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:06,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:06,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1783235810, now seen corresponding path program 640 times [2021-07-09 17:38:06,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:06,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677193802] [2021-07-09 17:38:06,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:06,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:06,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677193802] [2021-07-09 17:38:06,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677193802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:06,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169364929] [2021-07-09 17:38:06,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:06,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:06,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:06,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:06,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:07,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:07,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:07,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:07,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:07,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:07,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:07,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:07,111 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-07-09 17:38:07,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:07,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:07,115 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:07,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:07,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:07,122 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:38:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:07,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169364929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:07,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:07,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:07,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024548260] [2021-07-09 17:38:07,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:07,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:07,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:07,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:07,162 INFO L87 Difference]: Start difference. First operand 191 states and 412 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:07,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:07,413 INFO L93 Difference]: Finished difference Result 210 states and 441 transitions. [2021-07-09 17:38:07,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:38:07,414 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:07,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:07,414 INFO L225 Difference]: With dead ends: 210 [2021-07-09 17:38:07,414 INFO L226 Difference]: Without dead ends: 194 [2021-07-09 17:38:07,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 425.0ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:38:07,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-07-09 17:38:07,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2021-07-09 17:38:07,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.167539267015707) internal successors, (414), 191 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:07,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 414 transitions. [2021-07-09 17:38:07,416 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 414 transitions. Word has length 20 [2021-07-09 17:38:07,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:07,416 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 414 transitions. [2021-07-09 17:38:07,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:07,416 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 414 transitions. [2021-07-09 17:38:07,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:07,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:07,416 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:07,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3325,641 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:07,616 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:07,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:07,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1649726422, now seen corresponding path program 641 times [2021-07-09 17:38:07,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:07,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634227889] [2021-07-09 17:38:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:07,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:07,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634227889] [2021-07-09 17:38:07,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634227889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:07,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566399924] [2021-07-09 17:38:07,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:07,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:38:07,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:07,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:07,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:08,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:08,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:08,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,068 INFO L628 ElimStorePlain]: treesize reduction 34, result has 47.7 percent of original size [2021-07-09 17:38:08,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:38:08,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:08,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,078 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:38:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:08,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566399924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:08,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:08,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:08,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121662304] [2021-07-09 17:38:08,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:08,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:08,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:08,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:08,119 INFO L87 Difference]: Start difference. First operand 192 states and 414 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:08,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:08,604 INFO L93 Difference]: Finished difference Result 211 states and 447 transitions. [2021-07-09 17:38:08,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:38:08,604 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:08,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:08,605 INFO L225 Difference]: With dead ends: 211 [2021-07-09 17:38:08,605 INFO L226 Difference]: Without dead ends: 198 [2021-07-09 17:38:08,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 613.4ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:38:08,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-07-09 17:38:08,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 193. [2021-07-09 17:38:08,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1666666666666665) internal successors, (416), 192 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:08,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 416 transitions. [2021-07-09 17:38:08,607 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 416 transitions. Word has length 20 [2021-07-09 17:38:08,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:08,607 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 416 transitions. [2021-07-09 17:38:08,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:08,607 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 416 transitions. [2021-07-09 17:38:08,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:08,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:08,607 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:08,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3329,642 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:08,808 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:08,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:08,808 INFO L82 PathProgramCache]: Analyzing trace with hash -513541150, now seen corresponding path program 642 times [2021-07-09 17:38:08,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:08,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996809933] [2021-07-09 17:38:08,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:09,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:09,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996809933] [2021-07-09 17:38:09,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996809933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:09,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149151198] [2021-07-09 17:38:09,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:09,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:38:09,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:09,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:09,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:09,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:09,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:09,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:09,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:09,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:09,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:09,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:09,331 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:38:09,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:09,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:09,341 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:09,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:09,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:09,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:09,372 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:09,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:09,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:09,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:09,398 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:09,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:09,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:09,420 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:38:09,501 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:09,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149151198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:09,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:09,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:09,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144523056] [2021-07-09 17:38:09,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:09,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:09,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:09,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:09,502 INFO L87 Difference]: Start difference. First operand 193 states and 416 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:09,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:09,856 INFO L93 Difference]: Finished difference Result 211 states and 445 transitions. [2021-07-09 17:38:09,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:09,856 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:09,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:09,856 INFO L225 Difference]: With dead ends: 211 [2021-07-09 17:38:09,856 INFO L226 Difference]: Without dead ends: 199 [2021-07-09 17:38:09,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 611.4ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:38:09,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-09 17:38:09,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 190. [2021-07-09 17:38:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.1693121693121693) internal successors, (410), 189 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:09,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 410 transitions. [2021-07-09 17:38:09,858 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 410 transitions. Word has length 20 [2021-07-09 17:38:09,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:09,858 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 410 transitions. [2021-07-09 17:38:09,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:09,858 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 410 transitions. [2021-07-09 17:38:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:09,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:09,858 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:10,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3333,643 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:10,059 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:10,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:10,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1696778674, now seen corresponding path program 643 times [2021-07-09 17:38:10,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:10,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929629446] [2021-07-09 17:38:10,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:10,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:10,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929629446] [2021-07-09 17:38:10,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929629446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:10,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101855352] [2021-07-09 17:38:10,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:10,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:10,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:10,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:10,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:10,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:10,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:10,464 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-07-09 17:38:10,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:10,467 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:10,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:10,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:10,475 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:38:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:10,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101855352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:10,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:10,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:38:10,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601700672] [2021-07-09 17:38:10,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:38:10,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:10,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:38:10,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:10,513 INFO L87 Difference]: Start difference. First operand 190 states and 410 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:10,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:10,924 INFO L93 Difference]: Finished difference Result 224 states and 473 transitions. [2021-07-09 17:38:10,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:38:10,924 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:10,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:10,925 INFO L225 Difference]: With dead ends: 224 [2021-07-09 17:38:10,925 INFO L226 Difference]: Without dead ends: 205 [2021-07-09 17:38:10,925 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 447.4ms TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:38:10,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-09 17:38:10,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 192. [2021-07-09 17:38:10,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.167539267015707) internal successors, (414), 191 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:10,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 414 transitions. [2021-07-09 17:38:10,926 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 414 transitions. Word has length 20 [2021-07-09 17:38:10,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:10,926 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 414 transitions. [2021-07-09 17:38:10,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:10,927 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 414 transitions. [2021-07-09 17:38:10,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:10,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:10,927 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:11,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3338,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:11,127 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:11,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:11,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1645835414, now seen corresponding path program 644 times [2021-07-09 17:38:11,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:11,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881802723] [2021-07-09 17:38:11,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:11,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:11,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881802723] [2021-07-09 17:38:11,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881802723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:11,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452547349] [2021-07-09 17:38:11,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:11,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:11,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:11,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:38:11,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:11,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:11,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:11,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:11,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:11,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:11,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:11,595 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:11,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:11,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:11,602 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-07-09 17:38:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:11,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452547349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:11,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:11,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:11,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20037241] [2021-07-09 17:38:11,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:11,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:11,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:11,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:11,644 INFO L87 Difference]: Start difference. First operand 192 states and 414 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:12,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:12,004 INFO L93 Difference]: Finished difference Result 211 states and 446 transitions. [2021-07-09 17:38:12,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:38:12,004 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:12,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:12,004 INFO L225 Difference]: With dead ends: 211 [2021-07-09 17:38:12,004 INFO L226 Difference]: Without dead ends: 204 [2021-07-09 17:38:12,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 483.0ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:38:12,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-07-09 17:38:12,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 193. [2021-07-09 17:38:12,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.171875) internal successors, (417), 192 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:12,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 417 transitions. [2021-07-09 17:38:12,006 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 417 transitions. Word has length 20 [2021-07-09 17:38:12,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:12,006 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 417 transitions. [2021-07-09 17:38:12,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:12,006 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 417 transitions. [2021-07-09 17:38:12,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:12,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:12,007 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:12,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3342 [2021-07-09 17:38:12,207 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:12,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:12,207 INFO L82 PathProgramCache]: Analyzing trace with hash -783830350, now seen corresponding path program 645 times [2021-07-09 17:38:12,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:12,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693043838] [2021-07-09 17:38:12,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:12,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:12,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693043838] [2021-07-09 17:38:12,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693043838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:12,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377982338] [2021-07-09 17:38:12,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:12,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:38:12,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:12,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:12,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:12,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:12,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:12,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:12,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:12,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:12,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:12,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:12,696 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-07-09 17:38:12,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:12,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:12,699 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:12,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:12,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:12,706 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:38:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:12,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377982338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:12,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:12,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:12,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035969655] [2021-07-09 17:38:12,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:12,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:12,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:12,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:12,749 INFO L87 Difference]: Start difference. First operand 193 states and 417 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:13,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:13,278 INFO L93 Difference]: Finished difference Result 223 states and 469 transitions. [2021-07-09 17:38:13,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:38:13,279 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:13,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:13,279 INFO L225 Difference]: With dead ends: 223 [2021-07-09 17:38:13,279 INFO L226 Difference]: Without dead ends: 210 [2021-07-09 17:38:13,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 592.9ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:38:13,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-07-09 17:38:13,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 194. [2021-07-09 17:38:13,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.1709844559585494) internal successors, (419), 193 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:13,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 419 transitions. [2021-07-09 17:38:13,281 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 419 transitions. Word has length 20 [2021-07-09 17:38:13,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:13,281 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 419 transitions. [2021-07-09 17:38:13,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:13,281 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 419 transitions. [2021-07-09 17:38:13,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:13,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:13,281 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:13,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3345,646 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:13,482 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:13,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:13,482 INFO L82 PathProgramCache]: Analyzing trace with hash 352354922, now seen corresponding path program 646 times [2021-07-09 17:38:13,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:13,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089076817] [2021-07-09 17:38:13,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:13,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:13,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089076817] [2021-07-09 17:38:13,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089076817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:13,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357243987] [2021-07-09 17:38:13,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:13,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:13,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:13,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:13,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:13,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:13,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:13,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:13,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:13,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:13,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:13,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:14,023 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:38:14,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:14,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:14,026 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:14,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:14,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:14,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:14,051 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:14,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:14,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:14,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:14,081 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:14,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:14,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:14,102 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:38:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:14,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357243987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:14,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:14,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:38:14,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858280374] [2021-07-09 17:38:14,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:38:14,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:14,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:38:14,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:14,181 INFO L87 Difference]: Start difference. First operand 194 states and 419 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:14,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:14,707 INFO L93 Difference]: Finished difference Result 246 states and 504 transitions. [2021-07-09 17:38:14,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:38:14,707 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:14,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:14,707 INFO L225 Difference]: With dead ends: 246 [2021-07-09 17:38:14,707 INFO L226 Difference]: Without dead ends: 227 [2021-07-09 17:38:14,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 664.7ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:38:14,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-09 17:38:14,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 193. [2021-07-09 17:38:14,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.171875) internal successors, (417), 192 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:14,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 417 transitions. [2021-07-09 17:38:14,709 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 417 transitions. Word has length 20 [2021-07-09 17:38:14,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:14,709 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 417 transitions. [2021-07-09 17:38:14,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:14,709 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 417 transitions. [2021-07-09 17:38:14,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:14,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:14,710 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:14,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3349,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:14,910 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:14,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:14,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1763333602, now seen corresponding path program 647 times [2021-07-09 17:38:14,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:14,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550048507] [2021-07-09 17:38:14,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:15,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:15,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550048507] [2021-07-09 17:38:15,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550048507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:15,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726476168] [2021-07-09 17:38:15,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:15,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:38:15,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:15,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:15,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:15,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:15,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:15,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:15,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:15,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:15,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:15,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:15,351 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-07-09 17:38:15,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:15,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:15,355 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:15,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:15,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:15,362 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:38:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:15,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726476168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:15,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:15,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:38:15,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300051680] [2021-07-09 17:38:15,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:38:15,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:15,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:38:15,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:15,400 INFO L87 Difference]: Start difference. First operand 193 states and 417 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:15,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:15,698 INFO L93 Difference]: Finished difference Result 213 states and 448 transitions. [2021-07-09 17:38:15,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:38:15,698 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:15,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:15,699 INFO L225 Difference]: With dead ends: 213 [2021-07-09 17:38:15,699 INFO L226 Difference]: Without dead ends: 197 [2021-07-09 17:38:15,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 445.5ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:38:15,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-09 17:38:15,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2021-07-09 17:38:15,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.170103092783505) internal successors, (421), 194 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 421 transitions. [2021-07-09 17:38:15,700 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 421 transitions. Word has length 20 [2021-07-09 17:38:15,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:15,700 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 421 transitions. [2021-07-09 17:38:15,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:15,700 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 421 transitions. [2021-07-09 17:38:15,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:15,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:15,701 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:15,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,648 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:15,901 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:15,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:15,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1669628630, now seen corresponding path program 648 times [2021-07-09 17:38:15,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:15,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447156816] [2021-07-09 17:38:15,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:16,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:16,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447156816] [2021-07-09 17:38:16,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447156816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:16,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542217619] [2021-07-09 17:38:16,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:16,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:38:16,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:16,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:16,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:16,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:16,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:16,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,362 INFO L628 ElimStorePlain]: treesize reduction 40, result has 43.7 percent of original size [2021-07-09 17:38:16,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:38:16,365 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:16,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,372 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:38:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:16,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542217619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:16,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:16,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:16,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244580348] [2021-07-09 17:38:16,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:16,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:16,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:16,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:16,415 INFO L87 Difference]: Start difference. First operand 195 states and 421 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:16,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:16,916 INFO L93 Difference]: Finished difference Result 215 states and 456 transitions. [2021-07-09 17:38:16,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:38:16,916 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:16,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:16,916 INFO L225 Difference]: With dead ends: 215 [2021-07-09 17:38:16,916 INFO L226 Difference]: Without dead ends: 202 [2021-07-09 17:38:16,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 663.6ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:38:16,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-09 17:38:16,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 196. [2021-07-09 17:38:16,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.169230769230769) internal successors, (423), 195 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:16,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 423 transitions. [2021-07-09 17:38:16,918 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 423 transitions. Word has length 20 [2021-07-09 17:38:16,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:16,918 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 423 transitions. [2021-07-09 17:38:16,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:16,918 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 423 transitions. [2021-07-09 17:38:16,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:16,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:16,919 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:17,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3357,649 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:17,119 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:17,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:17,119 INFO L82 PathProgramCache]: Analyzing trace with hash -533443358, now seen corresponding path program 649 times [2021-07-09 17:38:17,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:17,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073575461] [2021-07-09 17:38:17,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:17,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:17,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073575461] [2021-07-09 17:38:17,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073575461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:17,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664377881] [2021-07-09 17:38:17,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:17,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:17,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:17,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:17,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:17,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:17,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:17,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:17,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:17,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:17,580 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:38:17,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:17,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:17,584 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:17,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:17,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:17,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:17,612 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:17,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:17,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:17,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:17,639 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:17,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:17,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:17,660 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:38:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:17,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664377881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:17,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:17,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:38:17,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610643946] [2021-07-09 17:38:17,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:38:17,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:17,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:38:17,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:17,737 INFO L87 Difference]: Start difference. First operand 196 states and 423 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:18,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:18,188 INFO L93 Difference]: Finished difference Result 216 states and 456 transitions. [2021-07-09 17:38:18,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:38:18,189 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:18,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:18,189 INFO L225 Difference]: With dead ends: 216 [2021-07-09 17:38:18,189 INFO L226 Difference]: Without dead ends: 204 [2021-07-09 17:38:18,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 584.4ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:38:18,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-07-09 17:38:18,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 194. [2021-07-09 17:38:18,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.1709844559585494) internal successors, (419), 193 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 419 transitions. [2021-07-09 17:38:18,191 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 419 transitions. Word has length 20 [2021-07-09 17:38:18,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:18,191 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 419 transitions. [2021-07-09 17:38:18,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:18,191 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 419 transitions. [2021-07-09 17:38:18,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:18,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:18,191 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:18,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 650 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3360 [2021-07-09 17:38:18,392 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:18,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:18,392 INFO L82 PathProgramCache]: Analyzing trace with hash 518554546, now seen corresponding path program 650 times [2021-07-09 17:38:18,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:18,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792291925] [2021-07-09 17:38:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:18,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:18,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792291925] [2021-07-09 17:38:18,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792291925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:18,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446499325] [2021-07-09 17:38:18,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:18,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:18,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:18,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:38:18,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:18,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:18,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:18,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:18,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:18,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:18,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:18,842 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:18,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:18,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:18,848 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 17:38:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:18,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446499325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:18,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:18,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:38:18,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373383503] [2021-07-09 17:38:18,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:38:18,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:18,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:38:18,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:18,883 INFO L87 Difference]: Start difference. First operand 194 states and 419 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:19,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:19,229 INFO L93 Difference]: Finished difference Result 219 states and 467 transitions. [2021-07-09 17:38:19,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:38:19,229 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:19,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:19,230 INFO L225 Difference]: With dead ends: 219 [2021-07-09 17:38:19,230 INFO L226 Difference]: Without dead ends: 212 [2021-07-09 17:38:19,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 444.1ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:38:19,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-07-09 17:38:19,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 196. [2021-07-09 17:38:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.174358974358974) internal successors, (424), 195 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 424 transitions. [2021-07-09 17:38:19,232 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 424 transitions. Word has length 20 [2021-07-09 17:38:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:19,232 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 424 transitions. [2021-07-09 17:38:19,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 424 transitions. [2021-07-09 17:38:19,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:19,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:19,232 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:19,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3365,651 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:19,433 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:19,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:19,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1654739818, now seen corresponding path program 651 times [2021-07-09 17:38:19,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:19,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259142361] [2021-07-09 17:38:19,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:19,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:19,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259142361] [2021-07-09 17:38:19,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259142361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:19,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253094343] [2021-07-09 17:38:19,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:19,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:38:19,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:19,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:19,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:19,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:19,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:19,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:19,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:19,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:19,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:19,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:19,839 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:38:19,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:19,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:19,843 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:19,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:19,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:19,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:19,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:19,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:19,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:19,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:19,895 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:19,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:19,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:19,916 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:38:19,993 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:19,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253094343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:19,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:19,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:38:19,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269930049] [2021-07-09 17:38:19,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:38:19,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:19,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:38:19,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:19,994 INFO L87 Difference]: Start difference. First operand 196 states and 424 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:20,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:20,314 INFO L93 Difference]: Finished difference Result 225 states and 473 transitions. [2021-07-09 17:38:20,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:38:20,314 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:20,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:20,315 INFO L225 Difference]: With dead ends: 225 [2021-07-09 17:38:20,315 INFO L226 Difference]: Without dead ends: 213 [2021-07-09 17:38:20,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 437.8ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:38:20,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-09 17:38:20,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 196. [2021-07-09 17:38:20,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.174358974358974) internal successors, (424), 195 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:20,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 424 transitions. [2021-07-09 17:38:20,317 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 424 transitions. Word has length 20 [2021-07-09 17:38:20,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:20,317 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 424 transitions. [2021-07-09 17:38:20,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:20,317 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 424 transitions. [2021-07-09 17:38:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:20,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:20,317 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:20,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3369 [2021-07-09 17:38:20,518 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:20,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:20,518 INFO L82 PathProgramCache]: Analyzing trace with hash -491430942, now seen corresponding path program 652 times [2021-07-09 17:38:20,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:20,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950830343] [2021-07-09 17:38:20,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:20,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:20,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:20,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950830343] [2021-07-09 17:38:20,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950830343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:20,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69778335] [2021-07-09 17:38:20,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:20,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:20,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:20,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:20,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:20,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:20,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:20,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:20,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:20,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:20,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:20,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:20,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:20,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:20,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:20,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:20,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:20,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:20,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:20,914 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:20,968 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-07-09 17:38:20,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:20,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:20,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:20,972 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:20,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:20,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:20,975 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:20,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:20,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:20,998 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:38:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:21,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69778335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:21,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:21,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:21,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014759737] [2021-07-09 17:38:21,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:21,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:21,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:21,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:21,078 INFO L87 Difference]: Start difference. First operand 196 states and 424 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:21,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:21,553 INFO L93 Difference]: Finished difference Result 249 states and 519 transitions. [2021-07-09 17:38:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:38:21,553 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:21,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:21,553 INFO L225 Difference]: With dead ends: 249 [2021-07-09 17:38:21,553 INFO L226 Difference]: Without dead ends: 230 [2021-07-09 17:38:21,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 609.3ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:38:21,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-09 17:38:21,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 196. [2021-07-09 17:38:21,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.174358974358974) internal successors, (424), 195 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:21,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 424 transitions. [2021-07-09 17:38:21,555 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 424 transitions. Word has length 20 [2021-07-09 17:38:21,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:21,555 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 424 transitions. [2021-07-09 17:38:21,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:21,556 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 424 transitions. [2021-07-09 17:38:21,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:21,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:21,556 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:21,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3374,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:21,756 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:21,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:21,756 INFO L82 PathProgramCache]: Analyzing trace with hash 73390698, now seen corresponding path program 653 times [2021-07-09 17:38:21,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:21,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648159483] [2021-07-09 17:38:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:21,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:21,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648159483] [2021-07-09 17:38:21,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648159483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:21,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245132553] [2021-07-09 17:38:21,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:21,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:38:21,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:21,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:21,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:22,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:22,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:22,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,203 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-07-09 17:38:22,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:22,206 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:22,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:22,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,214 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:38:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:22,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245132553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:22,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:22,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:22,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174178859] [2021-07-09 17:38:22,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:22,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:22,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:22,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:22,254 INFO L87 Difference]: Start difference. First operand 196 states and 424 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:22,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:22,684 INFO L93 Difference]: Finished difference Result 227 states and 481 transitions. [2021-07-09 17:38:22,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:38:22,684 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:22,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:22,685 INFO L225 Difference]: With dead ends: 227 [2021-07-09 17:38:22,685 INFO L226 Difference]: Without dead ends: 211 [2021-07-09 17:38:22,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 563.9ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:38:22,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-09 17:38:22,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 198. [2021-07-09 17:38:22,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1725888324873095) internal successors, (428), 197 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:22,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 428 transitions. [2021-07-09 17:38:22,687 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 428 transitions. Word has length 20 [2021-07-09 17:38:22,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:22,687 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 428 transitions. [2021-07-09 17:38:22,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:22,687 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 428 transitions. [2021-07-09 17:38:22,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:22,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:22,687 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:22,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3377,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:22,887 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:22,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:22,888 INFO L82 PathProgramCache]: Analyzing trace with hash 935395762, now seen corresponding path program 654 times [2021-07-09 17:38:22,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:22,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404272569] [2021-07-09 17:38:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:23,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:23,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404272569] [2021-07-09 17:38:23,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404272569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:23,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560618271] [2021-07-09 17:38:23,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:23,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:38:23,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:23,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:38:23,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:23,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:23,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:23,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:23,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:23,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:23,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:23,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:23,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:23,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:23,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:23,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:23,309 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:23,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:23,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:23,313 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:23,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:23,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:23,333 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:29 [2021-07-09 17:38:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:23,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560618271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:23,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:23,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:23,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365836862] [2021-07-09 17:38:23,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:23,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:23,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:23,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:23,389 INFO L87 Difference]: Start difference. First operand 198 states and 428 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:23,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:23,913 INFO L93 Difference]: Finished difference Result 221 states and 469 transitions. [2021-07-09 17:38:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:38:23,914 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:23,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:23,914 INFO L225 Difference]: With dead ends: 221 [2021-07-09 17:38:23,914 INFO L226 Difference]: Without dead ends: 208 [2021-07-09 17:38:23,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 588.9ms TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:38:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-09 17:38:23,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 199. [2021-07-09 17:38:23,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.1717171717171717) internal successors, (430), 198 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:23,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 430 transitions. [2021-07-09 17:38:23,916 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 430 transitions. Word has length 20 [2021-07-09 17:38:23,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:23,916 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 430 transitions. [2021-07-09 17:38:23,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:23,916 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 430 transitions. [2021-07-09 17:38:23,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:23,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:23,917 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:24,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3381,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:24,132 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:24,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:24,132 INFO L82 PathProgramCache]: Analyzing trace with hash 2071581034, now seen corresponding path program 655 times [2021-07-09 17:38:24,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:24,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704266012] [2021-07-09 17:38:24,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:24,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:24,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704266012] [2021-07-09 17:38:24,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704266012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:24,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152748533] [2021-07-09 17:38:24,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:24,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:24,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:24,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:24,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:24,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:24,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:24,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:24,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:24,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:24,633 INFO L628 ElimStorePlain]: treesize reduction 94, result has 42.3 percent of original size [2021-07-09 17:38:24,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:38:24,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:24,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:24,657 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:38:24,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:24,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:24,661 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:24,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:24,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:24,682 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:173, output treesize:36 [2021-07-09 17:38:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:24,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152748533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:24,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:24,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:24,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647653684] [2021-07-09 17:38:24,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:24,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:24,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:24,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:24,765 INFO L87 Difference]: Start difference. First operand 199 states and 430 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:25,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:25,316 INFO L93 Difference]: Finished difference Result 243 states and 502 transitions. [2021-07-09 17:38:25,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:38:25,316 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:25,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:25,316 INFO L225 Difference]: With dead ends: 243 [2021-07-09 17:38:25,316 INFO L226 Difference]: Without dead ends: 224 [2021-07-09 17:38:25,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 744.7ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:38:25,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-09 17:38:25,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 197. [2021-07-09 17:38:25,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.173469387755102) internal successors, (426), 196 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:25,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 426 transitions. [2021-07-09 17:38:25,318 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 426 transitions. Word has length 20 [2021-07-09 17:38:25,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:25,319 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 426 transitions. [2021-07-09 17:38:25,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:25,319 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 426 transitions. [2021-07-09 17:38:25,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:25,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:25,319 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:25,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,656 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:25,519 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:25,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:25,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1171388358, now seen corresponding path program 656 times [2021-07-09 17:38:25,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:25,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965784063] [2021-07-09 17:38:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:25,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:25,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965784063] [2021-07-09 17:38:25,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965784063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:25,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462250278] [2021-07-09 17:38:25,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:25,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:25,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:25,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:38:25,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:25,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:25,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:25,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:25,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:25,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:25,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:25,904 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:25,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:25,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:25,910 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 17:38:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:25,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462250278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:25,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:25,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:25,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317982195] [2021-07-09 17:38:25,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:25,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:25,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:25,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:25,949 INFO L87 Difference]: Start difference. First operand 197 states and 426 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:26,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:26,306 INFO L93 Difference]: Finished difference Result 221 states and 472 transitions. [2021-07-09 17:38:26,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:38:26,306 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:26,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:26,307 INFO L225 Difference]: With dead ends: 221 [2021-07-09 17:38:26,307 INFO L226 Difference]: Without dead ends: 214 [2021-07-09 17:38:26,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 510.3ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:38:26,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-07-09 17:38:26,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 199. [2021-07-09 17:38:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.176767676767677) internal successors, (431), 198 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:26,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 431 transitions. [2021-07-09 17:38:26,309 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 431 transitions. Word has length 20 [2021-07-09 17:38:26,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:26,309 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 431 transitions. [2021-07-09 17:38:26,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:26,309 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 431 transitions. [2021-07-09 17:38:26,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:26,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:26,309 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:26,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3392 [2021-07-09 17:38:26,509 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:26,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:26,510 INFO L82 PathProgramCache]: Analyzing trace with hash -35203086, now seen corresponding path program 657 times [2021-07-09 17:38:26,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:26,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166581980] [2021-07-09 17:38:26,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:26,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:26,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166581980] [2021-07-09 17:38:26,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166581980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:26,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269396798] [2021-07-09 17:38:26,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:26,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:38:26,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:26,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:38:26,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:26,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:26,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:26,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:26,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:26,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:26,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:26,895 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:26,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:26,898 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:26,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:26,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:26,918 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:38:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:27,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269396798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:27,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:27,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:27,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311289208] [2021-07-09 17:38:27,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:27,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:27,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:27,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:27,006 INFO L87 Difference]: Start difference. First operand 199 states and 431 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:27,592 INFO L93 Difference]: Finished difference Result 225 states and 479 transitions. [2021-07-09 17:38:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:38:27,592 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:27,592 INFO L225 Difference]: With dead ends: 225 [2021-07-09 17:38:27,592 INFO L226 Difference]: Without dead ends: 218 [2021-07-09 17:38:27,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 724.2ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:38:27,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-07-09 17:38:27,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 199. [2021-07-09 17:38:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.176767676767677) internal successors, (431), 198 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:27,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 431 transitions. [2021-07-09 17:38:27,594 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 431 transitions. Word has length 20 [2021-07-09 17:38:27,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:27,594 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 431 transitions. [2021-07-09 17:38:27,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:27,594 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 431 transitions. [2021-07-09 17:38:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:27,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:27,595 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:27,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3396 [2021-07-09 17:38:27,795 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:27,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:27,795 INFO L82 PathProgramCache]: Analyzing trace with hash 2113593450, now seen corresponding path program 658 times [2021-07-09 17:38:27,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:27,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064162411] [2021-07-09 17:38:27,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:28,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:28,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064162411] [2021-07-09 17:38:28,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064162411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:28,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959369361] [2021-07-09 17:38:28,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:28,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:28,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:28,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:28,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:28,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:28,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:28,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:28,169 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:28,172 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,223 INFO L628 ElimStorePlain]: treesize reduction 83, result has 43.5 percent of original size [2021-07-09 17:38:28,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:28,227 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:28,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:28,234 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:28,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:28,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:28,256 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:38:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:28,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959369361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:28,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:28,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:28,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602019554] [2021-07-09 17:38:28,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:28,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:28,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:28,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:28,342 INFO L87 Difference]: Start difference. First operand 199 states and 431 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:28,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:28,827 INFO L93 Difference]: Finished difference Result 253 states and 528 transitions. [2021-07-09 17:38:28,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:38:28,827 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:28,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:28,827 INFO L225 Difference]: With dead ends: 253 [2021-07-09 17:38:28,827 INFO L226 Difference]: Without dead ends: 234 [2021-07-09 17:38:28,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 624.0ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:38:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-09 17:38:28,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 199. [2021-07-09 17:38:28,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.176767676767677) internal successors, (431), 198 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:28,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 431 transitions. [2021-07-09 17:38:28,829 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 431 transitions. Word has length 20 [2021-07-09 17:38:28,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:28,829 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 431 transitions. [2021-07-09 17:38:28,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:28,830 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 431 transitions. [2021-07-09 17:38:28,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:28,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:28,830 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:29,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3401,659 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:29,030 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:29,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:29,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1312724630, now seen corresponding path program 659 times [2021-07-09 17:38:29,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:29,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105938586] [2021-07-09 17:38:29,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:29,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:29,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105938586] [2021-07-09 17:38:29,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105938586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:29,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731435820] [2021-07-09 17:38:29,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:29,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:38:29,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:29,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:29,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:29,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:29,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:29,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:29,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:29,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:29,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:29,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:29,465 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-07-09 17:38:29,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:29,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:29,468 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:29,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:29,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:29,475 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-07-09 17:38:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:29,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731435820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:29,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:29,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:38:29,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618271217] [2021-07-09 17:38:29,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:38:29,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:29,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:38:29,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:29,513 INFO L87 Difference]: Start difference. First operand 199 states and 431 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:29,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:29,725 INFO L93 Difference]: Finished difference Result 220 states and 464 transitions. [2021-07-09 17:38:29,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:29,725 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:29,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:29,726 INFO L225 Difference]: With dead ends: 220 [2021-07-09 17:38:29,726 INFO L226 Difference]: Without dead ends: 204 [2021-07-09 17:38:29,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 373.5ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:29,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-07-09 17:38:29,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2021-07-09 17:38:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.174129353233831) internal successors, (437), 201 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:29,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 437 transitions. [2021-07-09 17:38:29,728 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 437 transitions. Word has length 20 [2021-07-09 17:38:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:29,728 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 437 transitions. [2021-07-09 17:38:29,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 437 transitions. [2021-07-09 17:38:29,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:29,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:29,728 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:29,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 660 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3404 [2021-07-09 17:38:29,928 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:29,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:29,929 INFO L82 PathProgramCache]: Analyzing trace with hash -450719566, now seen corresponding path program 660 times [2021-07-09 17:38:29,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:29,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788490207] [2021-07-09 17:38:29,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:30,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:30,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788490207] [2021-07-09 17:38:30,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788490207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:30,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174310850] [2021-07-09 17:38:30,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:30,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:38:30,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:30,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:38:30,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:30,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:30,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:30,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:30,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:30,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:30,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:30,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:30,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:30,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:30,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:30,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:30,351 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:30,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:30,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:30,354 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:30,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:30,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:30,371 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:29 [2021-07-09 17:38:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:30,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174310850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:30,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:30,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:30,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530482670] [2021-07-09 17:38:30,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:30,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:30,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:30,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:30,428 INFO L87 Difference]: Start difference. First operand 202 states and 437 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:30,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:30,885 INFO L93 Difference]: Finished difference Result 221 states and 470 transitions. [2021-07-09 17:38:30,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:38:30,886 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:30,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:30,886 INFO L225 Difference]: With dead ends: 221 [2021-07-09 17:38:30,886 INFO L226 Difference]: Without dead ends: 208 [2021-07-09 17:38:30,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 544.3ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:38:30,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-09 17:38:30,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 203. [2021-07-09 17:38:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.1732673267326734) internal successors, (439), 202 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:30,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 439 transitions. [2021-07-09 17:38:30,888 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 439 transitions. Word has length 20 [2021-07-09 17:38:30,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:30,888 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 439 transitions. [2021-07-09 17:38:30,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:30,888 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 439 transitions. [2021-07-09 17:38:30,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:30,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:30,888 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:31,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3408,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:31,089 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:31,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:31,089 INFO L82 PathProgramCache]: Analyzing trace with hash 685465706, now seen corresponding path program 661 times [2021-07-09 17:38:31,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:31,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199169255] [2021-07-09 17:38:31,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:31,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:31,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199169255] [2021-07-09 17:38:31,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199169255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:31,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817188712] [2021-07-09 17:38:31,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:31,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:31,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:31,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:31,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:31,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:31,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:31,533 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:38:31,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:31,537 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:31,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:31,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:31,566 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:31,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:31,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:31,590 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:31,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:31,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:31,610 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:38:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:31,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817188712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:31,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:31,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:38:31,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418363148] [2021-07-09 17:38:31,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:38:31,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:31,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:38:31,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:31,686 INFO L87 Difference]: Start difference. First operand 203 states and 439 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:32,003 INFO L93 Difference]: Finished difference Result 221 states and 468 transitions. [2021-07-09 17:38:32,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:38:32,004 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:32,004 INFO L225 Difference]: With dead ends: 221 [2021-07-09 17:38:32,004 INFO L226 Difference]: Without dead ends: 209 [2021-07-09 17:38:32,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 439.1ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:38:32,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-07-09 17:38:32,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 201. [2021-07-09 17:38:32,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.175) internal successors, (435), 200 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:32,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 435 transitions. [2021-07-09 17:38:32,006 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 435 transitions. Word has length 20 [2021-07-09 17:38:32,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:32,006 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 435 transitions. [2021-07-09 17:38:32,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:32,006 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 435 transitions. [2021-07-09 17:38:32,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:32,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:32,006 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:32,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3414,662 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:32,207 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:32,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:32,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1737463610, now seen corresponding path program 662 times [2021-07-09 17:38:32,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:32,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830116887] [2021-07-09 17:38:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:32,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:32,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830116887] [2021-07-09 17:38:32,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830116887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:32,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413402375] [2021-07-09 17:38:32,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:32,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:32,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:32,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:38:32,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:32,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:32,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:32,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:32,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:32,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:32,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:38:32,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:32,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:32,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:32,621 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 17:38:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:32,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413402375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:32,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:32,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:32,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785655876] [2021-07-09 17:38:32,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:32,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:32,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:32,660 INFO L87 Difference]: Start difference. First operand 201 states and 435 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:33,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:33,083 INFO L93 Difference]: Finished difference Result 223 states and 477 transitions. [2021-07-09 17:38:33,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:38:33,084 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:33,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:33,084 INFO L225 Difference]: With dead ends: 223 [2021-07-09 17:38:33,084 INFO L226 Difference]: Without dead ends: 216 [2021-07-09 17:38:33,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 470.6ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:38:33,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-09 17:38:33,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 203. [2021-07-09 17:38:33,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.1782178217821784) internal successors, (440), 202 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:33,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 440 transitions. [2021-07-09 17:38:33,086 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 440 transitions. Word has length 20 [2021-07-09 17:38:33,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:33,086 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 440 transitions. [2021-07-09 17:38:33,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:33,086 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 440 transitions. [2021-07-09 17:38:33,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:33,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:33,087 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:33,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3419,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:33,287 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:33,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:33,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1421318414, now seen corresponding path program 663 times [2021-07-09 17:38:33,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:33,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440254623] [2021-07-09 17:38:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:33,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:33,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440254623] [2021-07-09 17:38:33,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440254623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:33,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354261007] [2021-07-09 17:38:33,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:33,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:38:33,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:33,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:33,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:33,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:33,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:33,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,761 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:38:33,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:33,765 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:33,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:33,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:33,791 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:33,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:33,815 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:33,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:33,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:33,835 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:38:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:33,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354261007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:33,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:33,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:38:33,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867692325] [2021-07-09 17:38:33,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:38:33,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:33,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:38:33,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:33,911 INFO L87 Difference]: Start difference. First operand 203 states and 440 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:34,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:34,349 INFO L93 Difference]: Finished difference Result 249 states and 514 transitions. [2021-07-09 17:38:34,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:38:34,350 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:34,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:34,350 INFO L225 Difference]: With dead ends: 249 [2021-07-09 17:38:34,350 INFO L226 Difference]: Without dead ends: 230 [2021-07-09 17:38:34,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 605.7ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:38:34,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-09 17:38:34,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 202. [2021-07-09 17:38:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.174129353233831) internal successors, (437), 201 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:34,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 437 transitions. [2021-07-09 17:38:34,352 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 437 transitions. Word has length 20 [2021-07-09 17:38:34,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:34,352 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 437 transitions. [2021-07-09 17:38:34,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:34,352 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 437 transitions. [2021-07-09 17:38:34,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:34,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:34,353 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:34,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3422 [2021-07-09 17:38:34,553 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:34,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:34,553 INFO L82 PathProgramCache]: Analyzing trace with hash 727478122, now seen corresponding path program 664 times [2021-07-09 17:38:34,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:34,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299871980] [2021-07-09 17:38:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:34,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:34,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299871980] [2021-07-09 17:38:34,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299871980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:34,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981183986] [2021-07-09 17:38:34,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:34,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:34,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:34,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:34,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:34,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:34,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:34,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:34,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:34,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:34,925 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:34,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:34,928 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:34,979 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-07-09 17:38:34,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:34,986 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:34,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:34,989 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:35,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:35,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:35,012 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:38:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:35,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981183986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:35,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:35,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:35,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382521769] [2021-07-09 17:38:35,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:35,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:35,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:35,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:35,092 INFO L87 Difference]: Start difference. First operand 202 states and 437 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:35,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:35,614 INFO L93 Difference]: Finished difference Result 256 states and 534 transitions. [2021-07-09 17:38:35,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:38:35,614 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:35,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:35,615 INFO L225 Difference]: With dead ends: 256 [2021-07-09 17:38:35,615 INFO L226 Difference]: Without dead ends: 237 [2021-07-09 17:38:35,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 591.1ms TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:38:35,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-09 17:38:35,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 202. [2021-07-09 17:38:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.174129353233831) internal successors, (437), 201 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:35,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 437 transitions. [2021-07-09 17:38:35,617 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 437 transitions. Word has length 20 [2021-07-09 17:38:35,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:35,617 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 437 transitions. [2021-07-09 17:38:35,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:35,617 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 437 transitions. [2021-07-09 17:38:35,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:35,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:35,617 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:35,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3427,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:35,818 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:35,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:35,818 INFO L82 PathProgramCache]: Analyzing trace with hash 851665330, now seen corresponding path program 665 times [2021-07-09 17:38:35,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:35,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560105293] [2021-07-09 17:38:35,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:35,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:35,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560105293] [2021-07-09 17:38:35,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560105293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:35,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296967617] [2021-07-09 17:38:35,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:36,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:38:36,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:36,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:36,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:36,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:36,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:36,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:36,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:36,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:36,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:36,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:36,216 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-07-09 17:38:36,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:36,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:36,219 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:36,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:36,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:36,226 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:38:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:36,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296967617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:36,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:36,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:38:36,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084725177] [2021-07-09 17:38:36,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:38:36,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:36,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:38:36,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:36,261 INFO L87 Difference]: Start difference. First operand 202 states and 437 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:36,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:36,491 INFO L93 Difference]: Finished difference Result 226 states and 480 transitions. [2021-07-09 17:38:36,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:38:36,491 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:36,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:36,492 INFO L225 Difference]: With dead ends: 226 [2021-07-09 17:38:36,492 INFO L226 Difference]: Without dead ends: 213 [2021-07-09 17:38:36,492 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 365.1ms TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:38:36,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-09 17:38:36,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2021-07-09 17:38:36,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.1715686274509802) internal successors, (443), 204 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:36,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 443 transitions. [2021-07-09 17:38:36,494 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 443 transitions. Word has length 20 [2021-07-09 17:38:36,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:36,494 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 443 transitions. [2021-07-09 17:38:36,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:36,494 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 443 transitions. [2021-07-09 17:38:36,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:36,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:36,494 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:36,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3430 [2021-07-09 17:38:36,694 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:36,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:36,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1987850602, now seen corresponding path program 666 times [2021-07-09 17:38:36,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:36,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142066084] [2021-07-09 17:38:36,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:36,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:36,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142066084] [2021-07-09 17:38:36,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142066084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:36,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585231384] [2021-07-09 17:38:36,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:36,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:38:36,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:36,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:38:36,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:37,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:37,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:37,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:37,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:37,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:37,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:37,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:37,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:37,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:37,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:37,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:37,038 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:37,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:37,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:37,042 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:37,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:37,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:37,062 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:38:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:37,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585231384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:37,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:37,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:38:37,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332114493] [2021-07-09 17:38:37,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:38:37,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:37,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:38:37,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:37,158 INFO L87 Difference]: Start difference. First operand 205 states and 443 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:37,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:37,496 INFO L93 Difference]: Finished difference Result 225 states and 478 transitions. [2021-07-09 17:38:37,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:38:37,496 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:37,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:37,496 INFO L225 Difference]: With dead ends: 225 [2021-07-09 17:38:37,496 INFO L226 Difference]: Without dead ends: 215 [2021-07-09 17:38:37,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 421.6ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:38:37,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-07-09 17:38:37,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 206. [2021-07-09 17:38:37,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.175609756097561) internal successors, (446), 205 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:37,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 446 transitions. [2021-07-09 17:38:37,498 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 446 transitions. Word has length 20 [2021-07-09 17:38:37,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:37,498 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 446 transitions. [2021-07-09 17:38:37,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:37,499 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 446 transitions. [2021-07-09 17:38:37,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:37,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:37,499 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:37,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3433,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:37,699 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:37,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:37,699 INFO L82 PathProgramCache]: Analyzing trace with hash -158320158, now seen corresponding path program 667 times [2021-07-09 17:38:37,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:37,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779278366] [2021-07-09 17:38:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:37,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:37,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779278366] [2021-07-09 17:38:37,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779278366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:37,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541008308] [2021-07-09 17:38:37,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:37,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:37,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:38,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:38,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:38,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:38,053 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:38,056 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,107 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-07-09 17:38:38,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:38,111 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:38,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:38,115 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:38,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:38,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:38,137 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:38:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:38,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541008308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:38,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:38,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:38:38,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286224541] [2021-07-09 17:38:38,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:38:38,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:38,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:38:38,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:38,217 INFO L87 Difference]: Start difference. First operand 206 states and 446 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:38,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:38,709 INFO L93 Difference]: Finished difference Result 257 states and 537 transitions. [2021-07-09 17:38:38,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:38:38,709 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:38,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:38,709 INFO L225 Difference]: With dead ends: 257 [2021-07-09 17:38:38,709 INFO L226 Difference]: Without dead ends: 238 [2021-07-09 17:38:38,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 628.7ms TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:38:38,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-09 17:38:38,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 206. [2021-07-09 17:38:38,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.175609756097561) internal successors, (446), 205 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:38,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 446 transitions. [2021-07-09 17:38:38,711 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 446 transitions. Word has length 20 [2021-07-09 17:38:38,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:38,711 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 446 transitions. [2021-07-09 17:38:38,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:38,711 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 446 transitions. [2021-07-09 17:38:38,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:38,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:38,712 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:38,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3438,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:38,912 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:38,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:38,912 INFO L82 PathProgramCache]: Analyzing trace with hash 2029863018, now seen corresponding path program 668 times [2021-07-09 17:38:38,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:38,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179480285] [2021-07-09 17:38:38,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:39,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:39,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179480285] [2021-07-09 17:38:39,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179480285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:39,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420532592] [2021-07-09 17:38:39,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:39,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:39,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:39,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:38:39,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:39,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:39,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:39,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:39,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:39,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:39,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:39,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:39,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:39,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:39,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:39,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:39,319 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:39,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:39,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:39,322 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:39,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:39,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:39,342 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:38:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:39,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420532592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:39,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:39,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:39,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953188344] [2021-07-09 17:38:39,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:39,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:39,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:39,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:39,420 INFO L87 Difference]: Start difference. First operand 206 states and 446 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:40,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:40,145 INFO L93 Difference]: Finished difference Result 239 states and 513 transitions. [2021-07-09 17:38:40,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:38:40,146 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:40,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:40,146 INFO L225 Difference]: With dead ends: 239 [2021-07-09 17:38:40,146 INFO L226 Difference]: Without dead ends: 230 [2021-07-09 17:38:40,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 841.3ms TimeCoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:38:40,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-09 17:38:40,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 208. [2021-07-09 17:38:40,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.183574879227053) internal successors, (452), 207 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:40,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 452 transitions. [2021-07-09 17:38:40,148 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 452 transitions. Word has length 20 [2021-07-09 17:38:40,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:40,148 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 452 transitions. [2021-07-09 17:38:40,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:40,148 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 452 transitions. [2021-07-09 17:38:40,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:40,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:40,149 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:40,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3441 [2021-07-09 17:38:40,361 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:40,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:40,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1686900046, now seen corresponding path program 669 times [2021-07-09 17:38:40,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:40,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402775292] [2021-07-09 17:38:40,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:40,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:40,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402775292] [2021-07-09 17:38:40,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402775292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:40,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567505778] [2021-07-09 17:38:40,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:40,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:38:40,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:40,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:40,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:40,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:40,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:40,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:40,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:40,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:40,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:40,802 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:40,822 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-07-09 17:38:40,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:40,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:40,825 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:40,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:40,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:40,831 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-07-09 17:38:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:40,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567505778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:40,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:40,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:38:40,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480683055] [2021-07-09 17:38:40,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:38:40,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:40,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:38:40,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:40,867 INFO L87 Difference]: Start difference. First operand 208 states and 452 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:41,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:41,153 INFO L93 Difference]: Finished difference Result 231 states and 493 transitions. [2021-07-09 17:38:41,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:38:41,153 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:41,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:41,153 INFO L225 Difference]: With dead ends: 231 [2021-07-09 17:38:41,153 INFO L226 Difference]: Without dead ends: 218 [2021-07-09 17:38:41,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 397.1ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:38:41,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-07-09 17:38:41,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 213. [2021-07-09 17:38:41,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.1792452830188678) internal successors, (462), 212 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:41,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 462 transitions. [2021-07-09 17:38:41,155 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 462 transitions. Word has length 20 [2021-07-09 17:38:41,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:41,155 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 462 transitions. [2021-07-09 17:38:41,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:41,155 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 462 transitions. [2021-07-09 17:38:41,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:41,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:41,156 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:41,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3444,670 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:41,356 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:41,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:41,356 INFO L82 PathProgramCache]: Analyzing trace with hash -550714774, now seen corresponding path program 670 times [2021-07-09 17:38:41,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:41,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140459197] [2021-07-09 17:38:41,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:41,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:41,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140459197] [2021-07-09 17:38:41,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140459197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:41,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438898488] [2021-07-09 17:38:41,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:41,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:41,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:41,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:41,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:41,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:41,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:41,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:41,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:41,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:41,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:41,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:41,812 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-07-09 17:38:41,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:41,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:41,816 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:41,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:41,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:41,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:41,842 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:41,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:41,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:41,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:41,866 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:41,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:41,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:41,887 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:38:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:41,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438898488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:41,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:41,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:41,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841820618] [2021-07-09 17:38:41,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:41,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:41,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:41,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:41,965 INFO L87 Difference]: Start difference. First operand 213 states and 462 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:42,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:42,383 INFO L93 Difference]: Finished difference Result 251 states and 522 transitions. [2021-07-09 17:38:42,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:38:42,383 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:42,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:42,384 INFO L225 Difference]: With dead ends: 251 [2021-07-09 17:38:42,384 INFO L226 Difference]: Without dead ends: 232 [2021-07-09 17:38:42,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 530.4ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:38:42,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-07-09 17:38:42,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 212. [2021-07-09 17:38:42,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.1800947867298577) internal successors, (460), 211 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:42,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 460 transitions. [2021-07-09 17:38:42,386 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 460 transitions. Word has length 20 [2021-07-09 17:38:42,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:42,386 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 460 transitions. [2021-07-09 17:38:42,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:42,386 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 460 transitions. [2021-07-09 17:38:42,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:42,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:42,386 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:42,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3447,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:42,586 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:42,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:42,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1598081762, now seen corresponding path program 671 times [2021-07-09 17:38:42,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:42,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008234758] [2021-07-09 17:38:42,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:42,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:42,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008234758] [2021-07-09 17:38:42,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008234758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:42,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504098749] [2021-07-09 17:38:42,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:42,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:38:42,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:42,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:42,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:42,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:42,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:42,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:42,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:42,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:42,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:42,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:42,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:42,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:42,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:42,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:42,965 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:42,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:42,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:42,968 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:43,018 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-07-09 17:38:43,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:43,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:43,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:43,021 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:43,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:43,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:43,025 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:43,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:43,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:43,047 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:38:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:43,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504098749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:43,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:43,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:43,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439464709] [2021-07-09 17:38:43,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:43,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:43,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:43,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:43,129 INFO L87 Difference]: Start difference. First operand 212 states and 460 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:43,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:43,662 INFO L93 Difference]: Finished difference Result 261 states and 547 transitions. [2021-07-09 17:38:43,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:38:43,662 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:43,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:43,663 INFO L225 Difference]: With dead ends: 261 [2021-07-09 17:38:43,663 INFO L226 Difference]: Without dead ends: 242 [2021-07-09 17:38:43,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 632.3ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:38:43,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-07-09 17:38:43,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 211. [2021-07-09 17:38:43,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.1809523809523808) internal successors, (458), 210 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:43,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 458 transitions. [2021-07-09 17:38:43,665 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 458 transitions. Word has length 20 [2021-07-09 17:38:43,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:43,665 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 458 transitions. [2021-07-09 17:38:43,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:43,665 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 458 transitions. [2021-07-09 17:38:43,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:43,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:43,665 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:43,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 672 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3452 [2021-07-09 17:38:43,881 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:43,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:43,881 INFO L82 PathProgramCache]: Analyzing trace with hash -508702358, now seen corresponding path program 672 times [2021-07-09 17:38:43,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:43,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496051235] [2021-07-09 17:38:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:44,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:44,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496051235] [2021-07-09 17:38:44,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496051235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:44,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536129171] [2021-07-09 17:38:44,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:44,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:38:44,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:44,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:44,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:44,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:44,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:44,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:44,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:44,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:44,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:44,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:44,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:44,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:44,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:44,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:44,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:44,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:44,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:44,242 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:44,294 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-07-09 17:38:44,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:44,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:44,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:44,298 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:44,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:44,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:44,302 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:44,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:44,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:44,324 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:38:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:44,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536129171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:44,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:44,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:38:44,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637182266] [2021-07-09 17:38:44,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:38:44,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:44,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:38:44,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:44,400 INFO L87 Difference]: Start difference. First operand 211 states and 458 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:44,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:44,752 INFO L93 Difference]: Finished difference Result 242 states and 518 transitions. [2021-07-09 17:38:44,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:38:44,752 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:44,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:44,752 INFO L225 Difference]: With dead ends: 242 [2021-07-09 17:38:44,752 INFO L226 Difference]: Without dead ends: 230 [2021-07-09 17:38:44,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:38:44,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-09 17:38:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 212. [2021-07-09 17:38:44,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.184834123222749) internal successors, (461), 211 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:44,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 461 transitions. [2021-07-09 17:38:44,754 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 461 transitions. Word has length 20 [2021-07-09 17:38:44,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:44,754 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 461 transitions. [2021-07-09 17:38:44,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:44,754 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 461 transitions. [2021-07-09 17:38:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:44,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:44,755 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:44,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3455,673 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:44,955 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:44,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:44,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1394500638, now seen corresponding path program 673 times [2021-07-09 17:38:44,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:44,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900156625] [2021-07-09 17:38:44,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:45,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:45,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900156625] [2021-07-09 17:38:45,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900156625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:45,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546582131] [2021-07-09 17:38:45,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:45,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:45,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:45,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:45,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:45,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:45,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:45,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:45,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:45,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:45,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:45,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:45,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:45,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:45,380 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:45,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:45,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:45,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:45,435 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-07-09 17:38:45,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:45,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:45,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:45,438 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:45,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:45,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:45,442 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:45,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:45,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:45,464 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:38:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:45,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546582131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:45,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:45,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:45,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377583124] [2021-07-09 17:38:45,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:45,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:45,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:45,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:45,546 INFO L87 Difference]: Start difference. First operand 212 states and 461 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:46,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:46,573 INFO L93 Difference]: Finished difference Result 329 states and 666 transitions. [2021-07-09 17:38:46,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:38:46,574 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:46,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:46,574 INFO L225 Difference]: With dead ends: 329 [2021-07-09 17:38:46,574 INFO L226 Difference]: Without dead ends: 289 [2021-07-09 17:38:46,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1106.3ms TimeCoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:38:46,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-07-09 17:38:46,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 217. [2021-07-09 17:38:46,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.2037037037037037) internal successors, (476), 216 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 476 transitions. [2021-07-09 17:38:46,576 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 476 transitions. Word has length 20 [2021-07-09 17:38:46,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:46,576 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 476 transitions. [2021-07-09 17:38:46,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:46,577 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 476 transitions. [2021-07-09 17:38:46,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:46,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:46,577 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:46,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 674 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3458 [2021-07-09 17:38:46,789 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:46,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:46,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1210523754, now seen corresponding path program 674 times [2021-07-09 17:38:46,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:46,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534898124] [2021-07-09 17:38:46,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:47,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:47,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534898124] [2021-07-09 17:38:47,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534898124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:47,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888919284] [2021-07-09 17:38:47,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:47,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:47,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:47,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:38:47,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:47,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:47,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:47,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:47,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:47,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:47,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:47,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:47,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:47,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:47,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:47,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:47,218 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:47,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:47,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:47,221 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:47,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:47,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:47,242 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:38:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:47,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888919284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:47,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:47,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:38:47,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703772260] [2021-07-09 17:38:47,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:38:47,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:47,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:38:47,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:47,322 INFO L87 Difference]: Start difference. First operand 217 states and 476 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:47,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:47,960 INFO L93 Difference]: Finished difference Result 252 states and 547 transitions. [2021-07-09 17:38:47,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:38:47,960 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:47,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:47,960 INFO L225 Difference]: With dead ends: 252 [2021-07-09 17:38:47,961 INFO L226 Difference]: Without dead ends: 243 [2021-07-09 17:38:47,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 732.5ms TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:38:47,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-07-09 17:38:47,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2021-07-09 17:38:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2045454545454546) internal successors, (485), 220 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 485 transitions. [2021-07-09 17:38:47,963 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 485 transitions. Word has length 20 [2021-07-09 17:38:47,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:47,963 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 485 transitions. [2021-07-09 17:38:47,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:47,963 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 485 transitions. [2021-07-09 17:38:47,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:47,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:47,963 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:48,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 675 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3461 [2021-07-09 17:38:48,163 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:48,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:48,164 INFO L82 PathProgramCache]: Analyzing trace with hash -309493022, now seen corresponding path program 675 times [2021-07-09 17:38:48,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:48,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848043686] [2021-07-09 17:38:48,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:48,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:48,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848043686] [2021-07-09 17:38:48,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848043686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:48,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416760993] [2021-07-09 17:38:48,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:48,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:38:48,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:48,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:38:48,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:48,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:48,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:48,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:48,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:48,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:48,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:48,589 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:48,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:48,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:48,595 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:38:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:48,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416760993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:48,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:48,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:48,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031394828] [2021-07-09 17:38:48,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:48,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:48,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:48,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:48,637 INFO L87 Difference]: Start difference. First operand 221 states and 485 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:48,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:48,830 INFO L93 Difference]: Finished difference Result 247 states and 529 transitions. [2021-07-09 17:38:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:38:48,831 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:48,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:48,831 INFO L225 Difference]: With dead ends: 247 [2021-07-09 17:38:48,831 INFO L226 Difference]: Without dead ends: 240 [2021-07-09 17:38:48,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 403.3ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:38:48,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-07-09 17:38:48,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 222. [2021-07-09 17:38:48,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.2081447963800906) internal successors, (488), 221 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 488 transitions. [2021-07-09 17:38:48,833 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 488 transitions. Word has length 20 [2021-07-09 17:38:48,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:48,833 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 488 transitions. [2021-07-09 17:38:48,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 488 transitions. [2021-07-09 17:38:48,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:48,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:48,833 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:49,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3464,676 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:49,034 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:49,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:49,034 INFO L82 PathProgramCache]: Analyzing trace with hash -851314646, now seen corresponding path program 676 times [2021-07-09 17:38:49,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:49,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870102554] [2021-07-09 17:38:49,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:49,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:49,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870102554] [2021-07-09 17:38:49,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870102554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:49,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669763800] [2021-07-09 17:38:49,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:49,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:49,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:49,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:49,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:49,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:49,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:49,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:49,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:49,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:49,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:49,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:49,411 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:38:49,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:49,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:49,414 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:49,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:49,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:49,421 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:38:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:49,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669763800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:49,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:49,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:38:49,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637462716] [2021-07-09 17:38:49,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:38:49,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:49,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:38:49,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:49,458 INFO L87 Difference]: Start difference. First operand 222 states and 488 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:49,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:49,812 INFO L93 Difference]: Finished difference Result 268 states and 570 transitions. [2021-07-09 17:38:49,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:38:49,812 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:49,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:49,812 INFO L225 Difference]: With dead ends: 268 [2021-07-09 17:38:49,812 INFO L226 Difference]: Without dead ends: 249 [2021-07-09 17:38:49,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 418.6ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:38:49,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-09 17:38:49,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 223. [2021-07-09 17:38:49,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.2072072072072073) internal successors, (490), 222 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 490 transitions. [2021-07-09 17:38:49,815 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 490 transitions. Word has length 20 [2021-07-09 17:38:49,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:49,815 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 490 transitions. [2021-07-09 17:38:49,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 490 transitions. [2021-07-09 17:38:49,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:49,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:49,815 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:50,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3465,677 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:50,015 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:50,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:50,016 INFO L82 PathProgramCache]: Analyzing trace with hash 101038562, now seen corresponding path program 677 times [2021-07-09 17:38:50,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:50,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048669911] [2021-07-09 17:38:50,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:50,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:50,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048669911] [2021-07-09 17:38:50,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048669911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:50,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203689563] [2021-07-09 17:38:50,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:50,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:38:50,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:50,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:50,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:50,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:50,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:50,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:50,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:50,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:50,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:50,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:50,558 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:38:50,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:50,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:50,561 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:50,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:50,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:50,568 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:38:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:50,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203689563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:50,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:50,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:50,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515439134] [2021-07-09 17:38:50,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:50,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:50,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:50,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:50,614 INFO L87 Difference]: Start difference. First operand 223 states and 490 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:50,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:50,928 INFO L93 Difference]: Finished difference Result 253 states and 538 transitions. [2021-07-09 17:38:50,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:50,929 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:50,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:50,929 INFO L225 Difference]: With dead ends: 253 [2021-07-09 17:38:50,929 INFO L226 Difference]: Without dead ends: 237 [2021-07-09 17:38:50,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 568.2ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:38:50,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-09 17:38:50,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 224. [2021-07-09 17:38:50,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2062780269058297) internal successors, (492), 223 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:50,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 492 transitions. [2021-07-09 17:38:50,931 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 492 transitions. Word has length 20 [2021-07-09 17:38:50,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:50,931 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 492 transitions. [2021-07-09 17:38:50,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:50,931 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 492 transitions. [2021-07-09 17:38:50,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:50,931 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:50,931 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:51,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3466 [2021-07-09 17:38:51,132 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:51,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:51,132 INFO L82 PathProgramCache]: Analyzing trace with hash 963043626, now seen corresponding path program 678 times [2021-07-09 17:38:51,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:51,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737054828] [2021-07-09 17:38:51,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:51,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:51,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737054828] [2021-07-09 17:38:51,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737054828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:51,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549868854] [2021-07-09 17:38:51,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:51,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:38:51,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:51,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:38:51,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:51,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:51,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:51,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:51,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:51,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:51,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:38:51,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:51,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:51,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:51,517 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:38:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:51,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549868854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:51,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:51,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:38:51,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647912281] [2021-07-09 17:38:51,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:38:51,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:51,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:38:51,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:51,553 INFO L87 Difference]: Start difference. First operand 224 states and 492 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:51,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:51,886 INFO L93 Difference]: Finished difference Result 262 states and 561 transitions. [2021-07-09 17:38:51,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:38:51,887 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:51,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:51,887 INFO L225 Difference]: With dead ends: 262 [2021-07-09 17:38:51,887 INFO L226 Difference]: Without dead ends: 255 [2021-07-09 17:38:51,887 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 434.3ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:38:51,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-09 17:38:51,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 225. [2021-07-09 17:38:51,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.2098214285714284) internal successors, (495), 224 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:51,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 495 transitions. [2021-07-09 17:38:51,889 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 495 transitions. Word has length 20 [2021-07-09 17:38:51,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:51,889 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 495 transitions. [2021-07-09 17:38:51,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:51,890 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 495 transitions. [2021-07-09 17:38:51,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:51,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:51,890 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:52,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3467,679 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:52,090 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:52,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:52,090 INFO L82 PathProgramCache]: Analyzing trace with hash 2099228898, now seen corresponding path program 679 times [2021-07-09 17:38:52,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:52,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757031236] [2021-07-09 17:38:52,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:52,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:52,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757031236] [2021-07-09 17:38:52,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757031236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:52,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413849732] [2021-07-09 17:38:52,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:52,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:52,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:52,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:52,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:52,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:52,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:52,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:52,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:52,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:52,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:52,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:52,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:52,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:52,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:52,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:52,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:52,599 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:52,651 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-07-09 17:38:52,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:52,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:52,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:52,655 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:52,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:52,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:38:52,658 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:52,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:52,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:52,681 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:38:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:52,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413849732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:52,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:52,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:52,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407140030] [2021-07-09 17:38:52,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:52,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:52,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:52,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:52,766 INFO L87 Difference]: Start difference. First operand 225 states and 495 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:53,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:53,247 INFO L93 Difference]: Finished difference Result 281 states and 586 transitions. [2021-07-09 17:38:53,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:38:53,248 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:53,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:53,248 INFO L225 Difference]: With dead ends: 281 [2021-07-09 17:38:53,248 INFO L226 Difference]: Without dead ends: 262 [2021-07-09 17:38:53,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 727.1ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:38:53,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-09 17:38:53,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 221. [2021-07-09 17:38:53,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2045454545454546) internal successors, (485), 220 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:53,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 485 transitions. [2021-07-09 17:38:53,250 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 485 transitions. Word has length 20 [2021-07-09 17:38:53,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:53,250 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 485 transitions. [2021-07-09 17:38:53,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:53,250 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 485 transitions. [2021-07-09 17:38:53,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:53,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:53,251 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:53,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3468,680 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:53,451 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:53,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:53,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1753709746, now seen corresponding path program 680 times [2021-07-09 17:38:53,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:53,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948584647] [2021-07-09 17:38:53,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:53,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:53,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948584647] [2021-07-09 17:38:53,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948584647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:53,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444858990] [2021-07-09 17:38:53,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:53,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:53,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:53,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:38:53,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:53,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:53,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:53,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:53,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:53,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:53,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:53,859 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:53,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:53,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:53,865 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:38:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:53,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444858990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:53,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:53,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:53,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490177075] [2021-07-09 17:38:53,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:53,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:53,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:53,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:53,906 INFO L87 Difference]: Start difference. First operand 221 states and 485 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:54,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:54,173 INFO L93 Difference]: Finished difference Result 245 states and 526 transitions. [2021-07-09 17:38:54,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:38:54,173 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:54,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:54,174 INFO L225 Difference]: With dead ends: 245 [2021-07-09 17:38:54,174 INFO L226 Difference]: Without dead ends: 238 [2021-07-09 17:38:54,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 418.6ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:38:54,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-09 17:38:54,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 223. [2021-07-09 17:38:54,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.2072072072072073) internal successors, (490), 222 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:54,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 490 transitions. [2021-07-09 17:38:54,176 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 490 transitions. Word has length 20 [2021-07-09 17:38:54,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:54,176 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 490 transitions. [2021-07-09 17:38:54,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:54,176 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 490 transitions. [2021-07-09 17:38:54,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:54,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:54,176 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:54,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3471,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:54,377 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:54,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:54,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1588904342, now seen corresponding path program 681 times [2021-07-09 17:38:54,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:54,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331788564] [2021-07-09 17:38:54,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:54,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:54,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331788564] [2021-07-09 17:38:54,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331788564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:54,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787655334] [2021-07-09 17:38:54,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:54,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:38:54,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:54,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:54,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:54,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:54,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:54,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:54,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:54,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:54,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:54,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:54,852 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:38:54,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:54,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:54,858 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:54,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:54,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:54,865 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:38:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:54,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787655334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:54,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:54,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:54,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714781266] [2021-07-09 17:38:54,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:54,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:54,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:54,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:54,907 INFO L87 Difference]: Start difference. First operand 223 states and 490 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:55,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:55,226 INFO L93 Difference]: Finished difference Result 249 states and 531 transitions. [2021-07-09 17:38:55,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:38:55,226 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:55,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:55,227 INFO L225 Difference]: With dead ends: 249 [2021-07-09 17:38:55,227 INFO L226 Difference]: Without dead ends: 233 [2021-07-09 17:38:55,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 533.1ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:38:55,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-07-09 17:38:55,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 224. [2021-07-09 17:38:55,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2062780269058297) internal successors, (492), 223 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:55,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 492 transitions. [2021-07-09 17:38:55,229 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 492 transitions. Word has length 20 [2021-07-09 17:38:55,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:55,229 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 492 transitions. [2021-07-09 17:38:55,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:55,229 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 492 transitions. [2021-07-09 17:38:55,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:55,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:55,229 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:55,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 682 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3472 [2021-07-09 17:38:55,430 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:55,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:55,430 INFO L82 PathProgramCache]: Analyzing trace with hash -726899278, now seen corresponding path program 682 times [2021-07-09 17:38:55,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:55,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120772000] [2021-07-09 17:38:55,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:55,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:55,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:55,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120772000] [2021-07-09 17:38:55,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120772000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:55,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270283888] [2021-07-09 17:38:55,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:55,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:55,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:55,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:55,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:55,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:55,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:55,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:55,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:55,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:55,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:55,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:55,849 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-07-09 17:38:55,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:55,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:38:55,852 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:55,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:55,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:55,858 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:38:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:55,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270283888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:55,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:55,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:55,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306109520] [2021-07-09 17:38:55,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:55,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:55,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:55,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:55,901 INFO L87 Difference]: Start difference. First operand 224 states and 492 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:56,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:56,327 INFO L93 Difference]: Finished difference Result 257 states and 549 transitions. [2021-07-09 17:38:56,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:56,327 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:56,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:56,327 INFO L225 Difference]: With dead ends: 257 [2021-07-09 17:38:56,327 INFO L226 Difference]: Without dead ends: 244 [2021-07-09 17:38:56,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 543.8ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:38:56,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-09 17:38:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 225. [2021-07-09 17:38:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.205357142857143) internal successors, (494), 224 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:56,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 494 transitions. [2021-07-09 17:38:56,329 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 494 transitions. Word has length 20 [2021-07-09 17:38:56,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:56,329 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 494 transitions. [2021-07-09 17:38:56,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 494 transitions. [2021-07-09 17:38:56,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:56,330 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:56,330 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:56,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 683 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3473 [2021-07-09 17:38:56,530 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:56,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:56,530 INFO L82 PathProgramCache]: Analyzing trace with hash 409285994, now seen corresponding path program 683 times [2021-07-09 17:38:56,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:56,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378649844] [2021-07-09 17:38:56,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:56,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:56,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378649844] [2021-07-09 17:38:56,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378649844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:56,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514793045] [2021-07-09 17:38:56,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:56,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:38:56,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:56,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:56,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:56,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:56,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:56,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:56,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:56,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:56,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:56,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:56,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:56,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:56,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:56,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:56,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:56,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:56,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:56,922 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:56,974 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-07-09 17:38:56,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:56,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:56,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:56,978 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:56,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:56,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:56,981 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:57,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:57,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:57,003 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:38:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:57,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514793045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:57,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:57,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:57,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325853140] [2021-07-09 17:38:57,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:57,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:57,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:57,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:57,082 INFO L87 Difference]: Start difference. First operand 225 states and 494 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:57,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:57,450 INFO L93 Difference]: Finished difference Result 277 states and 578 transitions. [2021-07-09 17:38:57,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:57,451 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:57,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:57,451 INFO L225 Difference]: With dead ends: 277 [2021-07-09 17:38:57,451 INFO L226 Difference]: Without dead ends: 258 [2021-07-09 17:38:57,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 530.4ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:38:57,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-07-09 17:38:57,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 222. [2021-07-09 17:38:57,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.2036199095022626) internal successors, (487), 221 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:57,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 487 transitions. [2021-07-09 17:38:57,453 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 487 transitions. Word has length 20 [2021-07-09 17:38:57,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:57,453 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 487 transitions. [2021-07-09 17:38:57,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:57,453 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 487 transitions. [2021-07-09 17:38:57,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:57,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:57,454 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:57,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 684 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3474 [2021-07-09 17:38:57,654 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:57,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:57,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1820264674, now seen corresponding path program 684 times [2021-07-09 17:38:57,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:57,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499819472] [2021-07-09 17:38:57,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:57,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:57,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499819472] [2021-07-09 17:38:57,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499819472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:57,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248700514] [2021-07-09 17:38:57,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:57,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:38:57,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:57,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:57,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:58,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:58,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:58,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:58,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:58,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:58,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:58,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:58,077 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:38:58,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:58,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:58,080 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:58,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:58,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:58,088 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:38:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:58,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248700514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:58,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:58,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:58,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210969860] [2021-07-09 17:38:58,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:58,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:58,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:58,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:58,128 INFO L87 Difference]: Start difference. First operand 222 states and 487 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:58,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:58,320 INFO L93 Difference]: Finished difference Result 244 states and 522 transitions. [2021-07-09 17:38:58,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:38:58,320 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:58,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:58,320 INFO L225 Difference]: With dead ends: 244 [2021-07-09 17:38:58,320 INFO L226 Difference]: Without dead ends: 228 [2021-07-09 17:38:58,320 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 414.0ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:38:58,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-09 17:38:58,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2021-07-09 17:38:58,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.201793721973094) internal successors, (491), 223 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:58,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 491 transitions. [2021-07-09 17:38:58,322 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 491 transitions. Word has length 20 [2021-07-09 17:38:58,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:58,322 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 491 transitions. [2021-07-09 17:38:58,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:58,322 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 491 transitions. [2021-07-09 17:38:58,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:58,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:58,323 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:58,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3477,685 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:58,523 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:58,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:58,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1612697558, now seen corresponding path program 685 times [2021-07-09 17:38:58,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:58,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717169329] [2021-07-09 17:38:58,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:58,714 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:58,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:58,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717169329] [2021-07-09 17:38:58,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717169329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:58,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468408852] [2021-07-09 17:38:58,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:58,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:58,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:58,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:58,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:58,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:58,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:58,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:58,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:58,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:58,940 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:38:58,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:58,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:58,943 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:58,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:58,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:38:58,950 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:38:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:58,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468408852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:58,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:58,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:58,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073987542] [2021-07-09 17:38:58,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:58,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:58,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:58,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:58,991 INFO L87 Difference]: Start difference. First operand 224 states and 491 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:59,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:59,345 INFO L93 Difference]: Finished difference Result 246 states and 530 transitions. [2021-07-09 17:38:59,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:38:59,345 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:59,345 INFO L225 Difference]: With dead ends: 246 [2021-07-09 17:38:59,345 INFO L226 Difference]: Without dead ends: 233 [2021-07-09 17:38:59,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 495.8ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:38:59,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-07-09 17:38:59,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 225. [2021-07-09 17:38:59,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.200892857142857) internal successors, (493), 224 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 493 transitions. [2021-07-09 17:38:59,347 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 493 transitions. Word has length 20 [2021-07-09 17:38:59,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:59,347 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 493 transitions. [2021-07-09 17:38:59,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:59,347 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 493 transitions. [2021-07-09 17:38:59,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:59,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:59,348 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:59,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3478,686 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:59,548 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:59,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:59,548 INFO L82 PathProgramCache]: Analyzing trace with hash -476512286, now seen corresponding path program 686 times [2021-07-09 17:38:59,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:59,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226382812] [2021-07-09 17:38:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:59,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:59,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226382812] [2021-07-09 17:38:59,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226382812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:59,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587296681] [2021-07-09 17:38:59,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:59,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:59,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:59,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:38:59,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:59,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:59,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:59,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:59,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:59,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:59,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:59,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:59,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:59,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:59,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:59,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:59,935 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:59,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:59,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:38:59,938 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:38:59,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:59,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:59,962 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:39:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:00,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587296681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:00,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:00,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:00,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80119028] [2021-07-09 17:39:00,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:00,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:00,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:00,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:00,040 INFO L87 Difference]: Start difference. First operand 225 states and 493 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:00,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:00,494 INFO L93 Difference]: Finished difference Result 266 states and 562 transitions. [2021-07-09 17:39:00,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:39:00,494 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:00,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:00,495 INFO L225 Difference]: With dead ends: 266 [2021-07-09 17:39:00,495 INFO L226 Difference]: Without dead ends: 250 [2021-07-09 17:39:00,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 542.2ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:39:00,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-07-09 17:39:00,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 224. [2021-07-09 17:39:00,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.201793721973094) internal successors, (491), 223 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:00,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 491 transitions. [2021-07-09 17:39:00,497 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 491 transitions. Word has length 20 [2021-07-09 17:39:00,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:00,497 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 491 transitions. [2021-07-09 17:39:00,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:00,497 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 491 transitions. [2021-07-09 17:39:00,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:00,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:00,498 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:00,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3479,687 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:00,698 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:00,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:00,698 INFO L82 PathProgramCache]: Analyzing trace with hash 575485618, now seen corresponding path program 687 times [2021-07-09 17:39:00,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:00,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393796039] [2021-07-09 17:39:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:00,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:00,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393796039] [2021-07-09 17:39:00,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393796039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:00,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584874405] [2021-07-09 17:39:00,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:00,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:39:00,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:00,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:00,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:01,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:01,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:01,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:01,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:01,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:01,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:01,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:01,100 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-07-09 17:39:01,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:01,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:39:01,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:01,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:01,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:01,109 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:01,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584874405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:01,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:01,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:01,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950574588] [2021-07-09 17:39:01,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:01,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:01,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:01,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:01,148 INFO L87 Difference]: Start difference. First operand 224 states and 491 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:01,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:01,444 INFO L93 Difference]: Finished difference Result 247 states and 532 transitions. [2021-07-09 17:39:01,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:39:01,444 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:01,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:01,444 INFO L225 Difference]: With dead ends: 247 [2021-07-09 17:39:01,444 INFO L226 Difference]: Without dead ends: 234 [2021-07-09 17:39:01,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 432.8ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:39:01,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-09 17:39:01,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 226. [2021-07-09 17:39:01,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.2) internal successors, (495), 225 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:01,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 495 transitions. [2021-07-09 17:39:01,446 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 495 transitions. Word has length 20 [2021-07-09 17:39:01,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:01,447 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 495 transitions. [2021-07-09 17:39:01,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:01,447 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 495 transitions. [2021-07-09 17:39:01,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:01,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:01,447 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:01,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3482,688 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:01,647 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:01,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:01,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1711670890, now seen corresponding path program 688 times [2021-07-09 17:39:01,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:01,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454664075] [2021-07-09 17:39:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:01,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:01,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454664075] [2021-07-09 17:39:01,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454664075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:01,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563030067] [2021-07-09 17:39:01,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:01,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:01,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:01,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:01,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:02,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:02,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:02,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:02,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:02,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:02,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:02,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:02,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:02,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:02,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:02,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:02,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:02,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:02,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:02,030 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:02,082 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-07-09 17:39:02,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:02,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:02,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:02,086 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:02,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:02,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:02,090 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:02,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:02,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:02,112 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:39:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:02,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563030067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:02,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:02,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:02,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41039505] [2021-07-09 17:39:02,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:02,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:02,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:02,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:02,198 INFO L87 Difference]: Start difference. First operand 226 states and 495 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:02,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:02,657 INFO L93 Difference]: Finished difference Result 268 states and 563 transitions. [2021-07-09 17:39:02,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:39:02,657 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:02,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:02,658 INFO L225 Difference]: With dead ends: 268 [2021-07-09 17:39:02,658 INFO L226 Difference]: Without dead ends: 249 [2021-07-09 17:39:02,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 599.6ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:39:02,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-09 17:39:02,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 225. [2021-07-09 17:39:02,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.200892857142857) internal successors, (493), 224 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:02,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 493 transitions. [2021-07-09 17:39:02,660 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 493 transitions. Word has length 20 [2021-07-09 17:39:02,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:02,660 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 493 transitions. [2021-07-09 17:39:02,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:02,660 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 493 transitions. [2021-07-09 17:39:02,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:02,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:02,660 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:02,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 689 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3483 [2021-07-09 17:39:02,861 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:02,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:02,861 INFO L82 PathProgramCache]: Analyzing trace with hash -434499870, now seen corresponding path program 689 times [2021-07-09 17:39:02,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:02,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476648441] [2021-07-09 17:39:02,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:03,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:03,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476648441] [2021-07-09 17:39:03,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476648441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:03,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221988778] [2021-07-09 17:39:03,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:03,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:39:03,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:03,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:03,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:03,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:03,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:03,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:03,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:03,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:03,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:03,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:03,339 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:39:03,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:03,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:03,343 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:03,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:03,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:03,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:03,377 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:03,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:03,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:03,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:03,401 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:03,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:03,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:03,426 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:39:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:03,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221988778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:03,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:03,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:03,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801534240] [2021-07-09 17:39:03,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:03,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:03,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:03,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:03,523 INFO L87 Difference]: Start difference. First operand 225 states and 493 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:03,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:03,947 INFO L93 Difference]: Finished difference Result 279 states and 590 transitions. [2021-07-09 17:39:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:39:03,947 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:03,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:03,947 INFO L225 Difference]: With dead ends: 279 [2021-07-09 17:39:03,947 INFO L226 Difference]: Without dead ends: 260 [2021-07-09 17:39:03,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 574.6ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:39:03,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-07-09 17:39:03,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 224. [2021-07-09 17:39:03,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.201793721973094) internal successors, (491), 223 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 491 transitions. [2021-07-09 17:39:03,950 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 491 transitions. Word has length 20 [2021-07-09 17:39:03,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:03,950 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 491 transitions. [2021-07-09 17:39:03,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:03,950 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 491 transitions. [2021-07-09 17:39:03,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:03,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:03,950 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:04,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3486,690 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:04,151 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:04,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:04,151 INFO L82 PathProgramCache]: Analyzing trace with hash 905087274, now seen corresponding path program 690 times [2021-07-09 17:39:04,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:04,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50778502] [2021-07-09 17:39:04,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:04,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:04,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50778502] [2021-07-09 17:39:04,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50778502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:04,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866176421] [2021-07-09 17:39:04,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:04,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:39:04,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:04,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:39:04,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:04,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:04,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:04,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:04,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:04,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:04,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:39:04,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:04,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:04,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:04,540 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:39:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:04,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866176421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:04,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:04,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:04,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538993919] [2021-07-09 17:39:04,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:04,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:04,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:04,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:04,580 INFO L87 Difference]: Start difference. First operand 224 states and 491 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:04,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:04,793 INFO L93 Difference]: Finished difference Result 248 states and 532 transitions. [2021-07-09 17:39:04,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:39:04,794 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:04,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:04,794 INFO L225 Difference]: With dead ends: 248 [2021-07-09 17:39:04,794 INFO L226 Difference]: Without dead ends: 241 [2021-07-09 17:39:04,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 393.7ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:39:04,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-09 17:39:04,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 226. [2021-07-09 17:39:04,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.2044444444444444) internal successors, (496), 225 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 496 transitions. [2021-07-09 17:39:04,796 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 496 transitions. Word has length 20 [2021-07-09 17:39:04,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:04,796 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 496 transitions. [2021-07-09 17:39:04,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:04,796 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 496 transitions. [2021-07-09 17:39:04,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:04,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:04,797 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:04,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3491,691 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:04,997 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:04,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:04,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1857440482, now seen corresponding path program 691 times [2021-07-09 17:39:04,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:04,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41814691] [2021-07-09 17:39:04,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:05,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:05,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41814691] [2021-07-09 17:39:05,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41814691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:05,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024205714] [2021-07-09 17:39:05,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:05,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:05,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:05,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:05,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:05,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:05,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:05,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:05,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:05,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:05,396 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-07-09 17:39:05,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:05,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:05,399 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:05,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:05,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:05,406 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:05,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024205714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:05,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:05,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:39:05,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474679883] [2021-07-09 17:39:05,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:39:05,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:05,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:39:05,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:05,451 INFO L87 Difference]: Start difference. First operand 226 states and 496 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:05,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:05,719 INFO L93 Difference]: Finished difference Result 252 states and 537 transitions. [2021-07-09 17:39:05,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:39:05,720 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:05,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:05,720 INFO L225 Difference]: With dead ends: 252 [2021-07-09 17:39:05,720 INFO L226 Difference]: Without dead ends: 236 [2021-07-09 17:39:05,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 444.1ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:39:05,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-09 17:39:05,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 227. [2021-07-09 17:39:05,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.2035398230088497) internal successors, (498), 226 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:05,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 498 transitions. [2021-07-09 17:39:05,722 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 498 transitions. Word has length 20 [2021-07-09 17:39:05,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:05,722 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 498 transitions. [2021-07-09 17:39:05,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:05,722 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 498 transitions. [2021-07-09 17:39:05,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:05,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:05,723 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:05,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 692 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3492 [2021-07-09 17:39:05,923 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:05,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:05,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1575521750, now seen corresponding path program 692 times [2021-07-09 17:39:05,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:05,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680079766] [2021-07-09 17:39:05,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:06,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:06,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680079766] [2021-07-09 17:39:06,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680079766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:06,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010132978] [2021-07-09 17:39:06,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:06,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:06,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:06,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:39:06,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:06,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:06,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:06,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:06,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:06,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:06,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:06,313 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:06,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:06,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:06,319 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:39:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:06,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010132978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:06,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:06,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:39:06,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706269769] [2021-07-09 17:39:06,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:39:06,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:06,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:39:06,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:39:06,338 INFO L87 Difference]: Start difference. First operand 227 states and 498 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:06,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:06,685 INFO L93 Difference]: Finished difference Result 254 states and 544 transitions. [2021-07-09 17:39:06,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:39:06,685 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:06,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:06,686 INFO L225 Difference]: With dead ends: 254 [2021-07-09 17:39:06,686 INFO L226 Difference]: Without dead ends: 247 [2021-07-09 17:39:06,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 490.6ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:39:06,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-09 17:39:06,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 228. [2021-07-09 17:39:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.20704845814978) internal successors, (501), 227 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:06,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 501 transitions. [2021-07-09 17:39:06,688 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 501 transitions. Word has length 20 [2021-07-09 17:39:06,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:06,688 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 501 transitions. [2021-07-09 17:39:06,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:06,688 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 501 transitions. [2021-07-09 17:39:06,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:06,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:06,688 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:06,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 693 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3493 [2021-07-09 17:39:06,889 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:06,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:06,889 INFO L82 PathProgramCache]: Analyzing trace with hash -439336478, now seen corresponding path program 693 times [2021-07-09 17:39:06,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:06,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870392638] [2021-07-09 17:39:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:07,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:07,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870392638] [2021-07-09 17:39:07,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870392638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:07,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356610462] [2021-07-09 17:39:07,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:07,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:39:07,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:07,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:39:07,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:07,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:07,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:07,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:07,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:07,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:07,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:07,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:07,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:07,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:07,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:07,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:07,301 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:07,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:07,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:07,304 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:07,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:07,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:07,324 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:39:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:07,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356610462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:07,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:07,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:39:07,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857174253] [2021-07-09 17:39:07,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:39:07,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:07,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:39:07,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:07,399 INFO L87 Difference]: Start difference. First operand 228 states and 501 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:07,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:07,925 INFO L93 Difference]: Finished difference Result 281 states and 590 transitions. [2021-07-09 17:39:07,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:39:07,925 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:07,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:07,925 INFO L225 Difference]: With dead ends: 281 [2021-07-09 17:39:07,925 INFO L226 Difference]: Without dead ends: 265 [2021-07-09 17:39:07,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 656.8ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:39:07,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-07-09 17:39:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 225. [2021-07-09 17:39:07,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.200892857142857) internal successors, (493), 224 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:07,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 493 transitions. [2021-07-09 17:39:07,928 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 493 transitions. Word has length 20 [2021-07-09 17:39:07,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:07,928 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 493 transitions. [2021-07-09 17:39:07,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:07,928 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 493 transitions. [2021-07-09 17:39:07,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:07,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:07,928 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:08,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3494,694 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:08,128 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:08,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:08,129 INFO L82 PathProgramCache]: Analyzing trace with hash 971642202, now seen corresponding path program 694 times [2021-07-09 17:39:08,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:08,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930296600] [2021-07-09 17:39:08,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:08,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:08,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930296600] [2021-07-09 17:39:08,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930296600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:08,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891921455] [2021-07-09 17:39:08,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:08,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:08,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:08,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:08,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:08,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:08,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:08,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:08,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:08,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:08,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:08,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:08,514 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-07-09 17:39:08,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:08,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:39:08,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:08,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:08,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:08,523 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:08,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891921455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:08,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:08,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:08,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888638577] [2021-07-09 17:39:08,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:08,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:08,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:08,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:08,563 INFO L87 Difference]: Start difference. First operand 225 states and 493 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:08,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:08,798 INFO L93 Difference]: Finished difference Result 246 states and 526 transitions. [2021-07-09 17:39:08,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:08,798 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:08,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:08,799 INFO L225 Difference]: With dead ends: 246 [2021-07-09 17:39:08,799 INFO L226 Difference]: Without dead ends: 230 [2021-07-09 17:39:08,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 408.9ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:39:08,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-09 17:39:08,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2021-07-09 17:39:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.1991150442477876) internal successors, (497), 226 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 497 transitions. [2021-07-09 17:39:08,801 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 497 transitions. Word has length 20 [2021-07-09 17:39:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:08,801 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 497 transitions. [2021-07-09 17:39:08,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:08,801 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 497 transitions. [2021-07-09 17:39:08,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:08,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:08,801 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:09,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3497,695 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:09,002 INFO L430 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:09,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:09,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1833647266, now seen corresponding path program 695 times [2021-07-09 17:39:09,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:09,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149481597] [2021-07-09 17:39:09,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:09,186 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:09,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:09,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149481597] [2021-07-09 17:39:09,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149481597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:09,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729169356] [2021-07-09 17:39:09,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:09,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:39:09,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:09,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:09,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:09,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:09,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:09,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:09,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:09,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:09,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:09,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:09,409 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:39:09,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:09,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:09,412 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:09,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:09,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:09,419 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:09,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729169356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:09,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:09,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:39:09,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242747765] [2021-07-09 17:39:09,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:39:09,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:09,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:39:09,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:09,455 INFO L87 Difference]: Start difference. First operand 227 states and 497 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:09,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:09,832 INFO L93 Difference]: Finished difference Result 247 states and 532 transitions. [2021-07-09 17:39:09,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:39:09,832 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:09,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:09,833 INFO L225 Difference]: With dead ends: 247 [2021-07-09 17:39:09,833 INFO L226 Difference]: Without dead ends: 234 [2021-07-09 17:39:09,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 526.8ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:39:09,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-09 17:39:09,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2021-07-09 17:39:09,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.198237885462555) internal successors, (499), 227 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 499 transitions. [2021-07-09 17:39:09,835 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 499 transitions. Word has length 20 [2021-07-09 17:39:09,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:09,835 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 499 transitions. [2021-07-09 17:39:09,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:09,835 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 499 transitions. [2021-07-09 17:39:09,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:09,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:09,835 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:10,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3498,696 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:10,036 INFO L430 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:10,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:10,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1325134758, now seen corresponding path program 696 times [2021-07-09 17:39:10,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:10,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404922730] [2021-07-09 17:39:10,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:10,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:10,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:10,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404922730] [2021-07-09 17:39:10,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404922730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:10,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2276963] [2021-07-09 17:39:10,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:10,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:39:10,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:10,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:39:10,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:10,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:10,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:10,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:10,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:10,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:10,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:10,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:10,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:10,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:10,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:10,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:10,390 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:10,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:10,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:10,393 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:10,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:10,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:10,413 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:39:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:10,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2276963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:10,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:10,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:39:10,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339407193] [2021-07-09 17:39:10,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:39:10,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:10,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:39:10,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:10,482 INFO L87 Difference]: Start difference. First operand 228 states and 499 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:10,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:10,840 INFO L93 Difference]: Finished difference Result 267 states and 564 transitions. [2021-07-09 17:39:10,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:39:10,841 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:10,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:10,841 INFO L225 Difference]: With dead ends: 267 [2021-07-09 17:39:10,841 INFO L226 Difference]: Without dead ends: 251 [2021-07-09 17:39:10,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 510.9ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:39:10,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-07-09 17:39:10,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 226. [2021-07-09 17:39:10,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.2) internal successors, (495), 225 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:10,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 495 transitions. [2021-07-09 17:39:10,843 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 495 transitions. Word has length 20 [2021-07-09 17:39:10,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:10,843 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 495 transitions. [2021-07-09 17:39:10,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:10,843 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 495 transitions. [2021-07-09 17:39:10,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:10,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:10,844 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:11,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3499,697 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:11,044 INFO L430 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:11,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:11,044 INFO L82 PathProgramCache]: Analyzing trace with hash -273136854, now seen corresponding path program 697 times [2021-07-09 17:39:11,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:11,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71179222] [2021-07-09 17:39:11,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:11,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:11,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71179222] [2021-07-09 17:39:11,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71179222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:11,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836091653] [2021-07-09 17:39:11,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:11,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:11,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:11,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:11,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:11,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:11,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:11,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:11,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:11,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:11,399 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-07-09 17:39:11,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:11,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:11,402 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:11,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:11,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:11,409 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:11,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836091653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:11,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:11,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:11,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548079985] [2021-07-09 17:39:11,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:11,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:11,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:11,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:11,446 INFO L87 Difference]: Start difference. First operand 226 states and 495 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:11,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:11,730 INFO L93 Difference]: Finished difference Result 251 states and 540 transitions. [2021-07-09 17:39:11,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:39:11,731 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:11,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:11,731 INFO L225 Difference]: With dead ends: 251 [2021-07-09 17:39:11,731 INFO L226 Difference]: Without dead ends: 238 [2021-07-09 17:39:11,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 398.9ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:39:11,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-09 17:39:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 228. [2021-07-09 17:39:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.198237885462555) internal successors, (499), 227 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 499 transitions. [2021-07-09 17:39:11,733 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 499 transitions. Word has length 20 [2021-07-09 17:39:11,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:11,733 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 499 transitions. [2021-07-09 17:39:11,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:11,733 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 499 transitions. [2021-07-09 17:39:11,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:11,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:11,733 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:11,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3502,698 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:11,934 INFO L430 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:11,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:11,934 INFO L82 PathProgramCache]: Analyzing trace with hash 863048418, now seen corresponding path program 698 times [2021-07-09 17:39:11,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:11,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760304573] [2021-07-09 17:39:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:12,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:12,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760304573] [2021-07-09 17:39:12,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760304573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:12,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455811332] [2021-07-09 17:39:12,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:12,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:12,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:12,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:39:12,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:12,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:12,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:12,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:12,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:12,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:12,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:12,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:12,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:12,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:12,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:12,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:12,319 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:12,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:12,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:12,322 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:12,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:12,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:12,342 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:39:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:12,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455811332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:12,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:12,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:12,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028123136] [2021-07-09 17:39:12,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:12,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:12,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:12,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:12,414 INFO L87 Difference]: Start difference. First operand 228 states and 499 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:12,853 INFO L93 Difference]: Finished difference Result 270 states and 570 transitions. [2021-07-09 17:39:12,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:39:12,853 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:12,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:12,853 INFO L225 Difference]: With dead ends: 270 [2021-07-09 17:39:12,853 INFO L226 Difference]: Without dead ends: 254 [2021-07-09 17:39:12,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 586.2ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:39:12,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-09 17:39:12,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 227. [2021-07-09 17:39:12,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.1991150442477876) internal successors, (497), 226 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:12,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 497 transitions. [2021-07-09 17:39:12,856 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 497 transitions. Word has length 20 [2021-07-09 17:39:12,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:12,856 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 497 transitions. [2021-07-09 17:39:12,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:12,856 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 497 transitions. [2021-07-09 17:39:12,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:12,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:12,856 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:13,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 699 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3503 [2021-07-09 17:39:13,057 INFO L430 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:13,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:13,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1283122342, now seen corresponding path program 699 times [2021-07-09 17:39:13,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:13,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628304523] [2021-07-09 17:39:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:13,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:13,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628304523] [2021-07-09 17:39:13,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628304523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:13,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517248213] [2021-07-09 17:39:13,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:13,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:39:13,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:13,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:39:13,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:13,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:13,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:13,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:13,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:13,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:13,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:13,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:13,477 INFO L628 ElimStorePlain]: treesize reduction 75, result has 45.3 percent of original size [2021-07-09 17:39:13,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:13,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:13,481 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:13,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:13,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:13,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:13,502 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:13,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:13,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:13,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:13,523 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:13,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:13,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:13,541 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:153, output treesize:32 [2021-07-09 17:39:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:13,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517248213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:13,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:13,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:13,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847400398] [2021-07-09 17:39:13,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:13,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:13,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:13,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:13,613 INFO L87 Difference]: Start difference. First operand 227 states and 497 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:14,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:14,079 INFO L93 Difference]: Finished difference Result 281 states and 594 transitions. [2021-07-09 17:39:14,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:39:14,080 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:14,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:14,080 INFO L225 Difference]: With dead ends: 281 [2021-07-09 17:39:14,080 INFO L226 Difference]: Without dead ends: 262 [2021-07-09 17:39:14,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 586.4ms TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:39:14,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-09 17:39:14,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 227. [2021-07-09 17:39:14,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.1991150442477876) internal successors, (497), 226 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:14,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 497 transitions. [2021-07-09 17:39:14,082 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 497 transitions. Word has length 20 [2021-07-09 17:39:14,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:14,082 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 497 transitions. [2021-07-09 17:39:14,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:14,082 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 497 transitions. [2021-07-09 17:39:14,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:14,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:14,083 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:14,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 700 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3506 [2021-07-09 17:39:14,283 INFO L430 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:14,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:14,283 INFO L82 PathProgramCache]: Analyzing trace with hash -718300702, now seen corresponding path program 700 times [2021-07-09 17:39:14,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:14,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368078114] [2021-07-09 17:39:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:14,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:14,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368078114] [2021-07-09 17:39:14,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368078114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:14,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687989903] [2021-07-09 17:39:14,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:14,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:14,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:14,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:14,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:14,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:14,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:14,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:14,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:14,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:14,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:14,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:14,621 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:39:14,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:14,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:14,624 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:14,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:14,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:14,631 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:14,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687989903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:14,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:14,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:39:14,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299654721] [2021-07-09 17:39:14,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:39:14,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:14,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:39:14,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:14,665 INFO L87 Difference]: Start difference. First operand 227 states and 497 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:15,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:15,006 INFO L93 Difference]: Finished difference Result 257 states and 552 transitions. [2021-07-09 17:39:15,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:39:15,006 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:15,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:15,007 INFO L225 Difference]: With dead ends: 257 [2021-07-09 17:39:15,007 INFO L226 Difference]: Without dead ends: 241 [2021-07-09 17:39:15,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 463.6ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:39:15,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-09 17:39:15,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 229. [2021-07-09 17:39:15,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.1973684210526314) internal successors, (501), 228 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 501 transitions. [2021-07-09 17:39:15,009 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 501 transitions. Word has length 20 [2021-07-09 17:39:15,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:15,009 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 501 transitions. [2021-07-09 17:39:15,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:15,009 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 501 transitions. [2021-07-09 17:39:15,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:15,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:15,009 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:15,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3511,701 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:15,210 INFO L430 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:15,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:15,210 INFO L82 PathProgramCache]: Analyzing trace with hash 143704362, now seen corresponding path program 701 times [2021-07-09 17:39:15,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:15,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670044859] [2021-07-09 17:39:15,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:15,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:15,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670044859] [2021-07-09 17:39:15,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670044859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:15,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374366363] [2021-07-09 17:39:15,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:15,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:39:15,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:15,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:15,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:15,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:15,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:15,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:15,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:15,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:15,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:15,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:15,584 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:39:15,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:15,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:15,587 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:15,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:15,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:15,593 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:15,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374366363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:15,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:15,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:39:15,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464534376] [2021-07-09 17:39:15,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:39:15,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:15,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:39:15,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:15,628 INFO L87 Difference]: Start difference. First operand 229 states and 501 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:15,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:15,931 INFO L93 Difference]: Finished difference Result 249 states and 533 transitions. [2021-07-09 17:39:15,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:39:15,932 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:15,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:15,932 INFO L225 Difference]: With dead ends: 249 [2021-07-09 17:39:15,932 INFO L226 Difference]: Without dead ends: 236 [2021-07-09 17:39:15,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 471.8ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:39:15,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-09 17:39:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 230. [2021-07-09 17:39:15,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1965065502183405) internal successors, (503), 229 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 503 transitions. [2021-07-09 17:39:15,934 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 503 transitions. Word has length 20 [2021-07-09 17:39:15,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:15,934 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 503 transitions. [2021-07-09 17:39:15,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:15,934 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 503 transitions. [2021-07-09 17:39:15,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:15,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:15,934 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:16,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3512,702 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:16,135 INFO L430 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:16,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:16,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1279889634, now seen corresponding path program 702 times [2021-07-09 17:39:16,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:16,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680151317] [2021-07-09 17:39:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:16,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:16,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680151317] [2021-07-09 17:39:16,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680151317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:16,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672782390] [2021-07-09 17:39:16,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:16,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:39:16,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:16,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:16,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:16,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:16,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:16,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:16,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:16,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:16,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:16,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:16,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:16,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:16,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:16,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:16,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:16,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:16,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:16,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:16,583 INFO L628 ElimStorePlain]: treesize reduction 87, result has 40.8 percent of original size [2021-07-09 17:39:16,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:16,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:16,587 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:16,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:16,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:16,609 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:173, output treesize:36 [2021-07-09 17:39:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:16,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672782390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:16,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:16,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:16,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16390525] [2021-07-09 17:39:16,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:16,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:16,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:16,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:16,691 INFO L87 Difference]: Start difference. First operand 230 states and 503 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:17,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:17,310 INFO L93 Difference]: Finished difference Result 273 states and 573 transitions. [2021-07-09 17:39:17,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:39:17,310 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:17,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:17,310 INFO L225 Difference]: With dead ends: 273 [2021-07-09 17:39:17,310 INFO L226 Difference]: Without dead ends: 254 [2021-07-09 17:39:17,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 734.1ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:39:17,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-09 17:39:17,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 228. [2021-07-09 17:39:17,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.198237885462555) internal successors, (499), 227 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:17,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 499 transitions. [2021-07-09 17:39:17,313 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 499 transitions. Word has length 20 [2021-07-09 17:39:17,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:17,313 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 499 transitions. [2021-07-09 17:39:17,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:17,313 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 499 transitions. [2021-07-09 17:39:17,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:17,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:17,313 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:17,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 703 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3513 [2021-07-09 17:39:17,513 INFO L430 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:17,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:17,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1963079758, now seen corresponding path program 703 times [2021-07-09 17:39:17,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:17,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284371495] [2021-07-09 17:39:17,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:17,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:17,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284371495] [2021-07-09 17:39:17,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284371495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:17,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63212560] [2021-07-09 17:39:17,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:17,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:17,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:17,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:17,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:17,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:17,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:17,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:17,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:17,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:17,903 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:39:17,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:17,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:17,905 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:17,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:17,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:17,913 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:17,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63212560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:17,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:17,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:17,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105075195] [2021-07-09 17:39:17,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:17,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:17,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:17,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:17,952 INFO L87 Difference]: Start difference. First operand 228 states and 499 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:18,320 INFO L93 Difference]: Finished difference Result 252 states and 542 transitions. [2021-07-09 17:39:18,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:39:18,320 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:18,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:18,321 INFO L225 Difference]: With dead ends: 252 [2021-07-09 17:39:18,321 INFO L226 Difference]: Without dead ends: 239 [2021-07-09 17:39:18,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 474.6ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:39:18,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-07-09 17:39:18,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 230. [2021-07-09 17:39:18,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1965065502183405) internal successors, (503), 229 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:18,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 503 transitions. [2021-07-09 17:39:18,323 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 503 transitions. Word has length 20 [2021-07-09 17:39:18,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:18,323 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 503 transitions. [2021-07-09 17:39:18,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:18,323 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 503 transitions. [2021-07-09 17:39:18,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:18,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:18,323 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:18,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3516,704 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:18,536 INFO L430 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:18,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:18,536 INFO L82 PathProgramCache]: Analyzing trace with hash -826894486, now seen corresponding path program 704 times [2021-07-09 17:39:18,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:18,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741585895] [2021-07-09 17:39:18,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:18,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:18,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741585895] [2021-07-09 17:39:18,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741585895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:18,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257479619] [2021-07-09 17:39:18,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:18,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:18,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:18,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:39:18,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:18,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:18,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:18,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:18,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:18,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:18,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:18,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:18,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:18,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:18,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:18,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:18,919 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:18,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:18,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:18,922 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:18,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:18,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:18,942 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:39:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:19,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257479619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:19,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:19,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:19,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975283] [2021-07-09 17:39:19,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:19,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:19,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:19,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:19,012 INFO L87 Difference]: Start difference. First operand 230 states and 503 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:19,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:19,328 INFO L93 Difference]: Finished difference Result 250 states and 541 transitions. [2021-07-09 17:39:19,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:39:19,329 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:19,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:19,329 INFO L225 Difference]: With dead ends: 250 [2021-07-09 17:39:19,329 INFO L226 Difference]: Without dead ends: 243 [2021-07-09 17:39:19,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 548.5ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:39:19,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-07-09 17:39:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 229. [2021-07-09 17:39:19,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.1973684210526314) internal successors, (501), 228 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:19,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 501 transitions. [2021-07-09 17:39:19,331 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 501 transitions. Word has length 20 [2021-07-09 17:39:19,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:19,331 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 501 transitions. [2021-07-09 17:39:19,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 501 transitions. [2021-07-09 17:39:19,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:19,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:19,331 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:19,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 705 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3517 [2021-07-09 17:39:19,532 INFO L430 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:19,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:19,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1321902050, now seen corresponding path program 705 times [2021-07-09 17:39:19,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:19,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801983858] [2021-07-09 17:39:19,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:19,732 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:19,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:19,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801983858] [2021-07-09 17:39:19,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801983858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:19,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959967817] [2021-07-09 17:39:19,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:19,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:39:19,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:19,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:19,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:19,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:19,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:19,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:19,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:19,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:19,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:19,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:19,972 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-07-09 17:39:19,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:19,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:19,976 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:19,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:20,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:20,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:20,001 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:20,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:20,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:20,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:20,025 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:20,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:20,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:20,045 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:39:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:20,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959967817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:20,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:20,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:20,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665595855] [2021-07-09 17:39:20,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:20,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:20,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:20,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:20,122 INFO L87 Difference]: Start difference. First operand 229 states and 501 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:20,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:20,510 INFO L93 Difference]: Finished difference Result 287 states and 606 transitions. [2021-07-09 17:39:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:39:20,511 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:20,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:20,511 INFO L225 Difference]: With dead ends: 287 [2021-07-09 17:39:20,511 INFO L226 Difference]: Without dead ends: 268 [2021-07-09 17:39:20,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 523.7ms TimeCoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:39:20,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-07-09 17:39:20,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 229. [2021-07-09 17:39:20,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.1973684210526314) internal successors, (501), 228 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:20,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 501 transitions. [2021-07-09 17:39:20,513 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 501 transitions. Word has length 20 [2021-07-09 17:39:20,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:20,514 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 501 transitions. [2021-07-09 17:39:20,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:20,514 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 501 transitions. [2021-07-09 17:39:20,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:20,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:20,514 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:20,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3520,706 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:20,714 INFO L430 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:20,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:20,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1446089258, now seen corresponding path program 706 times [2021-07-09 17:39:20,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:20,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079408610] [2021-07-09 17:39:20,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:20,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:20,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079408610] [2021-07-09 17:39:20,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079408610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:20,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131353404] [2021-07-09 17:39:20,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:20,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:20,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:20,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:20,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:21,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:21,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:21,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:21,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:21,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:21,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:21,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:21,111 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-07-09 17:39:21,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:21,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:39:21,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:21,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:21,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:21,121 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:21,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131353404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:21,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:21,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:21,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315624739] [2021-07-09 17:39:21,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:21,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:21,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:21,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:21,162 INFO L87 Difference]: Start difference. First operand 229 states and 501 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:21,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:21,431 INFO L93 Difference]: Finished difference Result 257 states and 552 transitions. [2021-07-09 17:39:21,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:39:21,431 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:21,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:21,432 INFO L225 Difference]: With dead ends: 257 [2021-07-09 17:39:21,432 INFO L226 Difference]: Without dead ends: 244 [2021-07-09 17:39:21,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 417.9ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:39:21,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-09 17:39:21,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 232. [2021-07-09 17:39:21,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.1948051948051948) internal successors, (507), 231 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:21,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 507 transitions. [2021-07-09 17:39:21,434 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 507 transitions. Word has length 20 [2021-07-09 17:39:21,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:21,434 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 507 transitions. [2021-07-09 17:39:21,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:21,434 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 507 transitions. [2021-07-09 17:39:21,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:21,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:21,434 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:21,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 707 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3525 [2021-07-09 17:39:21,635 INFO L430 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:21,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:21,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1712692766, now seen corresponding path program 707 times [2021-07-09 17:39:21,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:21,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215950827] [2021-07-09 17:39:21,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:21,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:21,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215950827] [2021-07-09 17:39:21,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215950827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:21,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824237306] [2021-07-09 17:39:21,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:21,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:39:21,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:21,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:21,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:22,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:22,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:22,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:22,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:22,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:22,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:22,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:22,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:22,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:22,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:22,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:22,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:22,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:22,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:22,044 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:22,102 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-07-09 17:39:22,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:22,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:22,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:22,106 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:22,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:22,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:22,110 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:22,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:22,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:22,134 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:39:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:22,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824237306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:22,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:22,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:22,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515063723] [2021-07-09 17:39:22,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:22,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:22,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:22,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:22,220 INFO L87 Difference]: Start difference. First operand 232 states and 507 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:22,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:22,689 INFO L93 Difference]: Finished difference Result 278 states and 583 transitions. [2021-07-09 17:39:22,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:39:22,690 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:22,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:22,690 INFO L225 Difference]: With dead ends: 278 [2021-07-09 17:39:22,690 INFO L226 Difference]: Without dead ends: 259 [2021-07-09 17:39:22,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 618.7ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:39:22,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-07-09 17:39:22,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 231. [2021-07-09 17:39:22,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.1956521739130435) internal successors, (505), 230 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:22,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 505 transitions. [2021-07-09 17:39:22,692 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 505 transitions. Word has length 20 [2021-07-09 17:39:22,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:22,692 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 505 transitions. [2021-07-09 17:39:22,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:22,692 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 505 transitions. [2021-07-09 17:39:22,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:22,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:22,693 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:22,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3526,708 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:22,901 INFO L430 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:22,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:22,901 INFO L82 PathProgramCache]: Analyzing trace with hash 660035238, now seen corresponding path program 708 times [2021-07-09 17:39:22,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:22,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548621718] [2021-07-09 17:39:22,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:39:22,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:22,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548621718] [2021-07-09 17:39:22,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548621718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:22,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334329390] [2021-07-09 17:39:22,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:22,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:39:22,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:22,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:39:22,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:39:23,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334329390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:23,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:23,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:39:23,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582967348] [2021-07-09 17:39:23,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:39:23,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:23,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:39:23,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:39:23,144 INFO L87 Difference]: Start difference. First operand 231 states and 505 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:23,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:23,285 INFO L93 Difference]: Finished difference Result 279 states and 601 transitions. [2021-07-09 17:39:23,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:39:23,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:23,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:23,286 INFO L225 Difference]: With dead ends: 279 [2021-07-09 17:39:23,286 INFO L226 Difference]: Without dead ends: 279 [2021-07-09 17:39:23,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:39:23,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-07-09 17:39:23,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 231. [2021-07-09 17:39:23,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.1956521739130435) internal successors, (505), 230 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:23,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 505 transitions. [2021-07-09 17:39:23,288 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 505 transitions. Word has length 20 [2021-07-09 17:39:23,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:23,288 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 505 transitions. [2021-07-09 17:39:23,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:23,288 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 505 transitions. [2021-07-09 17:39:23,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:23,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:23,288 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:23,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3529,709 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:23,489 INFO L430 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:23,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:23,489 INFO L82 PathProgramCache]: Analyzing trace with hash 436103770, now seen corresponding path program 709 times [2021-07-09 17:39:23,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:23,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521987211] [2021-07-09 17:39:23,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:23,683 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:23,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:23,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521987211] [2021-07-09 17:39:23,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521987211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:23,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134980114] [2021-07-09 17:39:23,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:23,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:23,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:23,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:23,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:23,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:23,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:23,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:23,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:23,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:23,924 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:39:23,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:23,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:23,927 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:23,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:23,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:23,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:23,953 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:23,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:23,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:23,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:23,980 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:24,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:24,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:24,002 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:39:24,082 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:24,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134980114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:24,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:24,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:24,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647464249] [2021-07-09 17:39:24,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:24,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:24,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:24,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:24,083 INFO L87 Difference]: Start difference. First operand 231 states and 505 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:24,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:24,602 INFO L93 Difference]: Finished difference Result 287 states and 606 transitions. [2021-07-09 17:39:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:39:24,602 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:24,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:24,602 INFO L225 Difference]: With dead ends: 287 [2021-07-09 17:39:24,602 INFO L226 Difference]: Without dead ends: 268 [2021-07-09 17:39:24,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 649.9ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:39:24,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-07-09 17:39:24,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 230. [2021-07-09 17:39:24,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1965065502183405) internal successors, (503), 229 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 503 transitions. [2021-07-09 17:39:24,604 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 503 transitions. Word has length 20 [2021-07-09 17:39:24,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:24,605 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 503 transitions. [2021-07-09 17:39:24,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:24,605 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 503 transitions. [2021-07-09 17:39:24,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:24,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:24,605 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:24,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3541,710 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:24,805 INFO L430 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:24,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:24,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1670680350, now seen corresponding path program 710 times [2021-07-09 17:39:24,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:24,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488887537] [2021-07-09 17:39:24,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:25,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:25,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:25,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488887537] [2021-07-09 17:39:25,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488887537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:25,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657474469] [2021-07-09 17:39:25,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:25,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:25,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:25,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:39:25,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:25,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:25,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:25,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:25,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:25,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:25,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:25,200 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:25,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:25,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:25,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:25,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:25,223 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:25,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:25,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:25,227 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:25,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:25,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:25,247 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:39:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:25,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657474469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:25,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:25,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:25,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248282488] [2021-07-09 17:39:25,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:25,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:25,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:25,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:25,327 INFO L87 Difference]: Start difference. First operand 230 states and 503 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:25,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:25,878 INFO L93 Difference]: Finished difference Result 269 states and 582 transitions. [2021-07-09 17:39:25,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:39:25,878 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:25,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:25,879 INFO L225 Difference]: With dead ends: 269 [2021-07-09 17:39:25,879 INFO L226 Difference]: Without dead ends: 260 [2021-07-09 17:39:25,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 649.2ms TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:39:25,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-07-09 17:39:25,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 230. [2021-07-09 17:39:25,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1965065502183405) internal successors, (503), 229 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:25,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 503 transitions. [2021-07-09 17:39:25,881 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 503 transitions. Word has length 20 [2021-07-09 17:39:25,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:25,881 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 503 transitions. [2021-07-09 17:39:25,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:25,881 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 503 transitions. [2021-07-09 17:39:25,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:25,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:25,881 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:26,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3546,711 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:26,082 INFO L430 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:26,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:26,082 INFO L82 PathProgramCache]: Analyzing trace with hash 367594418, now seen corresponding path program 711 times [2021-07-09 17:39:26,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:26,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393147681] [2021-07-09 17:39:26,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:26,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:26,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393147681] [2021-07-09 17:39:26,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393147681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:26,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323606727] [2021-07-09 17:39:26,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:26,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:39:26,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:26,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:26,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:26,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:26,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:26,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:26,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:26,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:26,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:26,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:26,486 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:39:26,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:26,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:26,489 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:26,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:26,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:26,496 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:26,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323606727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:26,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:26,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:39:26,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819033911] [2021-07-09 17:39:26,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:39:26,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:26,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:39:26,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:26,537 INFO L87 Difference]: Start difference. First operand 230 states and 503 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:26,782 INFO L93 Difference]: Finished difference Result 268 states and 563 transitions. [2021-07-09 17:39:26,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:39:26,783 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:26,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:26,783 INFO L225 Difference]: With dead ends: 268 [2021-07-09 17:39:26,783 INFO L226 Difference]: Without dead ends: 237 [2021-07-09 17:39:26,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 411.1ms TimeCoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:39:26,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-09 17:39:26,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2021-07-09 17:39:26,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.1931330472103006) internal successors, (511), 233 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:26,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 511 transitions. [2021-07-09 17:39:26,785 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 511 transitions. Word has length 20 [2021-07-09 17:39:26,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:26,785 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 511 transitions. [2021-07-09 17:39:26,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:26,785 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 511 transitions. [2021-07-09 17:39:26,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:26,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:26,785 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:26,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 712 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3549 [2021-07-09 17:39:26,986 INFO L430 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:26,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:26,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1319947626, now seen corresponding path program 712 times [2021-07-09 17:39:26,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:26,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257027034] [2021-07-09 17:39:26,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:27,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:27,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257027034] [2021-07-09 17:39:27,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257027034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:27,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203039540] [2021-07-09 17:39:27,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:27,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:27,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:27,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:27,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:27,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:27,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:27,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:27,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:27,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:27,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:27,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:27,450 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-07-09 17:39:27,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:27,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:39:27,452 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:27,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:27,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:27,459 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:27,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203039540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:27,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:27,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:27,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614974152] [2021-07-09 17:39:27,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:27,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:27,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:27,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:27,499 INFO L87 Difference]: Start difference. First operand 234 states and 511 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:27,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:27,809 INFO L93 Difference]: Finished difference Result 255 states and 544 transitions. [2021-07-09 17:39:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:39:27,810 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:27,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:27,810 INFO L225 Difference]: With dead ends: 255 [2021-07-09 17:39:27,810 INFO L226 Difference]: Without dead ends: 239 [2021-07-09 17:39:27,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 523.1ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:39:27,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-07-09 17:39:27,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2021-07-09 17:39:27,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1923076923076925) internal successors, (513), 234 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:27,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 513 transitions. [2021-07-09 17:39:27,812 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 513 transitions. Word has length 20 [2021-07-09 17:39:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:27,812 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 513 transitions. [2021-07-09 17:39:27,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 513 transitions. [2021-07-09 17:39:27,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:27,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:27,813 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:28,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 713 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3550 [2021-07-09 17:39:28,013 INFO L430 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:28,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:28,013 INFO L82 PathProgramCache]: Analyzing trace with hash -2113014606, now seen corresponding path program 713 times [2021-07-09 17:39:28,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:28,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579556748] [2021-07-09 17:39:28,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:28,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:28,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579556748] [2021-07-09 17:39:28,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579556748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:28,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631483223] [2021-07-09 17:39:28,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:28,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:39:28,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:28,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:28,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:28,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:28,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:28,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:28,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:28,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:28,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:28,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:28,456 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-07-09 17:39:28,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:28,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:39:28,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:28,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:28,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:28,465 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:28,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631483223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:28,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:28,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:28,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920203572] [2021-07-09 17:39:28,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:28,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:28,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:28,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:28,507 INFO L87 Difference]: Start difference. First operand 235 states and 513 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:28,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:28,971 INFO L93 Difference]: Finished difference Result 265 states and 565 transitions. [2021-07-09 17:39:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:39:28,971 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:28,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:28,972 INFO L225 Difference]: With dead ends: 265 [2021-07-09 17:39:28,972 INFO L226 Difference]: Without dead ends: 246 [2021-07-09 17:39:28,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 592.5ms TimeCoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:39:28,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-07-09 17:39:28,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2021-07-09 17:39:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.1914893617021276) internal successors, (515), 235 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:28,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 515 transitions. [2021-07-09 17:39:28,974 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 515 transitions. Word has length 20 [2021-07-09 17:39:28,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:28,974 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 515 transitions. [2021-07-09 17:39:28,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:28,974 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 515 transitions. [2021-07-09 17:39:28,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:28,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:28,974 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:29,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 714 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3551 [2021-07-09 17:39:29,175 INFO L430 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:29,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:29,175 INFO L82 PathProgramCache]: Analyzing trace with hash -976829334, now seen corresponding path program 714 times [2021-07-09 17:39:29,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:29,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050353389] [2021-07-09 17:39:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:29,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:29,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050353389] [2021-07-09 17:39:29,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050353389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:29,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960960502] [2021-07-09 17:39:29,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:29,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:39:29,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:29,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:29,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:29,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:29,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:29,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:29,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:29,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:29,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:29,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:29,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:29,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:29,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:29,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:29,568 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:29,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:29,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:29,571 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:29,622 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-07-09 17:39:29,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:29,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:29,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:29,626 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:29,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:29,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:29,630 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:29,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:29,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:29,652 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:39:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:29,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960960502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:29,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:29,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:39:29,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977568686] [2021-07-09 17:39:29,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:39:29,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:29,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:39:29,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:29,726 INFO L87 Difference]: Start difference. First operand 236 states and 515 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:30,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:30,128 INFO L93 Difference]: Finished difference Result 262 states and 557 transitions. [2021-07-09 17:39:30,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:39:30,129 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:30,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:30,129 INFO L225 Difference]: With dead ends: 262 [2021-07-09 17:39:30,129 INFO L226 Difference]: Without dead ends: 247 [2021-07-09 17:39:30,129 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 562.6ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:39:30,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-09 17:39:30,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 233. [2021-07-09 17:39:30,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.1939655172413794) internal successors, (509), 232 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:30,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 509 transitions. [2021-07-09 17:39:30,131 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 509 transitions. Word has length 20 [2021-07-09 17:39:30,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:30,131 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 509 transitions. [2021-07-09 17:39:30,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:30,131 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 509 transitions. [2021-07-09 17:39:30,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:30,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:30,132 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:30,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3552,715 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:30,332 INFO L430 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:30,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:30,332 INFO L82 PathProgramCache]: Analyzing trace with hash 434149346, now seen corresponding path program 715 times [2021-07-09 17:39:30,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:30,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502387979] [2021-07-09 17:39:30,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:30,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:30,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502387979] [2021-07-09 17:39:30,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502387979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:30,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006790896] [2021-07-09 17:39:30,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:30,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:30,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:30,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:30,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:30,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:30,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:30,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:30,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:30,693 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:30,714 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-07-09 17:39:30,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:30,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:39:30,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:30,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:30,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:30,727 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:30,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006790896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:30,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:30,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:30,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825162271] [2021-07-09 17:39:30,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:30,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:30,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:30,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:30,767 INFO L87 Difference]: Start difference. First operand 233 states and 509 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:31,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:31,019 INFO L93 Difference]: Finished difference Result 255 states and 544 transitions. [2021-07-09 17:39:31,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:39:31,019 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:31,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:31,019 INFO L225 Difference]: With dead ends: 255 [2021-07-09 17:39:31,019 INFO L226 Difference]: Without dead ends: 239 [2021-07-09 17:39:31,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 409.5ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:39:31,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-07-09 17:39:31,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2021-07-09 17:39:31,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1923076923076925) internal successors, (513), 234 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:31,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 513 transitions. [2021-07-09 17:39:31,021 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 513 transitions. Word has length 20 [2021-07-09 17:39:31,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:31,021 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 513 transitions. [2021-07-09 17:39:31,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:31,021 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 513 transitions. [2021-07-09 17:39:31,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:31,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:31,022 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:31,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3555,716 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:31,222 INFO L430 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:31,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:31,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1296154410, now seen corresponding path program 716 times [2021-07-09 17:39:31,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:31,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560161450] [2021-07-09 17:39:31,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:31,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:31,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560161450] [2021-07-09 17:39:31,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560161450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:31,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451339140] [2021-07-09 17:39:31,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:31,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:31,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:31,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:39:31,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:31,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:31,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:31,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:31,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:31,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:31,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:39:31,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:31,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:31,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:31,628 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:39:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:31,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451339140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:31,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:31,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:39:31,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287838335] [2021-07-09 17:39:31,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:39:31,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:31,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:39:31,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:31,663 INFO L87 Difference]: Start difference. First operand 235 states and 513 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:32,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:32,104 INFO L93 Difference]: Finished difference Result 258 states and 558 transitions. [2021-07-09 17:39:32,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:39:32,104 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:32,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:32,105 INFO L225 Difference]: With dead ends: 258 [2021-07-09 17:39:32,105 INFO L226 Difference]: Without dead ends: 251 [2021-07-09 17:39:32,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 539.6ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:39:32,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-07-09 17:39:32,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 236. [2021-07-09 17:39:32,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.195744680851064) internal successors, (516), 235 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 516 transitions. [2021-07-09 17:39:32,107 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 516 transitions. Word has length 20 [2021-07-09 17:39:32,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:32,107 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 516 transitions. [2021-07-09 17:39:32,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 516 transitions. [2021-07-09 17:39:32,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:32,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:32,107 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:32,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3556,717 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:32,308 INFO L430 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:32,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:32,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1862627614, now seen corresponding path program 717 times [2021-07-09 17:39:32,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:32,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882439669] [2021-07-09 17:39:32,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:32,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:32,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882439669] [2021-07-09 17:39:32,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882439669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:32,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71318965] [2021-07-09 17:39:32,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:32,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:39:32,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:32,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:32,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:32,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:32,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:32,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:32,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:32,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:32,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:32,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:32,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:32,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:32,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:32,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:32,677 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:32,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:32,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:32,680 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:32,731 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-07-09 17:39:32,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:32,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:32,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:32,735 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:32,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:32,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:32,738 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:32,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:32,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:32,761 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:39:32,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:32,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71318965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:32,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:32,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:32,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040569535] [2021-07-09 17:39:32,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:32,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:32,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:32,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:32,843 INFO L87 Difference]: Start difference. First operand 236 states and 516 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:33,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:33,468 INFO L93 Difference]: Finished difference Result 292 states and 608 transitions. [2021-07-09 17:39:33,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:39:33,468 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:33,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:33,468 INFO L225 Difference]: With dead ends: 292 [2021-07-09 17:39:33,468 INFO L226 Difference]: Without dead ends: 270 [2021-07-09 17:39:33,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 713.9ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:39:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-07-09 17:39:33,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 234. [2021-07-09 17:39:33,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.1931330472103006) internal successors, (511), 233 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 511 transitions. [2021-07-09 17:39:33,471 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 511 transitions. Word has length 20 [2021-07-09 17:39:33,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:33,471 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 511 transitions. [2021-07-09 17:39:33,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:33,471 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 511 transitions. [2021-07-09 17:39:33,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:33,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:33,471 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:33,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,718 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:33,671 INFO L430 AbstractCegarLoop]: === Iteration 724 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:33,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:33,672 INFO L82 PathProgramCache]: Analyzing trace with hash -810629710, now seen corresponding path program 718 times [2021-07-09 17:39:33,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:33,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911957584] [2021-07-09 17:39:33,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:33,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:33,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911957584] [2021-07-09 17:39:33,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911957584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:33,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062497452] [2021-07-09 17:39:33,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:33,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:33,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:33,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:33,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:34,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:34,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:34,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:34,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:34,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:34,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:34,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:34,051 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-07-09 17:39:34,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:34,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:39:34,054 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:34,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:34,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:34,060 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:34,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062497452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:34,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:34,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:34,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21592102] [2021-07-09 17:39:34,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:34,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:34,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:34,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:34,099 INFO L87 Difference]: Start difference. First operand 234 states and 511 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:34,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:34,457 INFO L93 Difference]: Finished difference Result 259 states and 557 transitions. [2021-07-09 17:39:34,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:39:34,457 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:34,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:34,458 INFO L225 Difference]: With dead ends: 259 [2021-07-09 17:39:34,458 INFO L226 Difference]: Without dead ends: 246 [2021-07-09 17:39:34,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 444.0ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:39:34,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-07-09 17:39:34,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2021-07-09 17:39:34,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.1914893617021276) internal successors, (515), 235 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:34,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 515 transitions. [2021-07-09 17:39:34,460 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 515 transitions. Word has length 20 [2021-07-09 17:39:34,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:34,460 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 515 transitions. [2021-07-09 17:39:34,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:34,460 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 515 transitions. [2021-07-09 17:39:34,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:34,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:34,460 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:34,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 719 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3560 [2021-07-09 17:39:34,661 INFO L430 AbstractCegarLoop]: === Iteration 725 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:34,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:34,661 INFO L82 PathProgramCache]: Analyzing trace with hash 325555562, now seen corresponding path program 719 times [2021-07-09 17:39:34,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:34,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934732044] [2021-07-09 17:39:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:34,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:34,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934732044] [2021-07-09 17:39:34,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934732044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:34,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880543686] [2021-07-09 17:39:34,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:34,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:39:34,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:34,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:34,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:34,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:34,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:34,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:34,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:34,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:34,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:34,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:34,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:34,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:34,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:34,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:34,979 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:34,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:34,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:34,982 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:35,033 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-07-09 17:39:35,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:35,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:35,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:35,037 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:35,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:35,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:35,041 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:35,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:35,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:35,062 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:39:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:35,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880543686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:35,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:35,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:39:35,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346917279] [2021-07-09 17:39:35,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:39:35,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:35,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:39:35,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:35,132 INFO L87 Difference]: Start difference. First operand 236 states and 515 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:35,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:35,502 INFO L93 Difference]: Finished difference Result 260 states and 553 transitions. [2021-07-09 17:39:35,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:39:35,502 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:35,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:35,502 INFO L225 Difference]: With dead ends: 260 [2021-07-09 17:39:35,502 INFO L226 Difference]: Without dead ends: 245 [2021-07-09 17:39:35,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 444.3ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:39:35,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-09 17:39:35,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 232. [2021-07-09 17:39:35,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.1948051948051948) internal successors, (507), 231 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:35,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 507 transitions. [2021-07-09 17:39:35,505 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 507 transitions. Word has length 20 [2021-07-09 17:39:35,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:35,505 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 507 transitions. [2021-07-09 17:39:35,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:35,505 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 507 transitions. [2021-07-09 17:39:35,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:35,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:35,505 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:35,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3561,720 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:35,705 INFO L430 AbstractCegarLoop]: === Iteration 726 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:35,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:35,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1820615198, now seen corresponding path program 720 times [2021-07-09 17:39:35,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:35,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271789504] [2021-07-09 17:39:35,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:35,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:35,924 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:35,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:35,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271789504] [2021-07-09 17:39:35,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271789504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:35,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442351175] [2021-07-09 17:39:35,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:35,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:39:35,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:35,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:35,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:36,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:36,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:36,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:36,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:36,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:36,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:36,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:36,162 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:39:36,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:36,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:36,166 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:36,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:36,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:36,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:36,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:36,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:36,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:36,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:36,215 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:36,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:36,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:36,235 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:39:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:36,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442351175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:36,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:36,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:36,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173811095] [2021-07-09 17:39:36,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:36,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:36,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:36,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:36,312 INFO L87 Difference]: Start difference. First operand 232 states and 507 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:36,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:36,734 INFO L93 Difference]: Finished difference Result 301 states and 634 transitions. [2021-07-09 17:39:36,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:39:36,734 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:36,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:36,735 INFO L225 Difference]: With dead ends: 301 [2021-07-09 17:39:36,735 INFO L226 Difference]: Without dead ends: 282 [2021-07-09 17:39:36,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 543.1ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:39:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-07-09 17:39:36,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 232. [2021-07-09 17:39:36,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.1948051948051948) internal successors, (507), 231 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 507 transitions. [2021-07-09 17:39:36,737 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 507 transitions. Word has length 20 [2021-07-09 17:39:36,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:36,737 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 507 transitions. [2021-07-09 17:39:36,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:36,737 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 507 transitions. [2021-07-09 17:39:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:36,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:36,738 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:36,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3564,721 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:36,938 INFO L430 AbstractCegarLoop]: === Iteration 727 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:36,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:36,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1255793558, now seen corresponding path program 721 times [2021-07-09 17:39:36,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:36,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214484279] [2021-07-09 17:39:36,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:37,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:37,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214484279] [2021-07-09 17:39:37,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214484279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:37,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167425701] [2021-07-09 17:39:37,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:37,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:37,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:37,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:37,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:37,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:37,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:37,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:37,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:37,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:37,275 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:39:37,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:37,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:37,278 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:37,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:37,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:37,285 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:37,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167425701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:37,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:37,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:39:37,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130547898] [2021-07-09 17:39:37,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:39:37,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:37,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:39:37,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:37,322 INFO L87 Difference]: Start difference. First operand 232 states and 507 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:37,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:37,693 INFO L93 Difference]: Finished difference Result 259 states and 556 transitions. [2021-07-09 17:39:37,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:39:37,693 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:37,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:37,694 INFO L225 Difference]: With dead ends: 259 [2021-07-09 17:39:37,694 INFO L226 Difference]: Without dead ends: 243 [2021-07-09 17:39:37,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 457.6ms TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:39:37,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-07-09 17:39:37,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 235. [2021-07-09 17:39:37,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1923076923076925) internal successors, (513), 234 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:37,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 513 transitions. [2021-07-09 17:39:37,696 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 513 transitions. Word has length 20 [2021-07-09 17:39:37,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:37,696 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 513 transitions. [2021-07-09 17:39:37,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:37,696 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 513 transitions. [2021-07-09 17:39:37,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:37,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:37,696 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:37,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3569,722 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:37,897 INFO L430 AbstractCegarLoop]: === Iteration 728 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:37,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:37,897 INFO L82 PathProgramCache]: Analyzing trace with hash -393788494, now seen corresponding path program 722 times [2021-07-09 17:39:37,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:37,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324196944] [2021-07-09 17:39:37,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:38,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:38,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324196944] [2021-07-09 17:39:38,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324196944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:38,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329133910] [2021-07-09 17:39:38,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:38,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:38,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:38,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:39:38,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:38,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:38,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:38,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:38,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:38,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:38,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:39:38,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:38,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:38,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:38,263 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:39:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:38,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329133910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:38,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:38,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:39:38,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085410895] [2021-07-09 17:39:38,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:39:38,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:38,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:39:38,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:39:38,281 INFO L87 Difference]: Start difference. First operand 235 states and 513 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:38,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:38,585 INFO L93 Difference]: Finished difference Result 252 states and 542 transitions. [2021-07-09 17:39:38,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:39:38,585 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:38,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:38,586 INFO L225 Difference]: With dead ends: 252 [2021-07-09 17:39:38,586 INFO L226 Difference]: Without dead ends: 245 [2021-07-09 17:39:38,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 431.3ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:39:38,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-09 17:39:38,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 236. [2021-07-09 17:39:38,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.195744680851064) internal successors, (516), 235 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:38,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 516 transitions. [2021-07-09 17:39:38,588 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 516 transitions. Word has length 20 [2021-07-09 17:39:38,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:38,588 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 516 transitions. [2021-07-09 17:39:38,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:38,588 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 516 transitions. [2021-07-09 17:39:38,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:38,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:38,588 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:38,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 723 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3570 [2021-07-09 17:39:38,789 INFO L430 AbstractCegarLoop]: === Iteration 729 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:38,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:38,789 INFO L82 PathProgramCache]: Analyzing trace with hash 742396778, now seen corresponding path program 723 times [2021-07-09 17:39:38,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:38,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234945481] [2021-07-09 17:39:38,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:39,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:39,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234945481] [2021-07-09 17:39:39,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234945481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:39,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953224114] [2021-07-09 17:39:39,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:39,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:39:39,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:39,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:39,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:39,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:39,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:39,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:39,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:39,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:39,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:39,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:39,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:39,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:39,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:39,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:39,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:39,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:39,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:39,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:39,237 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-07-09 17:39:39,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:39,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:39,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:39,241 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:39,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:39,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:39,245 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:39,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:39,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:39,267 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:39:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:39,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953224114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:39,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:39,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:39,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85851715] [2021-07-09 17:39:39,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:39,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:39,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:39,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:39,344 INFO L87 Difference]: Start difference. First operand 236 states and 516 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:39,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:39,889 INFO L93 Difference]: Finished difference Result 281 states and 588 transitions. [2021-07-09 17:39:39,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:39:39,889 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:39,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:39,890 INFO L225 Difference]: With dead ends: 281 [2021-07-09 17:39:39,890 INFO L226 Difference]: Without dead ends: 262 [2021-07-09 17:39:39,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 705.7ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:39:39,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-09 17:39:39,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 234. [2021-07-09 17:39:39,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.1931330472103006) internal successors, (511), 233 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:39,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 511 transitions. [2021-07-09 17:39:39,892 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 511 transitions. Word has length 20 [2021-07-09 17:39:39,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:39,892 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 511 transitions. [2021-07-09 17:39:39,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:39,892 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 511 transitions. [2021-07-09 17:39:39,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:39,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:39,893 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:40,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 724 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3571 [2021-07-09 17:39:40,093 INFO L430 AbstractCegarLoop]: === Iteration 730 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:40,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:40,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1794394682, now seen corresponding path program 724 times [2021-07-09 17:39:40,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:40,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318509312] [2021-07-09 17:39:40,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:40,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:40,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318509312] [2021-07-09 17:39:40,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318509312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:40,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186535520] [2021-07-09 17:39:40,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:40,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:40,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:40,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:40,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:40,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:40,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:40,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:40,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:40,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:40,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:40,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:40,486 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:39:40,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:40,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:40,489 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:40,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:40,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:40,497 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:40,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186535520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:40,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:40,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:40,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682753586] [2021-07-09 17:39:40,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:40,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:40,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:40,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:40,535 INFO L87 Difference]: Start difference. First operand 234 states and 511 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:40,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:40,857 INFO L93 Difference]: Finished difference Result 255 states and 548 transitions. [2021-07-09 17:39:40,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:39:40,857 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:40,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:40,858 INFO L225 Difference]: With dead ends: 255 [2021-07-09 17:39:40,858 INFO L226 Difference]: Without dead ends: 242 [2021-07-09 17:39:40,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 469.7ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:39:40,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-07-09 17:39:40,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 236. [2021-07-09 17:39:40,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.1914893617021276) internal successors, (515), 235 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 515 transitions. [2021-07-09 17:39:40,860 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 515 transitions. Word has length 20 [2021-07-09 17:39:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:40,860 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 515 transitions. [2021-07-09 17:39:40,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 515 transitions. [2021-07-09 17:39:40,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:40,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:40,860 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:41,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3574,725 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:41,061 INFO L430 AbstractCegarLoop]: === Iteration 731 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:41,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1364387342, now seen corresponding path program 725 times [2021-07-09 17:39:41,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:41,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004096084] [2021-07-09 17:39:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:41,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:41,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004096084] [2021-07-09 17:39:41,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004096084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:41,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907148872] [2021-07-09 17:39:41,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:41,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:39:41,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:41,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:41,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:41,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:41,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:41,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:41,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:41,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:41,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:41,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:41,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:41,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:41,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:41,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:41,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:41,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:41,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:41,375 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:41,443 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-07-09 17:39:41,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:41,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:41,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:41,447 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:41,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:41,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:41,450 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:41,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:41,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:41,473 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:39:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:41,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907148872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:41,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:41,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:39:41,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161557110] [2021-07-09 17:39:41,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:39:41,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:41,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:39:41,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:41,545 INFO L87 Difference]: Start difference. First operand 236 states and 515 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:41,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:41,864 INFO L93 Difference]: Finished difference Result 252 states and 540 transitions. [2021-07-09 17:39:41,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:41,864 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:41,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:41,865 INFO L225 Difference]: With dead ends: 252 [2021-07-09 17:39:41,865 INFO L226 Difference]: Without dead ends: 240 [2021-07-09 17:39:41,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 480.4ms TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:39:41,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-07-09 17:39:41,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 235. [2021-07-09 17:39:41,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1923076923076925) internal successors, (513), 234 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:41,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 513 transitions. [2021-07-09 17:39:41,867 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 513 transitions. Word has length 20 [2021-07-09 17:39:41,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:41,867 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 513 transitions. [2021-07-09 17:39:41,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:41,867 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 513 transitions. [2021-07-09 17:39:41,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:41,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:41,867 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:42,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3575,726 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:42,068 INFO L430 AbstractCegarLoop]: === Iteration 732 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:42,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:42,068 INFO L82 PathProgramCache]: Analyzing trace with hash 784409194, now seen corresponding path program 726 times [2021-07-09 17:39:42,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:42,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065080575] [2021-07-09 17:39:42,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:42,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:42,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:42,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065080575] [2021-07-09 17:39:42,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065080575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:42,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207683061] [2021-07-09 17:39:42,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:42,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:39:42,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:42,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:39:42,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:42,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:42,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:42,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:42,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:42,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:42,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:42,436 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:42,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:42,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:42,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:42,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:42,459 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:42,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:42,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:42,463 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:42,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:42,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:42,483 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:39:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:42,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207683061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:42,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:42,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:42,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467259302] [2021-07-09 17:39:42,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:42,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:42,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:42,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:42,556 INFO L87 Difference]: Start difference. First operand 235 states and 513 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:42,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:42,905 INFO L93 Difference]: Finished difference Result 267 states and 578 transitions. [2021-07-09 17:39:42,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:39:42,905 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:42,906 INFO L225 Difference]: With dead ends: 267 [2021-07-09 17:39:42,906 INFO L226 Difference]: Without dead ends: 258 [2021-07-09 17:39:42,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 524.3ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:39:42,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-07-09 17:39:42,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 235. [2021-07-09 17:39:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1923076923076925) internal successors, (513), 234 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:42,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 513 transitions. [2021-07-09 17:39:42,908 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 513 transitions. Word has length 20 [2021-07-09 17:39:42,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:42,908 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 513 transitions. [2021-07-09 17:39:42,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:42,908 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 513 transitions. [2021-07-09 17:39:42,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:42,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:42,908 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:43,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3578,727 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:43,109 INFO L430 AbstractCegarLoop]: === Iteration 733 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:43,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:43,109 INFO L82 PathProgramCache]: Analyzing trace with hash 908596402, now seen corresponding path program 727 times [2021-07-09 17:39:43,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:43,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816016887] [2021-07-09 17:39:43,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:43,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:43,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816016887] [2021-07-09 17:39:43,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816016887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:43,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671559293] [2021-07-09 17:39:43,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:43,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:43,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:43,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:43,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:43,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:43,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:43,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:43,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:43,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:43,499 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-07-09 17:39:43,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:43,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:39:43,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:43,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:43,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:43,508 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:43,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671559293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:43,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:43,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:39:43,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994208018] [2021-07-09 17:39:43,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:39:43,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:43,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:39:43,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:43,544 INFO L87 Difference]: Start difference. First operand 235 states and 513 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:43,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:43,862 INFO L93 Difference]: Finished difference Result 263 states and 564 transitions. [2021-07-09 17:39:43,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:39:43,863 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:43,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:43,863 INFO L225 Difference]: With dead ends: 263 [2021-07-09 17:39:43,863 INFO L226 Difference]: Without dead ends: 250 [2021-07-09 17:39:43,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 425.7ms TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:39:43,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-07-09 17:39:43,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 238. [2021-07-09 17:39:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.189873417721519) internal successors, (519), 237 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:43,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 519 transitions. [2021-07-09 17:39:43,865 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 519 transitions. Word has length 20 [2021-07-09 17:39:43,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:43,865 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 519 transitions. [2021-07-09 17:39:43,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:43,865 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 519 transitions. [2021-07-09 17:39:43,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:43,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:43,866 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:44,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 728 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3581 [2021-07-09 17:39:44,066 INFO L430 AbstractCegarLoop]: === Iteration 734 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:44,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:44,066 INFO L82 PathProgramCache]: Analyzing trace with hash 2044781674, now seen corresponding path program 728 times [2021-07-09 17:39:44,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:44,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073644885] [2021-07-09 17:39:44,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:44,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:44,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073644885] [2021-07-09 17:39:44,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073644885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:44,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203957820] [2021-07-09 17:39:44,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:44,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:44,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:44,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:39:44,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:44,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:44,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:44,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:44,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:44,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:44,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:44,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:44,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:44,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:44,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:44,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:44,477 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:44,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:44,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:44,480 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:44,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:44,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:44,500 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:39:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:44,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203957820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:44,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:44,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:44,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012568390] [2021-07-09 17:39:44,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:44,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:44,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:44,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:44,573 INFO L87 Difference]: Start difference. First operand 238 states and 519 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:45,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:45,141 INFO L93 Difference]: Finished difference Result 284 states and 598 transitions. [2021-07-09 17:39:45,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:39:45,141 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:45,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:45,142 INFO L225 Difference]: With dead ends: 284 [2021-07-09 17:39:45,142 INFO L226 Difference]: Without dead ends: 268 [2021-07-09 17:39:45,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 715.1ms TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:39:45,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-07-09 17:39:45,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 237. [2021-07-09 17:39:45,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.190677966101695) internal successors, (517), 236 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:45,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 517 transitions. [2021-07-09 17:39:45,144 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 517 transitions. Word has length 20 [2021-07-09 17:39:45,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:45,144 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 517 transitions. [2021-07-09 17:39:45,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:45,144 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 517 transitions. [2021-07-09 17:39:45,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:45,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:45,145 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:45,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 729 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3582 [2021-07-09 17:39:45,345 INFO L430 AbstractCegarLoop]: === Iteration 735 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:45,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:45,345 INFO L82 PathProgramCache]: Analyzing trace with hash -101389086, now seen corresponding path program 729 times [2021-07-09 17:39:45,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:45,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407470647] [2021-07-09 17:39:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:45,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:45,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407470647] [2021-07-09 17:39:45,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407470647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:45,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516957012] [2021-07-09 17:39:45,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:45,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:39:45,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:45,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:39:45,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:45,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:45,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:45,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:45,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:45,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:45,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:45,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:45,771 INFO L628 ElimStorePlain]: treesize reduction 78, result has 44.3 percent of original size [2021-07-09 17:39:45,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:45,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:45,774 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:45,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:45,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:45,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:45,796 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:45,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:45,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:45,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:45,817 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:45,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:45,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:45,835 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:153, output treesize:32 [2021-07-09 17:39:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:45,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516957012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:45,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:45,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:45,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271170553] [2021-07-09 17:39:45,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:45,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:45,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:45,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:45,909 INFO L87 Difference]: Start difference. First operand 237 states and 517 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:46,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:46,680 INFO L93 Difference]: Finished difference Result 312 states and 648 transitions. [2021-07-09 17:39:46,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:39:46,680 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:46,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:46,680 INFO L225 Difference]: With dead ends: 312 [2021-07-09 17:39:46,680 INFO L226 Difference]: Without dead ends: 286 [2021-07-09 17:39:46,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 874.0ms TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:39:46,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-07-09 17:39:46,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 237. [2021-07-09 17:39:46,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.190677966101695) internal successors, (517), 236 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:46,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 517 transitions. [2021-07-09 17:39:46,683 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 517 transitions. Word has length 20 [2021-07-09 17:39:46,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:46,683 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 517 transitions. [2021-07-09 17:39:46,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:46,683 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 517 transitions. [2021-07-09 17:39:46,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:46,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:46,683 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:46,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3585,730 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:46,884 INFO L430 AbstractCegarLoop]: === Iteration 736 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:46,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:46,884 INFO L82 PathProgramCache]: Analyzing trace with hash 2086794090, now seen corresponding path program 730 times [2021-07-09 17:39:46,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:46,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020013012] [2021-07-09 17:39:46,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:47,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:47,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020013012] [2021-07-09 17:39:47,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020013012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:47,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792864908] [2021-07-09 17:39:47,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:47,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:47,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:47,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:47,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:47,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:47,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:47,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:47,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:47,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:47,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:47,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:47,357 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:39:47,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:47,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:47,361 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:47,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:47,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:47,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:47,386 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:47,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:47,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:47,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:47,410 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:47,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:47,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:47,430 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:39:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:47,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792864908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:47,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:47,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:47,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91497131] [2021-07-09 17:39:47,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:47,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:47,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:47,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:47,510 INFO L87 Difference]: Start difference. First operand 237 states and 517 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:47,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:47,892 INFO L93 Difference]: Finished difference Result 297 states and 626 transitions. [2021-07-09 17:39:47,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:39:47,893 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:47,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:47,893 INFO L225 Difference]: With dead ends: 297 [2021-07-09 17:39:47,893 INFO L226 Difference]: Without dead ends: 278 [2021-07-09 17:39:47,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 572.3ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:39:47,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-07-09 17:39:47,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 237. [2021-07-09 17:39:47,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.190677966101695) internal successors, (517), 236 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 517 transitions. [2021-07-09 17:39:47,898 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 517 transitions. Word has length 20 [2021-07-09 17:39:47,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:47,898 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 517 transitions. [2021-07-09 17:39:47,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:47,898 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 517 transitions. [2021-07-09 17:39:47,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:47,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:47,898 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:48,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 731 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3590 [2021-07-09 17:39:48,098 INFO L430 AbstractCegarLoop]: === Iteration 737 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:48,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:48,099 INFO L82 PathProgramCache]: Analyzing trace with hash -2104416030, now seen corresponding path program 731 times [2021-07-09 17:39:48,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:48,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588055062] [2021-07-09 17:39:48,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:48,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:48,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588055062] [2021-07-09 17:39:48,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588055062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:48,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378973333] [2021-07-09 17:39:48,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:48,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:39:48,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:48,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:48,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:48,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:48,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:48,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:48,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:48,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:48,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:48,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:48,490 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:39:48,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:48,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:48,493 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:48,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:48,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:48,500 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:48,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378973333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:48,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:48,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:48,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627982112] [2021-07-09 17:39:48,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:48,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:48,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:48,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:48,539 INFO L87 Difference]: Start difference. First operand 237 states and 517 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:48,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:48,759 INFO L93 Difference]: Finished difference Result 264 states and 562 transitions. [2021-07-09 17:39:48,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:39:48,760 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:48,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:48,760 INFO L225 Difference]: With dead ends: 264 [2021-07-09 17:39:48,760 INFO L226 Difference]: Without dead ends: 248 [2021-07-09 17:39:48,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 387.0ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:39:48,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-07-09 17:39:48,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 241. [2021-07-09 17:39:48,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.1875) internal successors, (525), 240 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:48,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 525 transitions. [2021-07-09 17:39:48,764 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 525 transitions. Word has length 20 [2021-07-09 17:39:48,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:48,765 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 525 transitions. [2021-07-09 17:39:48,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:48,765 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 525 transitions. [2021-07-09 17:39:48,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:48,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:48,765 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:48,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 732 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3595 [2021-07-09 17:39:48,965 INFO L430 AbstractCegarLoop]: === Iteration 738 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:48,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:48,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1242410966, now seen corresponding path program 732 times [2021-07-09 17:39:48,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:48,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546796390] [2021-07-09 17:39:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:49,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:49,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546796390] [2021-07-09 17:39:49,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546796390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:49,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833838254] [2021-07-09 17:39:49,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 733 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 733 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:49,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:39:49,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:49,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:49,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:49,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:49,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:49,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:49,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:49,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:49,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:49,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:49,359 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-07-09 17:39:49,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:49,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:39:49,362 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:49,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:49,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:49,369 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:49,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833838254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:49,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:49,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:49,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184381582] [2021-07-09 17:39:49,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:49,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:49,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:49,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:49,408 INFO L87 Difference]: Start difference. First operand 241 states and 525 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:49,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:49,825 INFO L93 Difference]: Finished difference Result 266 states and 570 transitions. [2021-07-09 17:39:49,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:39:49,825 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:49,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:49,826 INFO L225 Difference]: With dead ends: 266 [2021-07-09 17:39:49,826 INFO L226 Difference]: Without dead ends: 253 [2021-07-09 17:39:49,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 500.9ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:39:49,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-07-09 17:39:49,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 242. [2021-07-09 17:39:49,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:49,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-07-09 17:39:49,828 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-07-09 17:39:49,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:49,828 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-07-09 17:39:49,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-07-09 17:39:49,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:49,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:49,828 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:50,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3596,733 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:50,029 INFO L430 AbstractCegarLoop]: === Iteration 739 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:50,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:50,029 INFO L82 PathProgramCache]: Analyzing trace with hash -106225694, now seen corresponding path program 733 times [2021-07-09 17:39:50,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:50,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048100304] [2021-07-09 17:39:50,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:50,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:50,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048100304] [2021-07-09 17:39:50,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048100304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:50,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641135698] [2021-07-09 17:39:50,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:50,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:50,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:50,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:50,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:50,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:50,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:50,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:50,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:50,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:50,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:50,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:50,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:50,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:50,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:50,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:50,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:50,348 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:50,401 INFO L628 ElimStorePlain]: treesize reduction 77, result has 47.6 percent of original size [2021-07-09 17:39:50,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:50,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:50,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:50,405 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:50,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:50,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:50,408 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:50,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:50,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:50,432 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:39:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:50,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641135698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:50,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:50,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:39:50,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743806239] [2021-07-09 17:39:50,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:39:50,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:50,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:39:50,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:50,514 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:50,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:50,930 INFO L93 Difference]: Finished difference Result 287 states and 601 transitions. [2021-07-09 17:39:50,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:39:50,930 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:50,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:50,930 INFO L225 Difference]: With dead ends: 287 [2021-07-09 17:39:50,930 INFO L226 Difference]: Without dead ends: 268 [2021-07-09 17:39:50,931 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 473.4ms TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:39:50,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-07-09 17:39:50,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 240. [2021-07-09 17:39:50,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.188284518828452) internal successors, (523), 239 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 523 transitions. [2021-07-09 17:39:50,933 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 523 transitions. Word has length 20 [2021-07-09 17:39:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:50,933 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 523 transitions. [2021-07-09 17:39:50,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:50,933 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 523 transitions. [2021-07-09 17:39:50,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:50,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:50,933 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:51,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3597,734 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:51,141 INFO L430 AbstractCegarLoop]: === Iteration 740 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:51,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:51,141 INFO L82 PathProgramCache]: Analyzing trace with hash 945772210, now seen corresponding path program 734 times [2021-07-09 17:39:51,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:51,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350222553] [2021-07-09 17:39:51,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:51,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:51,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350222553] [2021-07-09 17:39:51,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350222553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:51,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903034653] [2021-07-09 17:39:51,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 735 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 735 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:51,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:51,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:51,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:39:51,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:51,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:51,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:51,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:51,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:51,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:51,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:39:51,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:51,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:51,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:51,488 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:39:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:51,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903034653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:51,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:51,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:51,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329275446] [2021-07-09 17:39:51,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:51,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:51,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:51,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:51,525 INFO L87 Difference]: Start difference. First operand 240 states and 523 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:51,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:51,889 INFO L93 Difference]: Finished difference Result 266 states and 573 transitions. [2021-07-09 17:39:51,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:39:51,890 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:51,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:51,890 INFO L225 Difference]: With dead ends: 266 [2021-07-09 17:39:51,890 INFO L226 Difference]: Without dead ends: 259 [2021-07-09 17:39:51,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 442.8ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:39:51,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-07-09 17:39:51,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 242. [2021-07-09 17:39:51,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.190871369294606) internal successors, (528), 241 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:51,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 528 transitions. [2021-07-09 17:39:51,892 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 528 transitions. Word has length 20 [2021-07-09 17:39:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:51,892 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 528 transitions. [2021-07-09 17:39:51,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:51,892 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 528 transitions. [2021-07-09 17:39:51,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:51,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:51,893 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:52,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3600,735 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:52,093 INFO L430 AbstractCegarLoop]: === Iteration 741 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:52,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:52,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2081957482, now seen corresponding path program 735 times [2021-07-09 17:39:52,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:52,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462845647] [2021-07-09 17:39:52,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:52,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:52,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462845647] [2021-07-09 17:39:52,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462845647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:52,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370785664] [2021-07-09 17:39:52,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:52,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:39:52,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:52,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:52,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:52,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:52,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:52,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:52,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:52,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:52,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:52,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:52,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:52,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:52,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:52,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:52,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:52,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:52,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:52,487 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:52,538 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-07-09 17:39:52,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:52,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:52,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:52,542 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:52,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:52,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:52,545 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:52,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:52,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:52,567 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:39:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:52,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370785664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:52,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:52,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:39:52,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289809694] [2021-07-09 17:39:52,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:39:52,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:52,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:39:52,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:52,641 INFO L87 Difference]: Start difference. First operand 242 states and 528 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:53,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:53,122 INFO L93 Difference]: Finished difference Result 292 states and 610 transitions. [2021-07-09 17:39:53,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:39:53,123 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:53,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:53,123 INFO L225 Difference]: With dead ends: 292 [2021-07-09 17:39:53,123 INFO L226 Difference]: Without dead ends: 273 [2021-07-09 17:39:53,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 642.2ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:39:53,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-07-09 17:39:53,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 241. [2021-07-09 17:39:53,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.1875) internal successors, (525), 240 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:53,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 525 transitions. [2021-07-09 17:39:53,125 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 525 transitions. Word has length 20 [2021-07-09 17:39:53,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:53,125 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 525 transitions. [2021-07-09 17:39:53,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:53,125 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 525 transitions. [2021-07-09 17:39:53,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:53,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:53,126 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:53,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3601,736 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:53,326 INFO L430 AbstractCegarLoop]: === Iteration 742 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:53,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:53,326 INFO L82 PathProgramCache]: Analyzing trace with hash -64213278, now seen corresponding path program 736 times [2021-07-09 17:39:53,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:53,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549169127] [2021-07-09 17:39:53,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:53,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:53,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549169127] [2021-07-09 17:39:53,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549169127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:53,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774029270] [2021-07-09 17:39:53,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:53,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:53,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:53,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:53,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:53,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:53,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:53,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:53,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:53,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:53,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:53,693 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:53,753 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:39:53,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:53,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:53,757 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:53,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:53,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:53,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:53,783 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:53,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:53,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:53,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:53,808 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:53,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:53,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:53,832 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:39:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:53,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774029270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:53,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:53,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:53,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304770693] [2021-07-09 17:39:53,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:53,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:53,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:53,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:53,908 INFO L87 Difference]: Start difference. First operand 241 states and 525 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:54,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:54,436 INFO L93 Difference]: Finished difference Result 297 states and 626 transitions. [2021-07-09 17:39:54,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:39:54,436 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:54,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:54,437 INFO L225 Difference]: With dead ends: 297 [2021-07-09 17:39:54,437 INFO L226 Difference]: Without dead ends: 278 [2021-07-09 17:39:54,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 651.0ms TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:39:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-07-09 17:39:54,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 240. [2021-07-09 17:39:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.188284518828452) internal successors, (523), 239 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:54,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 523 transitions. [2021-07-09 17:39:54,439 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 523 transitions. Word has length 20 [2021-07-09 17:39:54,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:54,439 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 523 transitions. [2021-07-09 17:39:54,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:54,439 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 523 transitions. [2021-07-09 17:39:54,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:54,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:54,439 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:54,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3604,737 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:54,640 INFO L430 AbstractCegarLoop]: === Iteration 743 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:54,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:54,640 INFO L82 PathProgramCache]: Analyzing trace with hash 59973930, now seen corresponding path program 737 times [2021-07-09 17:39:54,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:54,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996486581] [2021-07-09 17:39:54,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:54,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:54,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996486581] [2021-07-09 17:39:54,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996486581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:54,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123429878] [2021-07-09 17:39:54,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 738 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 738 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:54,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:39:54,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:54,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:54,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:54,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:54,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:54,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:54,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:54,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:54,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:54,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:54,998 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-07-09 17:39:54,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:55,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:55,002 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:55,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:55,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:55,009 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:55,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123429878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:55,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:55,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:55,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503431637] [2021-07-09 17:39:55,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:55,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:55,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:55,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:55,048 INFO L87 Difference]: Start difference. First operand 240 states and 523 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:55,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:55,415 INFO L93 Difference]: Finished difference Result 268 states and 574 transitions. [2021-07-09 17:39:55,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:39:55,415 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:55,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:55,416 INFO L225 Difference]: With dead ends: 268 [2021-07-09 17:39:55,416 INFO L226 Difference]: Without dead ends: 255 [2021-07-09 17:39:55,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 378.8ms TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:39:55,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-09 17:39:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 243. [2021-07-09 17:39:55,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.1859504132231407) internal successors, (529), 242 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 529 transitions. [2021-07-09 17:39:55,418 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 529 transitions. Word has length 20 [2021-07-09 17:39:55,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:55,418 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 529 transitions. [2021-07-09 17:39:55,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:55,418 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 529 transitions. [2021-07-09 17:39:55,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:55,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:55,421 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:55,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 738 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3609 [2021-07-09 17:39:55,622 INFO L430 AbstractCegarLoop]: === Iteration 744 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:55,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:55,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1196159202, now seen corresponding path program 738 times [2021-07-09 17:39:55,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:55,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921804804] [2021-07-09 17:39:55,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:55,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:55,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921804804] [2021-07-09 17:39:55,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921804804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:55,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871437871] [2021-07-09 17:39:55,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 739 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 739 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:55,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:39:55,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:55,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:55,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:55,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:55,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:55,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:55,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:55,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:55,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:55,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:55,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:55,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:55,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:55,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:55,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:55,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:55,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:55,995 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:56,048 INFO L628 ElimStorePlain]: treesize reduction 77, result has 47.6 percent of original size [2021-07-09 17:39:56,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:56,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:56,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:56,052 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:56,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:56,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:56,055 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:56,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:56,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:56,078 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:39:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:56,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871437871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:56,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:56,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:56,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487787093] [2021-07-09 17:39:56,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:56,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:56,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:56,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:56,154 INFO L87 Difference]: Start difference. First operand 243 states and 529 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:56,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:56,543 INFO L93 Difference]: Finished difference Result 290 states and 607 transitions. [2021-07-09 17:39:56,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:39:56,543 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:56,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:56,543 INFO L225 Difference]: With dead ends: 290 [2021-07-09 17:39:56,543 INFO L226 Difference]: Without dead ends: 271 [2021-07-09 17:39:56,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 552.6ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:39:56,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-07-09 17:39:56,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 242. [2021-07-09 17:39:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:56,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-07-09 17:39:56,546 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-07-09 17:39:56,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:56,546 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-07-09 17:39:56,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:56,546 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-07-09 17:39:56,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:56,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:56,546 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:56,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3610,739 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:56,747 INFO L430 AbstractCegarLoop]: === Iteration 745 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:56,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:56,747 INFO L82 PathProgramCache]: Analyzing trace with hash -950011558, now seen corresponding path program 739 times [2021-07-09 17:39:56,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:56,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226418836] [2021-07-09 17:39:56,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:56,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:56,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226418836] [2021-07-09 17:39:56,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226418836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:56,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893097119] [2021-07-09 17:39:56,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 740 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 740 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:56,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:56,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:57,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:57,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:57,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:57,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:57,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:57,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:57,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:57,195 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-07-09 17:39:57,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:57,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:57,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:57,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:57,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:57,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:57,222 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:57,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:57,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:57,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:57,246 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:57,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:57,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:57,267 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:39:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:57,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893097119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:57,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:57,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:57,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423762650] [2021-07-09 17:39:57,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:57,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:57,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:57,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:57,344 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:57,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:57,991 INFO L93 Difference]: Finished difference Result 296 states and 624 transitions. [2021-07-09 17:39:57,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:39:57,992 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:57,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:57,992 INFO L225 Difference]: With dead ends: 296 [2021-07-09 17:39:57,992 INFO L226 Difference]: Without dead ends: 277 [2021-07-09 17:39:57,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 789.9ms TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:39:57,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-07-09 17:39:57,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 241. [2021-07-09 17:39:57,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.1875) internal successors, (525), 240 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:57,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 525 transitions. [2021-07-09 17:39:57,994 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 525 transitions. Word has length 20 [2021-07-09 17:39:57,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:57,994 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 525 transitions. [2021-07-09 17:39:57,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:57,994 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 525 transitions. [2021-07-09 17:39:57,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:57,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:57,995 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:58,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 740 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3613 [2021-07-09 17:39:58,195 INFO L430 AbstractCegarLoop]: === Iteration 746 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:58,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:58,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1238171618, now seen corresponding path program 740 times [2021-07-09 17:39:58,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:58,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681174320] [2021-07-09 17:39:58,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:58,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:58,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681174320] [2021-07-09 17:39:58,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681174320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:58,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878405871] [2021-07-09 17:39:58,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 741 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 741 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:58,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:58,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:58,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:39:58,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:58,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:58,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:58,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:58,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:58,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:58,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:39:58,561 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:58,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:58,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:58,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:58,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:58,584 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:58,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:58,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:39:58,587 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:58,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:58,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:39:58,607 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:39:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:58,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878405871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:58,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:58,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:58,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827930252] [2021-07-09 17:39:58,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:58,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:58,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:58,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:58,695 INFO L87 Difference]: Start difference. First operand 241 states and 525 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:59,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:59,375 INFO L93 Difference]: Finished difference Result 283 states and 610 transitions. [2021-07-09 17:39:59,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:39:59,376 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:59,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:59,376 INFO L225 Difference]: With dead ends: 283 [2021-07-09 17:39:59,376 INFO L226 Difference]: Without dead ends: 274 [2021-07-09 17:39:59,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 771.7ms TimeCoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:39:59,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-07-09 17:39:59,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 240. [2021-07-09 17:39:59,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.188284518828452) internal successors, (523), 239 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:59,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 523 transitions. [2021-07-09 17:39:59,378 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 523 transitions. Word has length 20 [2021-07-09 17:39:59,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:59,378 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 523 transitions. [2021-07-09 17:39:59,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:59,378 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 523 transitions. [2021-07-09 17:39:59,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:59,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:59,379 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:59,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3618,741 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:59,579 INFO L430 AbstractCegarLoop]: === Iteration 747 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:59,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:59,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1629968974, now seen corresponding path program 741 times [2021-07-09 17:39:59,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:59,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729118367] [2021-07-09 17:39:59,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:59,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:59,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729118367] [2021-07-09 17:39:59,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729118367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:59,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187157002] [2021-07-09 17:39:59,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 742 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 742 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:59,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:39:59,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:59,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:39:59,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:59,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:59,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:59,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:59,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:59,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:59,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:39:59,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:39:59,942 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:39:59,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:39:59,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:39:59,945 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:39:59,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:39:59,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:39:59,952 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:39:59,991 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:59,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187157002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:59,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:59,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:59,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15178695] [2021-07-09 17:39:59,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:59,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:59,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:59,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:59,991 INFO L87 Difference]: Start difference. First operand 240 states and 523 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:00,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:00,258 INFO L93 Difference]: Finished difference Result 270 states and 578 transitions. [2021-07-09 17:40:00,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:40:00,258 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:00,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:00,259 INFO L225 Difference]: With dead ends: 270 [2021-07-09 17:40:00,259 INFO L226 Difference]: Without dead ends: 257 [2021-07-09 17:40:00,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 381.9ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:40:00,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-07-09 17:40:00,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 244. [2021-07-09 17:40:00,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.185185185185185) internal successors, (531), 243 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:00,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 531 transitions. [2021-07-09 17:40:00,261 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 531 transitions. Word has length 20 [2021-07-09 17:40:00,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:00,261 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 531 transitions. [2021-07-09 17:40:00,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:00,261 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 531 transitions. [2021-07-09 17:40:00,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:00,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:00,261 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:00,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3621,742 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:00,462 INFO L430 AbstractCegarLoop]: === Iteration 748 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:00,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:00,462 INFO L82 PathProgramCache]: Analyzing trace with hash -493783702, now seen corresponding path program 742 times [2021-07-09 17:40:00,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:00,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802925323] [2021-07-09 17:40:00,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:00,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:00,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802925323] [2021-07-09 17:40:00,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802925323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:00,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56318710] [2021-07-09 17:40:00,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 743 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 743 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:00,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:00,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:00,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:00,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:00,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:00,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:00,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:00,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:00,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:00,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:00,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:00,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:00,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:00,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:00,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:00,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:00,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:00,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:00,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:00,885 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-07-09 17:40:00,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:00,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:00,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:00,889 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:00,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:00,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:00,893 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:00,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:00,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:00,915 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:40:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:00,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56318710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:00,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:00,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:00,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440922198] [2021-07-09 17:40:00,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:00,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:00,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:00,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:00,991 INFO L87 Difference]: Start difference. First operand 244 states and 531 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:01,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:01,355 INFO L93 Difference]: Finished difference Result 270 states and 576 transitions. [2021-07-09 17:40:01,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:40:01,355 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:01,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:01,355 INFO L225 Difference]: With dead ends: 270 [2021-07-09 17:40:01,355 INFO L226 Difference]: Without dead ends: 258 [2021-07-09 17:40:01,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 472.1ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:40:01,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-07-09 17:40:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 243. [2021-07-09 17:40:01,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.1859504132231407) internal successors, (529), 242 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:01,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 529 transitions. [2021-07-09 17:40:01,357 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 529 transitions. Word has length 20 [2021-07-09 17:40:01,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:01,358 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 529 transitions. [2021-07-09 17:40:01,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:01,358 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 529 transitions. [2021-07-09 17:40:01,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:01,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:01,358 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:01,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3622,743 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:01,558 INFO L430 AbstractCegarLoop]: === Iteration 749 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:01,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:01,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1655012834, now seen corresponding path program 743 times [2021-07-09 17:40:01,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:01,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482411569] [2021-07-09 17:40:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:01,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:01,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482411569] [2021-07-09 17:40:01,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482411569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:01,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436380220] [2021-07-09 17:40:01,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 744 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 744 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:01,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:40:01,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:01,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:01,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:01,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:01,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:01,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:01,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:01,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:01,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:01,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:02,037 INFO L628 ElimStorePlain]: treesize reduction 95, result has 40.6 percent of original size [2021-07-09 17:40:02,037 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:40:02,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:02,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:02,043 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:02,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:02,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:02,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:02,068 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:02,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:02,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:02,089 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:173, output treesize:36 [2021-07-09 17:40:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:02,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436380220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:02,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:02,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:02,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895944716] [2021-07-09 17:40:02,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:02,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:02,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:02,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:02,168 INFO L87 Difference]: Start difference. First operand 243 states and 529 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:02,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:02,679 INFO L93 Difference]: Finished difference Result 302 states and 636 transitions. [2021-07-09 17:40:02,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:40:02,679 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:02,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:02,679 INFO L225 Difference]: With dead ends: 302 [2021-07-09 17:40:02,679 INFO L226 Difference]: Without dead ends: 283 [2021-07-09 17:40:02,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 672.1ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:40:02,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-07-09 17:40:02,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 242. [2021-07-09 17:40:02,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:02,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-07-09 17:40:02,682 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-07-09 17:40:02,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:02,682 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-07-09 17:40:02,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:02,682 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-07-09 17:40:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:02,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:02,682 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:02,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3625,744 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:02,883 INFO L430 AbstractCegarLoop]: === Iteration 750 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:02,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:02,883 INFO L82 PathProgramCache]: Analyzing trace with hash -451771286, now seen corresponding path program 744 times [2021-07-09 17:40:02,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:02,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017777531] [2021-07-09 17:40:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:03,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:03,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017777531] [2021-07-09 17:40:03,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017777531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:03,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219891794] [2021-07-09 17:40:03,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 745 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 745 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:03,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:40:03,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:03,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:03,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:03,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:03,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:03,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:03,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:03,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:03,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:03,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:03,427 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:40:03,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:03,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:03,431 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:03,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:03,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:03,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:03,457 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:03,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:03,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:03,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:03,483 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:03,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:03,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:03,505 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:40:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:03,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219891794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:03,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:03,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:03,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148866521] [2021-07-09 17:40:03,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:03,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:03,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:03,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:03,593 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:04,221 INFO L93 Difference]: Finished difference Result 302 states and 636 transitions. [2021-07-09 17:40:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:40:04,222 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:04,222 INFO L225 Difference]: With dead ends: 302 [2021-07-09 17:40:04,222 INFO L226 Difference]: Without dead ends: 283 [2021-07-09 17:40:04,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 805.3ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:40:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-07-09 17:40:04,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 242. [2021-07-09 17:40:04,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:04,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-07-09 17:40:04,225 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-07-09 17:40:04,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:04,225 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-07-09 17:40:04,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:04,225 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-07-09 17:40:04,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:04,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:04,225 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:04,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 745 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3630 [2021-07-09 17:40:04,426 INFO L430 AbstractCegarLoop]: === Iteration 751 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:04,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:04,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1337569566, now seen corresponding path program 745 times [2021-07-09 17:40:04,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:04,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404725612] [2021-07-09 17:40:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:04,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:04,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404725612] [2021-07-09 17:40:04,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404725612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:04,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109470621] [2021-07-09 17:40:04,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 746 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 746 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:04,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:04,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:04,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:04,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:04,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:04,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:04,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:04,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:04,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:05,002 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:40:05,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:05,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:05,007 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:05,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:05,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:05,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:05,031 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:05,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:05,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:05,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:05,055 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:05,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:05,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:05,076 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:40:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:05,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109470621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:05,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:05,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:40:05,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661043869] [2021-07-09 17:40:05,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:40:05,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:05,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:40:05,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:05,154 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:05,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:05,732 INFO L93 Difference]: Finished difference Result 306 states and 644 transitions. [2021-07-09 17:40:05,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:40:05,732 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:05,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:05,733 INFO L225 Difference]: With dead ends: 306 [2021-07-09 17:40:05,733 INFO L226 Difference]: Without dead ends: 287 [2021-07-09 17:40:05,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 706.4ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:40:05,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-07-09 17:40:05,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 242. [2021-07-09 17:40:05,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:05,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-07-09 17:40:05,735 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-07-09 17:40:05,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:05,735 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-07-09 17:40:05,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:05,735 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-07-09 17:40:05,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:05,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:05,736 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:05,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3635,746 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:05,936 INFO L430 AbstractCegarLoop]: === Iteration 752 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:05,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:05,936 INFO L82 PathProgramCache]: Analyzing trace with hash 885185066, now seen corresponding path program 746 times [2021-07-09 17:40:05,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:05,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303250845] [2021-07-09 17:40:05,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:06,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:06,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303250845] [2021-07-09 17:40:06,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303250845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:06,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522914265] [2021-07-09 17:40:06,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 747 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 747 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:06,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:06,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:06,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:40:06,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:06,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:06,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:06,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:06,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:06,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:06,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:06,365 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:06,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:06,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:40:06,372 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:40:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:06,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522914265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:06,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:06,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:40:06,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109281776] [2021-07-09 17:40:06,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:40:06,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:06,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:40:06,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:06,416 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:06,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:06,770 INFO L93 Difference]: Finished difference Result 271 states and 578 transitions. [2021-07-09 17:40:06,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:40:06,770 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:06,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:06,771 INFO L225 Difference]: With dead ends: 271 [2021-07-09 17:40:06,771 INFO L226 Difference]: Without dead ends: 264 [2021-07-09 17:40:06,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 451.4ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:40:06,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-07-09 17:40:06,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 247. [2021-07-09 17:40:06,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.186991869918699) internal successors, (538), 246 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:06,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 538 transitions. [2021-07-09 17:40:06,773 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 538 transitions. Word has length 20 [2021-07-09 17:40:06,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:06,773 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 538 transitions. [2021-07-09 17:40:06,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:06,773 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 538 transitions. [2021-07-09 17:40:06,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:06,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:06,774 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:06,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3640,747 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:06,974 INFO L430 AbstractCegarLoop]: === Iteration 753 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:06,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:06,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1837538274, now seen corresponding path program 747 times [2021-07-09 17:40:06,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:06,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896789473] [2021-07-09 17:40:06,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:07,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:07,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896789473] [2021-07-09 17:40:07,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896789473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:07,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212551752] [2021-07-09 17:40:07,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 748 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 748 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:07,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:40:07,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:07,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:40:07,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:07,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:07,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:07,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:07,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:07,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:07,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:07,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:07,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:07,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:07,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:07,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:07,413 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:07,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:07,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:07,417 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:07,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:07,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:07,434 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-07-09 17:40:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:07,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212551752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:07,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:07,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:07,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591488682] [2021-07-09 17:40:07,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:07,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:07,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:07,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:07,495 INFO L87 Difference]: Start difference. First operand 247 states and 538 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:08,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:08,114 INFO L93 Difference]: Finished difference Result 291 states and 617 transitions. [2021-07-09 17:40:08,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:40:08,114 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:08,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:08,115 INFO L225 Difference]: With dead ends: 291 [2021-07-09 17:40:08,115 INFO L226 Difference]: Without dead ends: 275 [2021-07-09 17:40:08,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 660.6ms TimeCoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:40:08,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-07-09 17:40:08,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 248. [2021-07-09 17:40:08,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.1862348178137654) internal successors, (540), 247 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:08,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 540 transitions. [2021-07-09 17:40:08,117 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 540 transitions. Word has length 20 [2021-07-09 17:40:08,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:08,117 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 540 transitions. [2021-07-09 17:40:08,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:08,117 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 540 transitions. [2021-07-09 17:40:08,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:08,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:08,117 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:08,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3641,748 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:08,318 INFO L430 AbstractCegarLoop]: === Iteration 754 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:08,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:08,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1595423958, now seen corresponding path program 748 times [2021-07-09 17:40:08,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:08,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203565014] [2021-07-09 17:40:08,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:08,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:08,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203565014] [2021-07-09 17:40:08,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203565014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:08,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678027323] [2021-07-09 17:40:08,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 749 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 749 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:08,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:08,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:08,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:08,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:08,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:08,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:08,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:08,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:08,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:08,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:08,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:08,741 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:40:08,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:08,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:08,744 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:08,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:08,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:40:08,751 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:40:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:08,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678027323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:08,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:08,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:40:08,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803880842] [2021-07-09 17:40:08,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:40:08,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:08,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:40:08,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:08,796 INFO L87 Difference]: Start difference. First operand 248 states and 540 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:09,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:09,281 INFO L93 Difference]: Finished difference Result 290 states and 615 transitions. [2021-07-09 17:40:09,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:40:09,282 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:09,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:09,282 INFO L225 Difference]: With dead ends: 290 [2021-07-09 17:40:09,282 INFO L226 Difference]: Without dead ends: 277 [2021-07-09 17:40:09,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 574.6ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:40:09,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-07-09 17:40:09,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 249. [2021-07-09 17:40:09,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.185483870967742) internal successors, (542), 248 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:09,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 542 transitions. [2021-07-09 17:40:09,284 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 542 transitions. Word has length 20 [2021-07-09 17:40:09,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:09,284 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 542 transitions. [2021-07-09 17:40:09,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:09,285 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 542 transitions. [2021-07-09 17:40:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:09,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:09,285 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:09,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3644,749 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:09,485 INFO L430 AbstractCegarLoop]: === Iteration 755 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:09,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:09,486 INFO L82 PathProgramCache]: Analyzing trace with hash -459238686, now seen corresponding path program 749 times [2021-07-09 17:40:09,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:09,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905335276] [2021-07-09 17:40:09,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:09,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:09,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905335276] [2021-07-09 17:40:09,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905335276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:09,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860489654] [2021-07-09 17:40:09,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 750 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 750 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:09,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:40:09,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:09,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:09,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:09,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:09,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:09,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:09,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:09,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:09,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:09,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:09,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:09,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:09,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:09,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:09,864 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:09,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:09,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:09,867 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:09,926 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-07-09 17:40:09,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:09,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:09,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:09,930 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:09,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:09,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:09,933 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:09,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:09,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:09,955 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:40:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:10,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860489654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:10,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:10,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:40:10,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449995115] [2021-07-09 17:40:10,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:40:10,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:10,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:40:10,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:10,030 INFO L87 Difference]: Start difference. First operand 249 states and 542 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:10,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:10,583 INFO L93 Difference]: Finished difference Result 317 states and 659 transitions. [2021-07-09 17:40:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:40:10,583 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:10,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:10,584 INFO L225 Difference]: With dead ends: 317 [2021-07-09 17:40:10,584 INFO L226 Difference]: Without dead ends: 298 [2021-07-09 17:40:10,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 567.2ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:40:10,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-07-09 17:40:10,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 245. [2021-07-09 17:40:10,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:10,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-07-09 17:40:10,586 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-07-09 17:40:10,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:10,586 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-07-09 17:40:10,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:10,586 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-07-09 17:40:10,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:10,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:10,587 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:10,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 750 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3645 [2021-07-09 17:40:10,787 INFO L430 AbstractCegarLoop]: === Iteration 756 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:10,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:10,787 INFO L82 PathProgramCache]: Analyzing trace with hash 951739994, now seen corresponding path program 750 times [2021-07-09 17:40:10,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:10,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460228276] [2021-07-09 17:40:10,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:10,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:10,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460228276] [2021-07-09 17:40:10,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460228276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:10,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253137612] [2021-07-09 17:40:10,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 751 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 751 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:10,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:40:10,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:10,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:10,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:11,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:11,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:11,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:11,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:11,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:11,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:11,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:11,185 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:40:11,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:11,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:11,188 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:11,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:11,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:40:11,195 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:40:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:11,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253137612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:11,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:11,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:11,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921474497] [2021-07-09 17:40:11,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:11,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:11,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:11,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:11,236 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:11,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:11,558 INFO L93 Difference]: Finished difference Result 270 states and 574 transitions. [2021-07-09 17:40:11,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:40:11,558 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:11,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:11,559 INFO L225 Difference]: With dead ends: 270 [2021-07-09 17:40:11,559 INFO L226 Difference]: Without dead ends: 254 [2021-07-09 17:40:11,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 452.7ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:40:11,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-09 17:40:11,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 247. [2021-07-09 17:40:11,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.182926829268293) internal successors, (537), 246 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:11,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 537 transitions. [2021-07-09 17:40:11,561 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 537 transitions. Word has length 20 [2021-07-09 17:40:11,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:11,561 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 537 transitions. [2021-07-09 17:40:11,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:11,561 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 537 transitions. [2021-07-09 17:40:11,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:11,561 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:11,561 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:11,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3648,751 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:11,762 INFO L430 AbstractCegarLoop]: === Iteration 757 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:11,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:11,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1813745058, now seen corresponding path program 751 times [2021-07-09 17:40:11,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:11,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918630031] [2021-07-09 17:40:11,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:11,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:11,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918630031] [2021-07-09 17:40:11,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918630031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:11,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397523788] [2021-07-09 17:40:11,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 752 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 752 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:12,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:12,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:12,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:12,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:12,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:12,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:12,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:12,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:12,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:12,219 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:40:12,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:12,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:12,222 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:12,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:12,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:40:12,229 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:40:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:12,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397523788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:12,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:12,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:40:12,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600161240] [2021-07-09 17:40:12,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:40:12,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:12,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:40:12,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:12,275 INFO L87 Difference]: Start difference. First operand 247 states and 537 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:12,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:12,692 INFO L93 Difference]: Finished difference Result 280 states and 594 transitions. [2021-07-09 17:40:12,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:40:12,692 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:12,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:12,693 INFO L225 Difference]: With dead ends: 280 [2021-07-09 17:40:12,693 INFO L226 Difference]: Without dead ends: 261 [2021-07-09 17:40:12,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 585.3ms TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:40:12,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-09 17:40:12,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 248. [2021-07-09 17:40:12,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.182186234817814) internal successors, (539), 247 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:12,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 539 transitions. [2021-07-09 17:40:12,695 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 539 transitions. Word has length 20 [2021-07-09 17:40:12,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:12,695 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 539 transitions. [2021-07-09 17:40:12,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:12,695 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 539 transitions. [2021-07-09 17:40:12,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:12,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:12,695 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:12,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 752 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3649 [2021-07-09 17:40:12,896 INFO L430 AbstractCegarLoop]: === Iteration 758 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:12,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:12,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1345036966, now seen corresponding path program 752 times [2021-07-09 17:40:12,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:12,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101057080] [2021-07-09 17:40:12,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:13,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:13,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101057080] [2021-07-09 17:40:13,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101057080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:13,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257806767] [2021-07-09 17:40:13,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 753 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 753 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:13,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:13,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:13,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:40:13,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:13,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:13,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:13,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:13,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:13,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:13,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:13,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:13,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:13,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:13,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:13,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:13,295 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:13,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:13,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:13,299 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:13,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:13,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:13,318 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:40:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:13,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257806767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:13,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:13,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:13,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657435083] [2021-07-09 17:40:13,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:13,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:13,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:13,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:13,395 INFO L87 Difference]: Start difference. First operand 248 states and 539 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:14,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:14,049 INFO L93 Difference]: Finished difference Result 299 states and 629 transitions. [2021-07-09 17:40:14,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:40:14,049 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:14,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:14,050 INFO L225 Difference]: With dead ends: 299 [2021-07-09 17:40:14,050 INFO L226 Difference]: Without dead ends: 283 [2021-07-09 17:40:14,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 762.0ms TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:40:14,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-07-09 17:40:14,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 246. [2021-07-09 17:40:14,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.183673469387755) internal successors, (535), 245 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 535 transitions. [2021-07-09 17:40:14,052 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 535 transitions. Word has length 20 [2021-07-09 17:40:14,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:14,052 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 535 transitions. [2021-07-09 17:40:14,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:14,052 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 535 transitions. [2021-07-09 17:40:14,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:14,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:14,053 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:14,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 753 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3650 [2021-07-09 17:40:14,253 INFO L430 AbstractCegarLoop]: === Iteration 759 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:14,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:14,253 INFO L82 PathProgramCache]: Analyzing trace with hash -293039062, now seen corresponding path program 753 times [2021-07-09 17:40:14,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:14,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715937862] [2021-07-09 17:40:14,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:14,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:14,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715937862] [2021-07-09 17:40:14,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715937862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:14,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048378648] [2021-07-09 17:40:14,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 754 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 754 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:14,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:40:14,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:14,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:14,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:14,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:14,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:14,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:14,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:14,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:14,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:14,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:14,699 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:40:14,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:14,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:14,707 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:14,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:14,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:40:14,715 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:40:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:14,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048378648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:14,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:14,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:40:14,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885414834] [2021-07-09 17:40:14,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:40:14,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:14,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:40:14,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:14,759 INFO L87 Difference]: Start difference. First operand 246 states and 535 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:15,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:15,187 INFO L93 Difference]: Finished difference Result 277 states and 592 transitions. [2021-07-09 17:40:15,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:40:15,188 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:15,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:15,188 INFO L225 Difference]: With dead ends: 277 [2021-07-09 17:40:15,188 INFO L226 Difference]: Without dead ends: 264 [2021-07-09 17:40:15,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 495.9ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:40:15,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-07-09 17:40:15,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 248. [2021-07-09 17:40:15,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.182186234817814) internal successors, (539), 247 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:15,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 539 transitions. [2021-07-09 17:40:15,191 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 539 transitions. Word has length 20 [2021-07-09 17:40:15,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:15,191 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 539 transitions. [2021-07-09 17:40:15,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:15,191 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 539 transitions. [2021-07-09 17:40:15,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:15,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:15,191 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:15,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3653,754 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:15,392 INFO L430 AbstractCegarLoop]: === Iteration 760 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:15,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:15,392 INFO L82 PathProgramCache]: Analyzing trace with hash 843146210, now seen corresponding path program 754 times [2021-07-09 17:40:15,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:15,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682825558] [2021-07-09 17:40:15,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:15,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:15,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682825558] [2021-07-09 17:40:15,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682825558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:15,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306548760] [2021-07-09 17:40:15,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 755 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 755 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:15,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:15,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:15,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:15,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:15,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:15,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:15,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:15,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:15,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:15,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:15,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:15,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:15,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:15,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:15,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:15,758 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:15,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:15,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:15,761 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:15,813 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-07-09 17:40:15,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:15,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:15,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:15,817 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:15,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:15,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:15,820 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:15,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:15,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:15,853 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:40:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:15,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306548760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:15,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:15,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:40:15,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884664248] [2021-07-09 17:40:15,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:40:15,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:15,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:40:15,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:15,929 INFO L87 Difference]: Start difference. First operand 248 states and 539 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:16,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:16,426 INFO L93 Difference]: Finished difference Result 301 states and 630 transitions. [2021-07-09 17:40:16,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:40:16,426 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:16,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:16,427 INFO L225 Difference]: With dead ends: 301 [2021-07-09 17:40:16,427 INFO L226 Difference]: Without dead ends: 282 [2021-07-09 17:40:16,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 585.4ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:40:16,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-07-09 17:40:16,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 245. [2021-07-09 17:40:16,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-07-09 17:40:16,429 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-07-09 17:40:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:16,429 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-07-09 17:40:16,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-07-09 17:40:16,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:16,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:16,430 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:16,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3654,755 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:16,630 INFO L430 AbstractCegarLoop]: === Iteration 761 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:16,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:16,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1303024550, now seen corresponding path program 755 times [2021-07-09 17:40:16,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:16,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5833131] [2021-07-09 17:40:16,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:16,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:16,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5833131] [2021-07-09 17:40:16,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5833131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:16,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997960267] [2021-07-09 17:40:16,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 756 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 756 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:16,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:40:16,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:16,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:16,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:17,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:17,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:17,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:17,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:17,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:17,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:17,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:17,103 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:40:17,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:17,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:17,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:17,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:17,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:17,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:17,134 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:17,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:17,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:17,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:17,173 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:17,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:17,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:17,205 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:40:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:17,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997960267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:17,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:17,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:17,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937431868] [2021-07-09 17:40:17,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:17,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:17,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:17,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:17,286 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:17,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:17,820 INFO L93 Difference]: Finished difference Result 313 states and 658 transitions. [2021-07-09 17:40:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:40:17,821 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:17,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:17,821 INFO L225 Difference]: With dead ends: 313 [2021-07-09 17:40:17,821 INFO L226 Difference]: Without dead ends: 294 [2021-07-09 17:40:17,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 662.0ms TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:40:17,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-07-09 17:40:17,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 242. [2021-07-09 17:40:17,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:17,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-07-09 17:40:17,824 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-07-09 17:40:17,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:17,824 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-07-09 17:40:17,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:17,824 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-07-09 17:40:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:17,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:17,824 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:18,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3657,756 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:18,025 INFO L430 AbstractCegarLoop]: === Iteration 762 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:18,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:18,025 INFO L82 PathProgramCache]: Analyzing trace with hash -738202910, now seen corresponding path program 756 times [2021-07-09 17:40:18,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:18,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195760907] [2021-07-09 17:40:18,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:18,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:18,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195760907] [2021-07-09 17:40:18,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195760907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:18,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253545663] [2021-07-09 17:40:18,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 757 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 757 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:18,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:40:18,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:18,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:40:18,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:18,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:18,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:18,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:18,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:18,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:18,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:18,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:18,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:18,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:18,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:18,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:18,407 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:18,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:18,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:18,410 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:18,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:18,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:18,427 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-07-09 17:40:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:18,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253545663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:18,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:18,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:18,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044723785] [2021-07-09 17:40:18,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:18,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:18,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:18,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:18,480 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:18,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:18,893 INFO L93 Difference]: Finished difference Result 277 states and 596 transitions. [2021-07-09 17:40:18,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:40:18,893 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:18,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:18,894 INFO L225 Difference]: With dead ends: 277 [2021-07-09 17:40:18,894 INFO L226 Difference]: Without dead ends: 270 [2021-07-09 17:40:18,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 472.4ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:40:18,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-07-09 17:40:18,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 245. [2021-07-09 17:40:18,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1885245901639343) internal successors, (534), 244 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:18,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 534 transitions. [2021-07-09 17:40:18,896 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 534 transitions. Word has length 20 [2021-07-09 17:40:18,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:18,896 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 534 transitions. [2021-07-09 17:40:18,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:18,896 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 534 transitions. [2021-07-09 17:40:18,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:18,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:18,897 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:19,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3662,757 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:19,097 INFO L430 AbstractCegarLoop]: === Iteration 763 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:19,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:19,097 INFO L82 PathProgramCache]: Analyzing trace with hash 123802154, now seen corresponding path program 757 times [2021-07-09 17:40:19,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:19,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736396833] [2021-07-09 17:40:19,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:19,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:19,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736396833] [2021-07-09 17:40:19,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736396833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:19,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816832231] [2021-07-09 17:40:19,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 758 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 758 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:19,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:19,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:19,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:19,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:19,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:19,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:19,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:19,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:19,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:19,501 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-07-09 17:40:19,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:19,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:40:19,503 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:19,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:19,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:40:19,511 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:40:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:19,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816832231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:19,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:19,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:19,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756784425] [2021-07-09 17:40:19,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:19,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:19,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:19,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:19,554 INFO L87 Difference]: Start difference. First operand 245 states and 534 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:20,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:20,019 INFO L93 Difference]: Finished difference Result 287 states and 606 transitions. [2021-07-09 17:40:20,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:40:20,019 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:20,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:20,020 INFO L225 Difference]: With dead ends: 287 [2021-07-09 17:40:20,020 INFO L226 Difference]: Without dead ends: 268 [2021-07-09 17:40:20,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 522.3ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:40:20,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-07-09 17:40:20,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 246. [2021-07-09 17:40:20,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.1877551020408164) internal successors, (536), 245 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:20,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 536 transitions. [2021-07-09 17:40:20,022 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 536 transitions. Word has length 20 [2021-07-09 17:40:20,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:20,022 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 536 transitions. [2021-07-09 17:40:20,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:20,022 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 536 transitions. [2021-07-09 17:40:20,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:20,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:20,023 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:20,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3665,758 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:20,223 INFO L430 AbstractCegarLoop]: === Iteration 764 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:20,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:20,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1259987426, now seen corresponding path program 758 times [2021-07-09 17:40:20,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:20,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617053569] [2021-07-09 17:40:20,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:20,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:20,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617053569] [2021-07-09 17:40:20,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617053569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:20,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186165972] [2021-07-09 17:40:20,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 759 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 759 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:20,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:20,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:20,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:40:20,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:20,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:20,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:20,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:20,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:20,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:20,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:20,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:20,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:20,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:20,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:20,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:20,623 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:20,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:20,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:20,627 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:20,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:20,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:20,648 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:40:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:20,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186165972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:20,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:20,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:20,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095991308] [2021-07-09 17:40:20,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:20,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:20,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:20,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:20,723 INFO L87 Difference]: Start difference. First operand 246 states and 536 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:21,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:21,264 INFO L93 Difference]: Finished difference Result 306 states and 641 transitions. [2021-07-09 17:40:21,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:40:21,264 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:21,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:21,265 INFO L225 Difference]: With dead ends: 306 [2021-07-09 17:40:21,265 INFO L226 Difference]: Without dead ends: 290 [2021-07-09 17:40:21,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 626.4ms TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:40:21,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-07-09 17:40:21,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 244. [2021-07-09 17:40:21,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.185185185185185) internal successors, (531), 243 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 531 transitions. [2021-07-09 17:40:21,267 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 531 transitions. Word has length 20 [2021-07-09 17:40:21,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:21,267 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 531 transitions. [2021-07-09 17:40:21,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:21,267 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 531 transitions. [2021-07-09 17:40:21,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:21,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:21,268 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:21,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 759 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3666 [2021-07-09 17:40:21,468 INFO L430 AbstractCegarLoop]: === Iteration 765 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:21,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:21,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1982981966, now seen corresponding path program 759 times [2021-07-09 17:40:21,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:21,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328670591] [2021-07-09 17:40:21,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:21,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:21,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:21,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328670591] [2021-07-09 17:40:21,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328670591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:21,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134735335] [2021-07-09 17:40:21,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 760 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 760 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:21,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:40:21,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:21,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:21,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:21,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:21,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:21,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:21,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:21,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:21,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:21,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:21,904 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:40:21,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:21,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:21,907 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:21,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:21,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:40:21,914 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:40:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:21,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134735335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:21,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:21,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:21,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401737522] [2021-07-09 17:40:21,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:21,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:21,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:21,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:21,953 INFO L87 Difference]: Start difference. First operand 244 states and 531 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:22,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:22,297 INFO L93 Difference]: Finished difference Result 267 states and 572 transitions. [2021-07-09 17:40:22,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:40:22,297 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:22,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:22,298 INFO L225 Difference]: With dead ends: 267 [2021-07-09 17:40:22,298 INFO L226 Difference]: Without dead ends: 254 [2021-07-09 17:40:22,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 523.3ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:40:22,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-09 17:40:22,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 246. [2021-07-09 17:40:22,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.183673469387755) internal successors, (535), 245 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:22,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 535 transitions. [2021-07-09 17:40:22,300 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 535 transitions. Word has length 20 [2021-07-09 17:40:22,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:22,300 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 535 transitions. [2021-07-09 17:40:22,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:22,300 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 535 transitions. [2021-07-09 17:40:22,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:22,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:22,301 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:22,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3669,760 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:22,501 INFO L430 AbstractCegarLoop]: === Iteration 766 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:22,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:22,501 INFO L82 PathProgramCache]: Analyzing trace with hash -846796694, now seen corresponding path program 760 times [2021-07-09 17:40:22,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:22,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585730161] [2021-07-09 17:40:22,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:22,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:22,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585730161] [2021-07-09 17:40:22,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585730161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:22,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242122191] [2021-07-09 17:40:22,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 761 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 761 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:22,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:22,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:22,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:22,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:22,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:22,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:22,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:22,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:22,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:22,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:22,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:22,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:22,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:22,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:22,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:22,812 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:22,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:22,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:22,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:22,866 INFO L628 ElimStorePlain]: treesize reduction 83, result has 44.7 percent of original size [2021-07-09 17:40:22,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:22,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:22,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:22,870 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:22,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:22,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:22,874 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:22,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:22,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:22,896 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:40:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:22,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242122191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:22,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:22,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:40:22,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403158775] [2021-07-09 17:40:22,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:40:22,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:22,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:40:22,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:22,967 INFO L87 Difference]: Start difference. First operand 246 states and 535 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:23,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:23,369 INFO L93 Difference]: Finished difference Result 286 states and 599 transitions. [2021-07-09 17:40:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:40:23,369 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:23,370 INFO L225 Difference]: With dead ends: 286 [2021-07-09 17:40:23,370 INFO L226 Difference]: Without dead ends: 267 [2021-07-09 17:40:23,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 494.2ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:40:23,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-07-09 17:40:23,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 245. [2021-07-09 17:40:23,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:23,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-07-09 17:40:23,372 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-07-09 17:40:23,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:23,372 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-07-09 17:40:23,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:23,372 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-07-09 17:40:23,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:23,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:23,372 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:23,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 761 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-07-09 17:40:23,573 INFO L430 AbstractCegarLoop]: === Iteration 767 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:23,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:23,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1301999842, now seen corresponding path program 761 times [2021-07-09 17:40:23,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:23,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817104185] [2021-07-09 17:40:23,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:23,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:23,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817104185] [2021-07-09 17:40:23,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817104185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:23,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567726221] [2021-07-09 17:40:23,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 762 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 762 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:23,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:40:23,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:23,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:23,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:23,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:23,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:23,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:23,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:23,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:23,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:23,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:24,027 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:40:24,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:24,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:24,035 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:24,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:24,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:24,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:24,061 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:24,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:24,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:24,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:24,085 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:24,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:24,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:24,105 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:40:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:24,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567726221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:24,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:24,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:24,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117666957] [2021-07-09 17:40:24,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:24,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:24,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:24,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:24,187 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:24,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:24,695 INFO L93 Difference]: Finished difference Result 306 states and 640 transitions. [2021-07-09 17:40:24,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:40:24,695 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:24,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:24,696 INFO L225 Difference]: With dead ends: 306 [2021-07-09 17:40:24,696 INFO L226 Difference]: Without dead ends: 284 [2021-07-09 17:40:24,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 654.9ms TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:40:24,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-07-09 17:40:24,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 242. [2021-07-09 17:40:24,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:24,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-07-09 17:40:24,698 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-07-09 17:40:24,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:24,698 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-07-09 17:40:24,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:24,698 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-07-09 17:40:24,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:24,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:24,698 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:24,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3673,762 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:24,899 INFO L430 AbstractCegarLoop]: === Iteration 768 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:24,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:24,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1426187050, now seen corresponding path program 762 times [2021-07-09 17:40:24,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:24,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007626357] [2021-07-09 17:40:24,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:25,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:25,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007626357] [2021-07-09 17:40:25,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007626357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:25,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508000060] [2021-07-09 17:40:25,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 763 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 763 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:25,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:40:25,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:25,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:25,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:25,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:25,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:25,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:25,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:25,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:25,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:25,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:25,300 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:40:25,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:25,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:25,303 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:25,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:25,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:40:25,310 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:40:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:25,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508000060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:25,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:25,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:25,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418239717] [2021-07-09 17:40:25,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:25,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:25,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:25,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:25,348 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:25,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:25,579 INFO L93 Difference]: Finished difference Result 266 states and 567 transitions. [2021-07-09 17:40:25,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:40:25,580 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:25,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:25,580 INFO L225 Difference]: With dead ends: 266 [2021-07-09 17:40:25,580 INFO L226 Difference]: Without dead ends: 253 [2021-07-09 17:40:25,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 425.0ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:40:25,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-07-09 17:40:25,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 245. [2021-07-09 17:40:25,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:25,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-07-09 17:40:25,582 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-07-09 17:40:25,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:25,582 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-07-09 17:40:25,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:25,582 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-07-09 17:40:25,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:25,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:25,583 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:25,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3678,763 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:25,783 INFO L430 AbstractCegarLoop]: === Iteration 769 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:25,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:25,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1732594974, now seen corresponding path program 763 times [2021-07-09 17:40:25,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:25,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230822728] [2021-07-09 17:40:25,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:25,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:25,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230822728] [2021-07-09 17:40:25,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230822728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:25,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609298422] [2021-07-09 17:40:25,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 764 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 764 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:26,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:26,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:26,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:26,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:26,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:26,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:26,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:26,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:26,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:26,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:26,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:26,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:26,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:26,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:26,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:26,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:26,172 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:26,225 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-07-09 17:40:26,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:26,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:26,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:26,230 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:26,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:26,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:26,233 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:26,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:26,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:26,256 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:40:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:26,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609298422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:26,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:26,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:40:26,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349091938] [2021-07-09 17:40:26,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:40:26,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:26,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:40:26,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:26,331 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:26,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:26,771 INFO L93 Difference]: Finished difference Result 299 states and 623 transitions. [2021-07-09 17:40:26,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:40:26,772 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:26,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:26,772 INFO L225 Difference]: With dead ends: 299 [2021-07-09 17:40:26,772 INFO L226 Difference]: Without dead ends: 277 [2021-07-09 17:40:26,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 591.2ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:40:26,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-07-09 17:40:26,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 242. [2021-07-09 17:40:26,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:26,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-07-09 17:40:26,775 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-07-09 17:40:26,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:26,775 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-07-09 17:40:26,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:26,775 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-07-09 17:40:26,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:26,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:26,775 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:26,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 764 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3679 [2021-07-09 17:40:26,976 INFO L430 AbstractCegarLoop]: === Iteration 770 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:26,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:26,976 INFO L82 PathProgramCache]: Analyzing trace with hash 416201562, now seen corresponding path program 764 times [2021-07-09 17:40:26,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:26,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791861728] [2021-07-09 17:40:26,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:27,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:27,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791861728] [2021-07-09 17:40:27,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791861728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:27,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111684080] [2021-07-09 17:40:27,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 765 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 765 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:27,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:27,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:27,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:40:27,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:27,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:27,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:27,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:27,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:27,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:27,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:27,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:27,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:27,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:27,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:27,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:27,365 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:27,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:27,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:27,368 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:27,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:27,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:27,391 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:40:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:27,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111684080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:27,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:27,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:27,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902627145] [2021-07-09 17:40:27,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:27,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:27,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:27,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:27,474 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:28,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:28,127 INFO L93 Difference]: Finished difference Result 283 states and 611 transitions. [2021-07-09 17:40:28,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:40:28,127 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:28,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:28,128 INFO L225 Difference]: With dead ends: 283 [2021-07-09 17:40:28,128 INFO L226 Difference]: Without dead ends: 274 [2021-07-09 17:40:28,128 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 778.4ms TimeCoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:40:28,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-07-09 17:40:28,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 242. [2021-07-09 17:40:28,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-07-09 17:40:28,130 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-07-09 17:40:28,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:28,130 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-07-09 17:40:28,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:28,130 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-07-09 17:40:28,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:28,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:28,130 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:28,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 765 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3682 [2021-07-09 17:40:28,331 INFO L430 AbstractCegarLoop]: === Iteration 771 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:28,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1690582558, now seen corresponding path program 765 times [2021-07-09 17:40:28,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:28,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055985434] [2021-07-09 17:40:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:28,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:28,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055985434] [2021-07-09 17:40:28,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055985434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:28,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048086128] [2021-07-09 17:40:28,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 766 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 766 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:28,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:40:28,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:28,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:28,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:28,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:28,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:28,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:28,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:28,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:28,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:28,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:28,861 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:40:28,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:28,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:28,864 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:28,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:28,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:28,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:28,889 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:28,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:28,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:28,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:28,913 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:28,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:28,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:28,934 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:40:29,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:29,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048086128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:29,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:29,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:29,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327416805] [2021-07-09 17:40:29,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:29,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:29,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:29,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:29,016 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:29,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:29,631 INFO L93 Difference]: Finished difference Result 315 states and 662 transitions. [2021-07-09 17:40:29,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:40:29,631 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:29,631 INFO L225 Difference]: With dead ends: 315 [2021-07-09 17:40:29,631 INFO L226 Difference]: Without dead ends: 296 [2021-07-09 17:40:29,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 756.9ms TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:40:29,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-07-09 17:40:29,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 242. [2021-07-09 17:40:29,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:29,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-07-09 17:40:29,634 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-07-09 17:40:29,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:29,634 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-07-09 17:40:29,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:29,634 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-07-09 17:40:29,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:29,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:29,634 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:29,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3685,766 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:29,835 INFO L430 AbstractCegarLoop]: === Iteration 772 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:29,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:29,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1586825382, now seen corresponding path program 766 times [2021-07-09 17:40:29,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:29,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804193856] [2021-07-09 17:40:29,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:29,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:29,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804193856] [2021-07-09 17:40:29,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804193856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:29,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902621449] [2021-07-09 17:40:29,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 767 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 767 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:30,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:30,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:30,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:30,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:30,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:30,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:30,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:30,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:30,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:30,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:30,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:30,207 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:40:30,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:30,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:30,210 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:30,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:30,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:40:30,217 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:40:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:30,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902621449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:30,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:30,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:30,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560055721] [2021-07-09 17:40:30,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:30,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:30,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:30,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:30,257 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:30,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:30,535 INFO L93 Difference]: Finished difference Result 268 states and 570 transitions. [2021-07-09 17:40:30,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:40:30,536 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:30,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:30,536 INFO L225 Difference]: With dead ends: 268 [2021-07-09 17:40:30,536 INFO L226 Difference]: Without dead ends: 252 [2021-07-09 17:40:30,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 383.5ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:40:30,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-09 17:40:30,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 246. [2021-07-09 17:40:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.183673469387755) internal successors, (535), 245 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 535 transitions. [2021-07-09 17:40:30,538 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 535 transitions. Word has length 20 [2021-07-09 17:40:30,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:30,538 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 535 transitions. [2021-07-09 17:40:30,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:30,539 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 535 transitions. [2021-07-09 17:40:30,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:30,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:30,539 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:30,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 767 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3690 [2021-07-09 17:40:30,739 INFO L430 AbstractCegarLoop]: === Iteration 773 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:30,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:30,740 INFO L82 PathProgramCache]: Analyzing trace with hash -724820318, now seen corresponding path program 767 times [2021-07-09 17:40:30,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:30,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942676681] [2021-07-09 17:40:30,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:30,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:30,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942676681] [2021-07-09 17:40:30,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942676681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:30,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040401040] [2021-07-09 17:40:30,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 768 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 768 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:30,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:40:30,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:30,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:30,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:31,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:31,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:31,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:31,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:31,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:31,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:31,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:31,157 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-07-09 17:40:31,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:31,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:31,160 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:31,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:31,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:40:31,167 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:40:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:31,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040401040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:31,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:31,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:31,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118430335] [2021-07-09 17:40:31,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:31,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:31,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:31,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:31,208 INFO L87 Difference]: Start difference. First operand 246 states and 535 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:31,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:31,686 INFO L93 Difference]: Finished difference Result 273 states and 584 transitions. [2021-07-09 17:40:31,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:40:31,687 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:31,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:31,687 INFO L225 Difference]: With dead ends: 273 [2021-07-09 17:40:31,687 INFO L226 Difference]: Without dead ends: 260 [2021-07-09 17:40:31,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 574.8ms TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:40:31,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-07-09 17:40:31,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 247. [2021-07-09 17:40:31,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.182926829268293) internal successors, (537), 246 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:31,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 537 transitions. [2021-07-09 17:40:31,689 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 537 transitions. Word has length 20 [2021-07-09 17:40:31,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:31,689 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 537 transitions. [2021-07-09 17:40:31,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:31,689 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 537 transitions. [2021-07-09 17:40:31,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:31,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:31,690 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:31,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3691,768 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:31,890 INFO L430 AbstractCegarLoop]: === Iteration 774 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:31,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:31,890 INFO L82 PathProgramCache]: Analyzing trace with hash 411364954, now seen corresponding path program 768 times [2021-07-09 17:40:31,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:31,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463491855] [2021-07-09 17:40:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:32,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:32,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463491855] [2021-07-09 17:40:32,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463491855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:32,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910825245] [2021-07-09 17:40:32,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 769 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 769 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:32,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:40:32,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:32,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:40:32,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:32,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:32,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:32,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:32,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:32,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:32,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:32,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:32,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:32,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:32,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:32,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:32,327 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:32,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:32,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:32,330 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:32,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:32,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:32,350 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:40:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:32,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910825245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:32,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:32,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:32,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804859728] [2021-07-09 17:40:32,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:32,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:32,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:32,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:32,428 INFO L87 Difference]: Start difference. First operand 247 states and 537 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:32,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:32,817 INFO L93 Difference]: Finished difference Result 273 states and 587 transitions. [2021-07-09 17:40:32,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:40:32,818 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:32,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:32,818 INFO L225 Difference]: With dead ends: 273 [2021-07-09 17:40:32,818 INFO L226 Difference]: Without dead ends: 266 [2021-07-09 17:40:32,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 602.5ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:40:32,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-07-09 17:40:32,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 245. [2021-07-09 17:40:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-07-09 17:40:32,820 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-07-09 17:40:32,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:32,821 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-07-09 17:40:32,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-07-09 17:40:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:32,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:32,821 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:33,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 769 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3692 [2021-07-09 17:40:33,022 INFO L430 AbstractCegarLoop]: === Iteration 775 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:33,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1463362858, now seen corresponding path program 769 times [2021-07-09 17:40:33,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:33,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497995799] [2021-07-09 17:40:33,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:33,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:33,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:33,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497995799] [2021-07-09 17:40:33,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497995799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:33,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270748637] [2021-07-09 17:40:33,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 770 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 770 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:33,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:33,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:33,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:33,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:33,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:33,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:33,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:33,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:33,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:33,397 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-07-09 17:40:33,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:33,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:33,400 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:33,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:33,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:40:33,411 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:40:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:33,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270748637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:33,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:33,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:40:33,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668456585] [2021-07-09 17:40:33,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:40:33,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:33,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:40:33,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:33,445 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:33,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:33,724 INFO L93 Difference]: Finished difference Result 272 states and 575 transitions. [2021-07-09 17:40:33,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:40:33,724 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:33,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:33,725 INFO L225 Difference]: With dead ends: 272 [2021-07-09 17:40:33,725 INFO L226 Difference]: Without dead ends: 253 [2021-07-09 17:40:33,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 417.4ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:40:33,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-07-09 17:40:33,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 246. [2021-07-09 17:40:33,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.183673469387755) internal successors, (535), 245 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:33,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 535 transitions. [2021-07-09 17:40:33,727 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 535 transitions. Word has length 20 [2021-07-09 17:40:33,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:33,727 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 535 transitions. [2021-07-09 17:40:33,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:33,727 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 535 transitions. [2021-07-09 17:40:33,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:33,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:33,727 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:33,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3695,770 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:33,928 INFO L430 AbstractCegarLoop]: === Iteration 776 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:33,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:33,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1695419166, now seen corresponding path program 770 times [2021-07-09 17:40:33,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:33,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471828773] [2021-07-09 17:40:33,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:34,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:34,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471828773] [2021-07-09 17:40:34,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471828773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:34,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899482386] [2021-07-09 17:40:34,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 771 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 771 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:34,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:34,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:34,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:40:34,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:34,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:34,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:34,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:34,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:34,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:34,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:34,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:34,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:34,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:34,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:34,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:34,327 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:34,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:34,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:34,331 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:34,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:34,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:34,352 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:40:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:34,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899482386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:34,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:34,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:34,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468545594] [2021-07-09 17:40:34,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:34,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:34,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:34,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:34,431 INFO L87 Difference]: Start difference. First operand 246 states and 535 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:35,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:35,070 INFO L93 Difference]: Finished difference Result 294 states and 619 transitions. [2021-07-09 17:40:35,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:40:35,070 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:35,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:35,071 INFO L225 Difference]: With dead ends: 294 [2021-07-09 17:40:35,071 INFO L226 Difference]: Without dead ends: 278 [2021-07-09 17:40:35,071 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 791.2ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:40:35,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-07-09 17:40:35,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 245. [2021-07-09 17:40:35,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:35,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-07-09 17:40:35,073 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-07-09 17:40:35,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:35,073 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-07-09 17:40:35,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:35,073 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-07-09 17:40:35,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:35,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:35,074 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:35,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3696,771 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:35,274 INFO L430 AbstractCegarLoop]: === Iteration 777 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:35,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:35,274 INFO L82 PathProgramCache]: Analyzing trace with hash 453377370, now seen corresponding path program 771 times [2021-07-09 17:40:35,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:35,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251560343] [2021-07-09 17:40:35,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:35,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:35,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251560343] [2021-07-09 17:40:35,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251560343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:35,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201296012] [2021-07-09 17:40:35,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 772 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 772 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:35,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:40:35,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:35,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:40:35,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:35,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:35,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:35,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:35,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:35,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:35,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:35,641 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:35,693 INFO L628 ElimStorePlain]: treesize reduction 79, result has 46.6 percent of original size [2021-07-09 17:40:35,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:35,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:35,697 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:35,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:35,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:35,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:35,719 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:35,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:35,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:35,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:35,740 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:35,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:35,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:35,759 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:161, output treesize:32 [2021-07-09 17:40:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:35,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201296012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:35,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:35,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:35,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173262380] [2021-07-09 17:40:35,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:35,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:35,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:35,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:35,841 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:36,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:36,365 INFO L93 Difference]: Finished difference Result 285 states and 610 transitions. [2021-07-09 17:40:36,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:40:36,366 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:36,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:36,366 INFO L225 Difference]: With dead ends: 285 [2021-07-09 17:40:36,366 INFO L226 Difference]: Without dead ends: 273 [2021-07-09 17:40:36,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 604.9ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:40:36,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-07-09 17:40:36,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 245. [2021-07-09 17:40:36,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-07-09 17:40:36,368 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-07-09 17:40:36,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:36,369 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-07-09 17:40:36,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-07-09 17:40:36,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:36,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:36,369 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:36,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3699,772 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:36,569 INFO L430 AbstractCegarLoop]: === Iteration 778 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:36,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:36,570 INFO L82 PathProgramCache]: Analyzing trace with hash 577564578, now seen corresponding path program 772 times [2021-07-09 17:40:36,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:36,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40879073] [2021-07-09 17:40:36,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:36,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:36,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40879073] [2021-07-09 17:40:36,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40879073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:36,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887951974] [2021-07-09 17:40:36,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 773 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 773 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:36,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:36,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:36,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:36,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:36,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:36,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:36,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:36,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:36,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:36,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:36,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:36,943 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-07-09 17:40:36,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:36,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:40:36,945 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:36,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:36,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:40:36,952 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:40:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:37,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887951974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:37,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:37,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:37,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983111615] [2021-07-09 17:40:37,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:37,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:37,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:37,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:37,014 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:37,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:37,288 INFO L93 Difference]: Finished difference Result 267 states and 572 transitions. [2021-07-09 17:40:37,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:40:37,288 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:37,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:37,288 INFO L225 Difference]: With dead ends: 267 [2021-07-09 17:40:37,288 INFO L226 Difference]: Without dead ends: 254 [2021-07-09 17:40:37,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 420.6ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:40:37,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-09 17:40:37,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2021-07-09 17:40:37,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.182186234817814) internal successors, (539), 247 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:37,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 539 transitions. [2021-07-09 17:40:37,291 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 539 transitions. Word has length 20 [2021-07-09 17:40:37,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:37,291 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 539 transitions. [2021-07-09 17:40:37,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:37,291 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 539 transitions. [2021-07-09 17:40:37,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:37,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:37,291 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:37,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 773 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3704 [2021-07-09 17:40:37,492 INFO L430 AbstractCegarLoop]: === Iteration 779 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:37,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:37,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1713749850, now seen corresponding path program 773 times [2021-07-09 17:40:37,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:37,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728768913] [2021-07-09 17:40:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:37,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:37,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728768913] [2021-07-09 17:40:37,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728768913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:37,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112418765] [2021-07-09 17:40:37,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 774 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 774 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:37,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:40:37,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:37,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:37,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:37,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:37,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:37,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:37,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:37,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:37,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:37,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:37,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:37,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:37,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:37,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:37,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:37,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:37,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:37,859 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:37,912 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-07-09 17:40:37,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:37,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:37,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:37,916 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:37,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:37,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:37,919 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:37,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:37,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:37,955 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:40:38,027 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:38,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112418765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:38,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:38,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:40:38,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358139485] [2021-07-09 17:40:38,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:40:38,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:38,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:40:38,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:38,027 INFO L87 Difference]: Start difference. First operand 248 states and 539 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:38,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:38,393 INFO L93 Difference]: Finished difference Result 286 states and 599 transitions. [2021-07-09 17:40:38,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:40:38,393 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:38,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:38,394 INFO L225 Difference]: With dead ends: 286 [2021-07-09 17:40:38,394 INFO L226 Difference]: Without dead ends: 267 [2021-07-09 17:40:38,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 468.3ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:40:38,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-07-09 17:40:38,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 247. [2021-07-09 17:40:38,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.182926829268293) internal successors, (537), 246 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:38,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 537 transitions. [2021-07-09 17:40:38,396 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 537 transitions. Word has length 20 [2021-07-09 17:40:38,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:38,396 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 537 transitions. [2021-07-09 17:40:38,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:38,396 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 537 transitions. [2021-07-09 17:40:38,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:38,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:38,396 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:38,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3705,774 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:38,597 INFO L430 AbstractCegarLoop]: === Iteration 780 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:38,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:38,597 INFO L82 PathProgramCache]: Analyzing trace with hash -432420910, now seen corresponding path program 774 times [2021-07-09 17:40:38,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:38,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244451778] [2021-07-09 17:40:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:38,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:38,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244451778] [2021-07-09 17:40:38,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244451778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:38,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360117068] [2021-07-09 17:40:38,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 775 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 775 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:38,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:40:38,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:38,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:40:38,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:38,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:38,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:38,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:38,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:38,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:38,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:38,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:38,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:38,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:38,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:38,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:38,991 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:38,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:38,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:38,995 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:39,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:39,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:39,016 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:40:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:39,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360117068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:39,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:39,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:40:39,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394704721] [2021-07-09 17:40:39,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:40:39,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:39,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:40:39,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:39,086 INFO L87 Difference]: Start difference. First operand 247 states and 537 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:39,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:39,634 INFO L93 Difference]: Finished difference Result 273 states and 590 transitions. [2021-07-09 17:40:39,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:40:39,635 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:39,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:39,635 INFO L225 Difference]: With dead ends: 273 [2021-07-09 17:40:39,635 INFO L226 Difference]: Without dead ends: 264 [2021-07-09 17:40:39,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 636.3ms TimeCoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:40:39,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-07-09 17:40:39,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 246. [2021-07-09 17:40:39,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.183673469387755) internal successors, (535), 245 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:39,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 535 transitions. [2021-07-09 17:40:39,637 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 535 transitions. Word has length 20 [2021-07-09 17:40:39,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:39,637 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 535 transitions. [2021-07-09 17:40:39,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:39,637 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 535 transitions. [2021-07-09 17:40:39,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:39,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:39,638 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:39,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 775 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3708 [2021-07-09 17:40:39,838 INFO L430 AbstractCegarLoop]: === Iteration 781 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:39,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:39,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1755762266, now seen corresponding path program 775 times [2021-07-09 17:40:39,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:39,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832638971] [2021-07-09 17:40:39,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:40,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:40,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832638971] [2021-07-09 17:40:40,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832638971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:40,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342859497] [2021-07-09 17:40:40,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 776 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 776 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:40,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:40,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:40,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:40,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:40,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:40,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:40,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:40,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:40,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:40,329 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-07-09 17:40:40,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:40,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:40,345 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:40,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:40,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:40,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:40,371 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:40,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:40,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:40,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:40,396 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:40,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:40,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:40,417 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:40:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:40,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342859497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:40,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:40,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:40,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950282096] [2021-07-09 17:40:40,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:40,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:40,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:40,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:40,497 INFO L87 Difference]: Start difference. First operand 246 states and 535 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:41,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:41,136 INFO L93 Difference]: Finished difference Result 304 states and 640 transitions. [2021-07-09 17:40:41,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:40:41,137 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:41,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:41,137 INFO L225 Difference]: With dead ends: 304 [2021-07-09 17:40:41,137 INFO L226 Difference]: Without dead ends: 285 [2021-07-09 17:40:41,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 749.9ms TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:40:41,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-07-09 17:40:41,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 245. [2021-07-09 17:40:41,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:41,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-07-09 17:40:41,140 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-07-09 17:40:41,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:41,140 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-07-09 17:40:41,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:41,140 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-07-09 17:40:41,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:41,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:41,140 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:41,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 776 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3711 [2021-07-09 17:40:41,341 INFO L430 AbstractCegarLoop]: === Iteration 782 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:41,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:41,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1112378326, now seen corresponding path program 776 times [2021-07-09 17:40:41,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:41,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164372317] [2021-07-09 17:40:41,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:41,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:41,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:41,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:41,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164372317] [2021-07-09 17:40:41,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164372317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:41,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686027936] [2021-07-09 17:40:41,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 777 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 777 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:41,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:41,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:41,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:40:41,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:41,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:41,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:41,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:41,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:41,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:41,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:40:41,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:41,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:41,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:40:41,704 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:40:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:41,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686027936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:41,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:41,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:40:41,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681487526] [2021-07-09 17:40:41,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:40:41,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:41,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:40:41,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:40:41,722 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:41,925 INFO L93 Difference]: Finished difference Result 269 states and 576 transitions. [2021-07-09 17:40:41,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:40:41,925 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:41,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:41,926 INFO L225 Difference]: With dead ends: 269 [2021-07-09 17:40:41,926 INFO L226 Difference]: Without dead ends: 262 [2021-07-09 17:40:41,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 343.5ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:41,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-09 17:40:41,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 249. [2021-07-09 17:40:41,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.185483870967742) internal successors, (542), 248 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:41,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 542 transitions. [2021-07-09 17:40:41,928 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 542 transitions. Word has length 20 [2021-07-09 17:40:41,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:41,928 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 542 transitions. [2021-07-09 17:40:41,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:41,928 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 542 transitions. [2021-07-09 17:40:41,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:41,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:41,928 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:42,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 777 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3716 [2021-07-09 17:40:42,129 INFO L430 AbstractCegarLoop]: === Iteration 783 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:42,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:42,129 INFO L82 PathProgramCache]: Analyzing trace with hash 23806946, now seen corresponding path program 777 times [2021-07-09 17:40:42,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:42,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519943302] [2021-07-09 17:40:42,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:42,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:42,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519943302] [2021-07-09 17:40:42,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519943302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:42,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010887803] [2021-07-09 17:40:42,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 778 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 778 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:42,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:40:42,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:42,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:40:42,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:42,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:42,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:42,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:42,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:42,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:42,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:42,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:42,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:42,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:42,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:42,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:42,467 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:42,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:42,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:42,470 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:42,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:42,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:42,490 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:40:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:42,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010887803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:42,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:42,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:40:42,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573126544] [2021-07-09 17:40:42,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:40:42,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:42,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:40:42,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:42,573 INFO L87 Difference]: Start difference. First operand 249 states and 542 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:42,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:42,855 INFO L93 Difference]: Finished difference Result 276 states and 592 transitions. [2021-07-09 17:40:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:40:42,855 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:42,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:42,855 INFO L225 Difference]: With dead ends: 276 [2021-07-09 17:40:42,855 INFO L226 Difference]: Without dead ends: 269 [2021-07-09 17:40:42,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 351.4ms TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:40:42,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-07-09 17:40:42,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 248. [2021-07-09 17:40:42,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.182186234817814) internal successors, (539), 247 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:42,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 539 transitions. [2021-07-09 17:40:42,858 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 539 transitions. Word has length 20 [2021-07-09 17:40:42,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:42,858 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 539 transitions. [2021-07-09 17:40:42,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:42,858 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 539 transitions. [2021-07-09 17:40:42,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:42,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:42,859 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:43,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3717,778 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:43,059 INFO L430 AbstractCegarLoop]: === Iteration 784 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:43,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:43,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1898432346, now seen corresponding path program 778 times [2021-07-09 17:40:43,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:43,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397898599] [2021-07-09 17:40:43,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:40:43,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:43,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397898599] [2021-07-09 17:40:43,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397898599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:43,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87301602] [2021-07-09 17:40:43,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 779 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 779 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:43,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:43,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:43,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:40:43,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:40:43,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87301602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:43,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:43,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:40:43,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716751714] [2021-07-09 17:40:43,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:40:43,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:43,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:40:43,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:43,322 INFO L87 Difference]: Start difference. First operand 248 states and 539 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:43,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:43,709 INFO L93 Difference]: Finished difference Result 297 states and 637 transitions. [2021-07-09 17:40:43,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:40:43,709 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:43,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:43,710 INFO L225 Difference]: With dead ends: 297 [2021-07-09 17:40:43,710 INFO L226 Difference]: Without dead ends: 297 [2021-07-09 17:40:43,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 423.1ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:40:43,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-07-09 17:40:43,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 248. [2021-07-09 17:40:43,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.182186234817814) internal successors, (539), 247 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 539 transitions. [2021-07-09 17:40:43,712 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 539 transitions. Word has length 20 [2021-07-09 17:40:43,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:43,712 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 539 transitions. [2021-07-09 17:40:43,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:43,712 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 539 transitions. [2021-07-09 17:40:43,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:43,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:43,713 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:43,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3722,779 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:43,913 INFO L430 AbstractCegarLoop]: === Iteration 785 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:43,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:43,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2122363814, now seen corresponding path program 779 times [2021-07-09 17:40:43,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:43,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937416137] [2021-07-09 17:40:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:44,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:44,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937416137] [2021-07-09 17:40:44,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937416137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:44,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683448689] [2021-07-09 17:40:44,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 780 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 780 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:44,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:40:44,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:44,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:44,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:44,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:44,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:44,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:44,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:44,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:44,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:44,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:44,367 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:40:44,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:44,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:44,371 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:44,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:44,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:44,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:44,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:44,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:44,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:44,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:44,421 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:44,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:44,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:44,442 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:40:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:44,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683448689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:44,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:44,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:44,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317595373] [2021-07-09 17:40:44,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:44,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:44,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:44,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:44,525 INFO L87 Difference]: Start difference. First operand 248 states and 539 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:45,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:45,120 INFO L93 Difference]: Finished difference Result 303 states and 638 transitions. [2021-07-09 17:40:45,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:40:45,121 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:45,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:45,121 INFO L225 Difference]: With dead ends: 303 [2021-07-09 17:40:45,121 INFO L226 Difference]: Without dead ends: 284 [2021-07-09 17:40:45,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 720.6ms TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:40:45,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-07-09 17:40:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 247. [2021-07-09 17:40:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.182926829268293) internal successors, (537), 246 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 537 transitions. [2021-07-09 17:40:45,124 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 537 transitions. Word has length 20 [2021-07-09 17:40:45,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:45,124 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 537 transitions. [2021-07-09 17:40:45,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:45,124 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 537 transitions. [2021-07-09 17:40:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:45,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:45,124 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:45,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 780 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3734 [2021-07-09 17:40:45,325 INFO L430 AbstractCegarLoop]: === Iteration 786 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:45,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:45,325 INFO L82 PathProgramCache]: Analyzing trace with hash 65819362, now seen corresponding path program 780 times [2021-07-09 17:40:45,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:45,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582744727] [2021-07-09 17:40:45,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:45,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:45,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582744727] [2021-07-09 17:40:45,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582744727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:45,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964238488] [2021-07-09 17:40:45,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 781 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 781 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:45,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:40:45,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:45,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:40:45,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:45,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:45,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:45,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:45,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:45,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:45,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:45,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:45,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:45,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:45,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:45,811 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:45,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:45,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:45,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:45,833 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:45,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:45,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:45,851 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:40:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:45,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964238488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:45,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:45,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:45,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48140291] [2021-07-09 17:40:45,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:45,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:45,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:45,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:45,943 INFO L87 Difference]: Start difference. First operand 247 states and 537 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:46,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:46,546 INFO L93 Difference]: Finished difference Result 285 states and 606 transitions. [2021-07-09 17:40:46,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:40:46,546 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:46,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:46,546 INFO L225 Difference]: With dead ends: 285 [2021-07-09 17:40:46,546 INFO L226 Difference]: Without dead ends: 271 [2021-07-09 17:40:46,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 732.8ms TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:40:46,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-07-09 17:40:46,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 249. [2021-07-09 17:40:46,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.189516129032258) internal successors, (543), 248 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:46,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 543 transitions. [2021-07-09 17:40:46,549 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 543 transitions. Word has length 20 [2021-07-09 17:40:46,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:46,549 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 543 transitions. [2021-07-09 17:40:46,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:46,549 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 543 transitions. [2021-07-09 17:40:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:46,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:46,549 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:46,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 781 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3739 [2021-07-09 17:40:46,750 INFO L430 AbstractCegarLoop]: === Iteration 787 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:46,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:46,750 INFO L82 PathProgramCache]: Analyzing trace with hash -819978918, now seen corresponding path program 781 times [2021-07-09 17:40:46,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:46,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32889701] [2021-07-09 17:40:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:46,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:46,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32889701] [2021-07-09 17:40:46,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32889701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:46,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259573947] [2021-07-09 17:40:46,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 782 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 782 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:46,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:46,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:47,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:47,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:47,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:47,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:47,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:47,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:47,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:47,269 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-07-09 17:40:47,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:47,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:47,273 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:47,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:47,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:47,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:47,299 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:47,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:47,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:47,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:47,324 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:47,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:47,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:47,345 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:40:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:47,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259573947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:47,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:47,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:47,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858581321] [2021-07-09 17:40:47,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:47,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:47,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:47,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:47,429 INFO L87 Difference]: Start difference. First operand 249 states and 543 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:48,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:48,066 INFO L93 Difference]: Finished difference Result 311 states and 656 transitions. [2021-07-09 17:40:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:40:48,067 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:48,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:48,067 INFO L225 Difference]: With dead ends: 311 [2021-07-09 17:40:48,067 INFO L226 Difference]: Without dead ends: 292 [2021-07-09 17:40:48,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 758.9ms TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:40:48,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-07-09 17:40:48,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 249. [2021-07-09 17:40:48,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.189516129032258) internal successors, (543), 248 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:48,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 543 transitions. [2021-07-09 17:40:48,070 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 543 transitions. Word has length 20 [2021-07-09 17:40:48,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:48,070 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 543 transitions. [2021-07-09 17:40:48,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:48,070 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 543 transitions. [2021-07-09 17:40:48,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:48,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:48,070 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:48,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3746,782 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:48,271 INFO L430 AbstractCegarLoop]: === Iteration 788 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:48,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:48,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2124318238, now seen corresponding path program 782 times [2021-07-09 17:40:48,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:48,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228988206] [2021-07-09 17:40:48,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:48,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:48,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228988206] [2021-07-09 17:40:48,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228988206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:48,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703967422] [2021-07-09 17:40:48,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 783 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 783 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:48,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:48,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:48,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:40:48,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:48,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:48,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:48,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:48,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:48,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:48,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:48,678 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:48,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:48,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:40:48,683 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:40:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:48,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703967422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:48,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:48,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:40:48,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366424088] [2021-07-09 17:40:48,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:40:48,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:48,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:40:48,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:48,720 INFO L87 Difference]: Start difference. First operand 249 states and 543 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:48,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:48,973 INFO L93 Difference]: Finished difference Result 275 states and 589 transitions. [2021-07-09 17:40:48,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:40:48,973 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:48,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:48,974 INFO L225 Difference]: With dead ends: 275 [2021-07-09 17:40:48,974 INFO L226 Difference]: Without dead ends: 268 [2021-07-09 17:40:48,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 425.9ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:40:48,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-07-09 17:40:48,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 254. [2021-07-09 17:40:48,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.1897233201581026) internal successors, (554), 253 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:48,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 554 transitions. [2021-07-09 17:40:48,976 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 554 transitions. Word has length 20 [2021-07-09 17:40:48,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:48,976 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 554 transitions. [2021-07-09 17:40:48,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:48,976 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 554 transitions. [2021-07-09 17:40:48,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:48,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:48,977 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:49,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 783 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3751 [2021-07-09 17:40:49,177 INFO L430 AbstractCegarLoop]: === Iteration 789 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:49,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:49,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1262313174, now seen corresponding path program 783 times [2021-07-09 17:40:49,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:49,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612822526] [2021-07-09 17:40:49,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:49,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:49,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612822526] [2021-07-09 17:40:49,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612822526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:49,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159076835] [2021-07-09 17:40:49,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 784 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 784 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:49,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:40:49,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:49,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:40:49,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:49,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:49,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:49,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:49,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:49,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:49,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:49,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:49,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:49,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:49,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:49,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:49,572 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:49,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:49,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:49,575 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:49,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:49,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:49,592 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-07-09 17:40:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:49,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159076835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:49,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:49,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:49,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493802357] [2021-07-09 17:40:49,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:49,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:49,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:49,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:49,647 INFO L87 Difference]: Start difference. First operand 254 states and 554 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:50,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:50,162 INFO L93 Difference]: Finished difference Result 287 states and 612 transitions. [2021-07-09 17:40:50,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:40:50,163 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:50,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:50,163 INFO L225 Difference]: With dead ends: 287 [2021-07-09 17:40:50,163 INFO L226 Difference]: Without dead ends: 274 [2021-07-09 17:40:50,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 607.6ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:40:50,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-07-09 17:40:50,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 255. [2021-07-09 17:40:50,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.188976377952756) internal successors, (556), 254 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:50,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 556 transitions. [2021-07-09 17:40:50,166 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 556 transitions. Word has length 20 [2021-07-09 17:40:50,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:50,166 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 556 transitions. [2021-07-09 17:40:50,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:50,166 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 556 transitions. [2021-07-09 17:40:50,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:50,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:50,166 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:50,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3752,784 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:50,367 INFO L430 AbstractCegarLoop]: === Iteration 790 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:50,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:50,367 INFO L82 PathProgramCache]: Analyzing trace with hash -126127902, now seen corresponding path program 784 times [2021-07-09 17:40:50,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:50,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755789251] [2021-07-09 17:40:50,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:50,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:50,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755789251] [2021-07-09 17:40:50,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755789251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:50,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645908793] [2021-07-09 17:40:50,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 785 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 785 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:50,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:50,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:50,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:50,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:50,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:50,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:50,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:50,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:50,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:50,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:50,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:50,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:50,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:50,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:50,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:50,777 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:50,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:50,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:50,780 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:50,832 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-07-09 17:40:50,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:50,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:50,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:50,836 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:50,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:50,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:50,844 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:50,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:50,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:50,871 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:40:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:50,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645908793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:50,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:50,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:40:50,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480253038] [2021-07-09 17:40:50,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:40:50,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:50,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:40:50,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:50,955 INFO L87 Difference]: Start difference. First operand 255 states and 556 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:51,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:51,391 INFO L93 Difference]: Finished difference Result 286 states and 608 transitions. [2021-07-09 17:40:51,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:40:51,391 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:51,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:51,392 INFO L225 Difference]: With dead ends: 286 [2021-07-09 17:40:51,392 INFO L226 Difference]: Without dead ends: 274 [2021-07-09 17:40:51,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 574.6ms TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:40:51,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-07-09 17:40:51,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 254. [2021-07-09 17:40:51,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.1897233201581026) internal successors, (554), 253 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:51,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 554 transitions. [2021-07-09 17:40:51,394 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 554 transitions. Word has length 20 [2021-07-09 17:40:51,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:51,394 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 554 transitions. [2021-07-09 17:40:51,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:51,394 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 554 transitions. [2021-07-09 17:40:51,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:51,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:51,395 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:51,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3755,785 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:51,595 INFO L430 AbstractCegarLoop]: === Iteration 791 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:51,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:51,595 INFO L82 PathProgramCache]: Analyzing trace with hash 925870002, now seen corresponding path program 785 times [2021-07-09 17:40:51,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:51,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487801195] [2021-07-09 17:40:51,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:51,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:51,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487801195] [2021-07-09 17:40:51,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487801195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:51,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294571455] [2021-07-09 17:40:51,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 786 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 786 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:51,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:40:51,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:51,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:51,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:51,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:51,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:51,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:51,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:51,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:51,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:51,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:52,002 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:40:52,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:52,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:52,005 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:52,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:52,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:40:52,013 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:40:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:52,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294571455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:52,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:52,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:40:52,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621304643] [2021-07-09 17:40:52,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:40:52,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:52,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:40:52,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:52,053 INFO L87 Difference]: Start difference. First operand 254 states and 554 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:52,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:52,435 INFO L93 Difference]: Finished difference Result 276 states and 593 transitions. [2021-07-09 17:40:52,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:40:52,435 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:52,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:52,435 INFO L225 Difference]: With dead ends: 276 [2021-07-09 17:40:52,435 INFO L226 Difference]: Without dead ends: 263 [2021-07-09 17:40:52,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 471.7ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:40:52,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-07-09 17:40:52,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 256. [2021-07-09 17:40:52,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.1882352941176473) internal successors, (558), 255 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:52,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 558 transitions. [2021-07-09 17:40:52,438 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 558 transitions. Word has length 20 [2021-07-09 17:40:52,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:52,438 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 558 transitions. [2021-07-09 17:40:52,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:52,438 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 558 transitions. [2021-07-09 17:40:52,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:52,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:52,438 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:52,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3758,786 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:52,639 INFO L430 AbstractCegarLoop]: === Iteration 792 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:52,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:52,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2062055274, now seen corresponding path program 786 times [2021-07-09 17:40:52,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:52,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074516175] [2021-07-09 17:40:52,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:52,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:52,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074516175] [2021-07-09 17:40:52,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074516175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:52,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445595248] [2021-07-09 17:40:52,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 787 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 787 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:52,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:40:52,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:52,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:52,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:53,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:53,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:53,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:53,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:53,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:53,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:53,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:53,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:53,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:53,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:53,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:53,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:53,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:53,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:53,027 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:53,078 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-07-09 17:40:53,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:53,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:53,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:53,082 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:53,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:53,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:53,086 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:53,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:53,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:53,108 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:40:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:53,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445595248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:53,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:53,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:40:53,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57908270] [2021-07-09 17:40:53,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:40:53,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:53,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:40:53,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:53,185 INFO L87 Difference]: Start difference. First operand 256 states and 558 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:53,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:53,716 INFO L93 Difference]: Finished difference Result 296 states and 622 transitions. [2021-07-09 17:40:53,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:40:53,716 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:53,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:53,716 INFO L225 Difference]: With dead ends: 296 [2021-07-09 17:40:53,716 INFO L226 Difference]: Without dead ends: 277 [2021-07-09 17:40:53,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 660.0ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:40:53,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-07-09 17:40:53,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 255. [2021-07-09 17:40:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.188976377952756) internal successors, (556), 254 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 556 transitions. [2021-07-09 17:40:53,719 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 556 transitions. Word has length 20 [2021-07-09 17:40:53,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:53,719 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 556 transitions. [2021-07-09 17:40:53,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:53,719 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 556 transitions. [2021-07-09 17:40:53,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:53,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:53,719 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:53,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 787 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3759 [2021-07-09 17:40:53,920 INFO L430 AbstractCegarLoop]: === Iteration 793 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:53,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:53,920 INFO L82 PathProgramCache]: Analyzing trace with hash -84115486, now seen corresponding path program 787 times [2021-07-09 17:40:53,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:53,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518911033] [2021-07-09 17:40:53,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:53,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:54,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:54,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518911033] [2021-07-09 17:40:54,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518911033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:54,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583343186] [2021-07-09 17:40:54,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 788 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 788 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:54,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:54,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:54,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:54,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:54,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:54,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:54,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:54,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:54,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:54,331 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-07-09 17:40:54,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:54,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:54,334 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:54,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:54,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:54,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:54,359 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:54,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:54,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:54,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:54,383 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:54,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:54,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:54,403 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:40:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:54,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583343186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:54,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:54,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:54,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742260795] [2021-07-09 17:40:54,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:54,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:54,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:54,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:54,480 INFO L87 Difference]: Start difference. First operand 255 states and 556 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:54,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:54,817 INFO L93 Difference]: Finished difference Result 287 states and 618 transitions. [2021-07-09 17:40:54,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:40:54,817 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:54,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:54,817 INFO L225 Difference]: With dead ends: 287 [2021-07-09 17:40:54,817 INFO L226 Difference]: Without dead ends: 275 [2021-07-09 17:40:54,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 469.3ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:40:54,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-07-09 17:40:54,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 254. [2021-07-09 17:40:54,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.1897233201581026) internal successors, (554), 253 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 554 transitions. [2021-07-09 17:40:54,820 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 554 transitions. Word has length 20 [2021-07-09 17:40:54,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:54,820 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 554 transitions. [2021-07-09 17:40:54,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:54,820 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 554 transitions. [2021-07-09 17:40:54,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:54,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:54,820 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:55,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3762,788 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:55,021 INFO L430 AbstractCegarLoop]: === Iteration 794 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:55,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:55,021 INFO L82 PathProgramCache]: Analyzing trace with hash 40071722, now seen corresponding path program 788 times [2021-07-09 17:40:55,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:55,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451062463] [2021-07-09 17:40:55,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:55,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:55,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451062463] [2021-07-09 17:40:55,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451062463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:55,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078883573] [2021-07-09 17:40:55,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 789 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 789 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:55,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:55,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:55,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:40:55,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:55,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:55,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:40:55,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:55,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:55,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:55,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:55,363 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:55,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:55,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:40:55,369 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-07-09 17:40:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:55,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078883573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:55,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:55,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:40:55,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970088771] [2021-07-09 17:40:55,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:40:55,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:55,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:40:55,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:40:55,390 INFO L87 Difference]: Start difference. First operand 254 states and 554 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:55,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:55,608 INFO L93 Difference]: Finished difference Result 273 states and 587 transitions. [2021-07-09 17:40:55,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:40:55,608 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:55,608 INFO L225 Difference]: With dead ends: 273 [2021-07-09 17:40:55,608 INFO L226 Difference]: Without dead ends: 266 [2021-07-09 17:40:55,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 327.9ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:55,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-07-09 17:40:55,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 257. [2021-07-09 17:40:55,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.19140625) internal successors, (561), 256 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 561 transitions. [2021-07-09 17:40:55,611 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 561 transitions. Word has length 20 [2021-07-09 17:40:55,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:55,611 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 561 transitions. [2021-07-09 17:40:55,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:55,611 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 561 transitions. [2021-07-09 17:40:55,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:55,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:55,611 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:55,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3767,789 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:55,812 INFO L430 AbstractCegarLoop]: === Iteration 795 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:55,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:55,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1176256994, now seen corresponding path program 789 times [2021-07-09 17:40:55,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:55,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569292997] [2021-07-09 17:40:55,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:55,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:55,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569292997] [2021-07-09 17:40:55,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569292997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:55,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316451321] [2021-07-09 17:40:55,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 790 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 790 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:56,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:40:56,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:56,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:40:56,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:56,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:56,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:56,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:56,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:56,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:56,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:56,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:56,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:56,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:56,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:56,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:56,160 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:56,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:56,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:56,163 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:56,208 INFO L628 ElimStorePlain]: treesize reduction 74, result has 43.9 percent of original size [2021-07-09 17:40:56,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:56,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:56,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:56,212 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:56,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:56,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:56,215 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:56,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:56,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:56,238 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:161, output treesize:32 [2021-07-09 17:40:56,315 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:56,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316451321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:56,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:56,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:40:56,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840571062] [2021-07-09 17:40:56,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:40:56,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:56,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:40:56,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:56,316 INFO L87 Difference]: Start difference. First operand 257 states and 561 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:56,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:56,695 INFO L93 Difference]: Finished difference Result 302 states and 636 transitions. [2021-07-09 17:40:56,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:40:56,695 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:56,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:56,695 INFO L225 Difference]: With dead ends: 302 [2021-07-09 17:40:56,695 INFO L226 Difference]: Without dead ends: 286 [2021-07-09 17:40:56,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 492.9ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:40:56,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-07-09 17:40:56,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 256. [2021-07-09 17:40:56,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.1882352941176473) internal successors, (558), 255 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:56,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 558 transitions. [2021-07-09 17:40:56,698 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 558 transitions. Word has length 20 [2021-07-09 17:40:56,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:56,698 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 558 transitions. [2021-07-09 17:40:56,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:56,698 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 558 transitions. [2021-07-09 17:40:56,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:56,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:56,698 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:56,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 790 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3768 [2021-07-09 17:40:56,899 INFO L430 AbstractCegarLoop]: === Iteration 796 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:56,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:56,899 INFO L82 PathProgramCache]: Analyzing trace with hash -969913766, now seen corresponding path program 790 times [2021-07-09 17:40:56,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:56,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375009484] [2021-07-09 17:40:56,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:57,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:57,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375009484] [2021-07-09 17:40:57,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375009484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:57,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708913368] [2021-07-09 17:40:57,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 791 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 791 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:57,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:57,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:57,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:57,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:57,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:57,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:57,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:57,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:57,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:57,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:57,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:57,359 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:40:57,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:57,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:40:57,363 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:57,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:57,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:57,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:57,389 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:57,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:57,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:57,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:57,413 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:57,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:57,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:57,437 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:40:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:57,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708913368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:57,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:57,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:57,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922601952] [2021-07-09 17:40:57,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:57,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:57,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:57,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:57,514 INFO L87 Difference]: Start difference. First operand 256 states and 558 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:58,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:58,092 INFO L93 Difference]: Finished difference Result 306 states and 647 transitions. [2021-07-09 17:40:58,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:40:58,093 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:58,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:58,093 INFO L225 Difference]: With dead ends: 306 [2021-07-09 17:40:58,093 INFO L226 Difference]: Without dead ends: 287 [2021-07-09 17:40:58,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 708.2ms TimeCoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:40:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-07-09 17:40:58,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 256. [2021-07-09 17:40:58,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.1882352941176473) internal successors, (558), 255 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:58,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 558 transitions. [2021-07-09 17:40:58,096 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 558 transitions. Word has length 20 [2021-07-09 17:40:58,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:58,096 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 558 transitions. [2021-07-09 17:40:58,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:58,096 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 558 transitions. [2021-07-09 17:40:58,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:58,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:58,096 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:58,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3772,791 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:58,297 INFO L430 AbstractCegarLoop]: === Iteration 797 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:58,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:58,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1218269410, now seen corresponding path program 791 times [2021-07-09 17:40:58,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:58,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649798959] [2021-07-09 17:40:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:58,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:58,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649798959] [2021-07-09 17:40:58,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649798959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:58,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940773126] [2021-07-09 17:40:58,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 792 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 792 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:58,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:40:58,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:58,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:40:58,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:58,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:58,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:58,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:58,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:58,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:58,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:58,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:58,794 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-07-09 17:40:58,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:58,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:40:58,797 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:58,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:58,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:58,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:58,821 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:58,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:58,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:58,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:40:58,845 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:40:58,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:58,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:58,865 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:40:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:58,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940773126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:58,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:58,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:40:58,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634640094] [2021-07-09 17:40:58,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:40:58,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:58,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:40:58,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:40:58,946 INFO L87 Difference]: Start difference. First operand 256 states and 558 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:59,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:59,546 INFO L93 Difference]: Finished difference Result 311 states and 657 transitions. [2021-07-09 17:40:59,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:40:59,546 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:40:59,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:59,547 INFO L225 Difference]: With dead ends: 311 [2021-07-09 17:40:59,547 INFO L226 Difference]: Without dead ends: 292 [2021-07-09 17:40:59,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 800.3ms TimeCoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:40:59,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-07-09 17:40:59,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 256. [2021-07-09 17:40:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.1882352941176473) internal successors, (558), 255 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 558 transitions. [2021-07-09 17:40:59,549 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 558 transitions. Word has length 20 [2021-07-09 17:40:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:59,549 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 558 transitions. [2021-07-09 17:40:59,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 558 transitions. [2021-07-09 17:40:59,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:40:59,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:59,550 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:59,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3777,792 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:59,750 INFO L430 AbstractCegarLoop]: === Iteration 798 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:59,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:59,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1649871182, now seen corresponding path program 792 times [2021-07-09 17:40:59,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:59,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959538958] [2021-07-09 17:40:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:59,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:59,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:59,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959538958] [2021-07-09 17:40:59,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959538958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:59,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378137295] [2021-07-09 17:40:59,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 793 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 793 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:59,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:40:59,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:59,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:40:59,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:00,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:00,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:00,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:00,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:00,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:00,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:00,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:00,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:00,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:00,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:00,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:00,102 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:00,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:00,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:00,105 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:00,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:00,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:00,121 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-07-09 17:41:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:00,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378137295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:00,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:00,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:41:00,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103074621] [2021-07-09 17:41:00,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:41:00,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:00,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:41:00,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:41:00,172 INFO L87 Difference]: Start difference. First operand 256 states and 558 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:00,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:00,503 INFO L93 Difference]: Finished difference Result 279 states and 599 transitions. [2021-07-09 17:41:00,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:41:00,504 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:00,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:00,504 INFO L225 Difference]: With dead ends: 279 [2021-07-09 17:41:00,504 INFO L226 Difference]: Without dead ends: 266 [2021-07-09 17:41:00,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 419.1ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:41:00,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-07-09 17:41:00,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 260. [2021-07-09 17:41:00,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.1853281853281854) internal successors, (566), 259 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 566 transitions. [2021-07-09 17:41:00,506 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 566 transitions. Word has length 20 [2021-07-09 17:41:00,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:00,507 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 566 transitions. [2021-07-09 17:41:00,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:00,507 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 566 transitions. [2021-07-09 17:41:00,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:00,507 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:00,507 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:00,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 793 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3782 [2021-07-09 17:41:00,707 INFO L430 AbstractCegarLoop]: === Iteration 799 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:00,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:00,708 INFO L82 PathProgramCache]: Analyzing trace with hash -513685910, now seen corresponding path program 793 times [2021-07-09 17:41:00,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:00,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231760124] [2021-07-09 17:41:00,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:00,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:00,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231760124] [2021-07-09 17:41:00,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231760124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:00,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391809045] [2021-07-09 17:41:00,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 794 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 794 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:00,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:00,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:00,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:01,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:01,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:01,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:01,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:01,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:01,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:01,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:01,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:01,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:01,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:01,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:01,058 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:01,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:01,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:01,061 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:01,115 INFO L628 ElimStorePlain]: treesize reduction 83, result has 44.7 percent of original size [2021-07-09 17:41:01,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:01,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:01,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:01,120 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:01,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:01,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:01,123 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:01,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:01,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:01,145 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:01,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391809045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:01,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:01,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:01,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788980375] [2021-07-09 17:41:01,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:01,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:01,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:01,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:01,217 INFO L87 Difference]: Start difference. First operand 260 states and 566 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:01,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:01,537 INFO L93 Difference]: Finished difference Result 299 states and 628 transitions. [2021-07-09 17:41:01,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:41:01,538 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:01,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:01,538 INFO L225 Difference]: With dead ends: 299 [2021-07-09 17:41:01,538 INFO L226 Difference]: Without dead ends: 280 [2021-07-09 17:41:01,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 460.6ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:41:01,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-07-09 17:41:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 259. [2021-07-09 17:41:01,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.186046511627907) internal successors, (564), 258 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 564 transitions. [2021-07-09 17:41:01,541 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 564 transitions. Word has length 20 [2021-07-09 17:41:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:01,541 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 564 transitions. [2021-07-09 17:41:01,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 564 transitions. [2021-07-09 17:41:01,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:01,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:01,541 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:01,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3785,794 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:01,742 INFO L430 AbstractCegarLoop]: === Iteration 800 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:01,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:01,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1635110626, now seen corresponding path program 794 times [2021-07-09 17:41:01,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:01,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628825643] [2021-07-09 17:41:01,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:01,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:01,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:01,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628825643] [2021-07-09 17:41:01,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628825643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:01,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532426926] [2021-07-09 17:41:01,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 795 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 795 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:01,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:01,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:01,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:41:01,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:02,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:02,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:02,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:02,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:02,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:02,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:02,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:02,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:02,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:02,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:02,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:02,079 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:02,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:02,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:02,082 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:02,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:02,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:02,102 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:41:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:02,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532426926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:02,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:02,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:41:02,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957571342] [2021-07-09 17:41:02,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:41:02,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:02,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:41:02,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:41:02,172 INFO L87 Difference]: Start difference. First operand 259 states and 564 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:02,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:02,459 INFO L93 Difference]: Finished difference Result 278 states and 600 transitions. [2021-07-09 17:41:02,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:41:02,459 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:02,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:02,460 INFO L225 Difference]: With dead ends: 278 [2021-07-09 17:41:02,460 INFO L226 Difference]: Without dead ends: 271 [2021-07-09 17:41:02,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 381.0ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:41:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-07-09 17:41:02,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 259. [2021-07-09 17:41:02,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.186046511627907) internal successors, (564), 258 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:02,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 564 transitions. [2021-07-09 17:41:02,462 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 564 transitions. Word has length 20 [2021-07-09 17:41:02,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:02,462 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 564 transitions. [2021-07-09 17:41:02,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:02,462 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 564 transitions. [2021-07-09 17:41:02,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:02,463 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:02,463 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:02,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3788,795 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:02,663 INFO L430 AbstractCegarLoop]: === Iteration 801 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:02,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:02,663 INFO L82 PathProgramCache]: Analyzing trace with hash -471673494, now seen corresponding path program 795 times [2021-07-09 17:41:02,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:02,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765571118] [2021-07-09 17:41:02,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:02,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:02,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765571118] [2021-07-09 17:41:02,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765571118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:02,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824164356] [2021-07-09 17:41:02,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 796 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 796 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:02,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:41:02,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:02,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:41:02,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:03,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:03,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:03,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:03,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:03,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:03,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:03,120 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:03,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:03,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:03,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:03,145 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:03,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:03,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:03,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:03,170 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:03,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:03,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:03,189 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:41:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:03,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824164356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:03,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:03,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:41:03,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020274376] [2021-07-09 17:41:03,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:41:03,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:03,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:41:03,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:41:03,277 INFO L87 Difference]: Start difference. First operand 259 states and 564 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:03,747 INFO L93 Difference]: Finished difference Result 290 states and 619 transitions. [2021-07-09 17:41:03,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:41:03,747 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:03,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:03,747 INFO L225 Difference]: With dead ends: 290 [2021-07-09 17:41:03,747 INFO L226 Difference]: Without dead ends: 276 [2021-07-09 17:41:03,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 645.0ms TimeCoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:41:03,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-07-09 17:41:03,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 259. [2021-07-09 17:41:03,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.186046511627907) internal successors, (564), 258 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:03,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 564 transitions. [2021-07-09 17:41:03,750 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 564 transitions. Word has length 20 [2021-07-09 17:41:03,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:03,750 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 564 transitions. [2021-07-09 17:41:03,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:03,750 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 564 transitions. [2021-07-09 17:41:03,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:03,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:03,750 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:03,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 796 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3791 [2021-07-09 17:41:03,951 INFO L430 AbstractCegarLoop]: === Iteration 802 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:03,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:03,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1357471774, now seen corresponding path program 796 times [2021-07-09 17:41:03,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:03,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965958826] [2021-07-09 17:41:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:04,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:04,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965958826] [2021-07-09 17:41:04,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965958826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:04,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524411799] [2021-07-09 17:41:04,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 797 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 797 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:04,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:04,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:04,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:04,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:04,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:04,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:04,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:04,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:04,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:04,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:04,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:04,458 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-07-09 17:41:04,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:04,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:04,462 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:04,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:04,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:04,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:04,488 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:04,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:04,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:04,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:04,513 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:04,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:04,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:04,536 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:04,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524411799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:04,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:04,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:41:04,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003541225] [2021-07-09 17:41:04,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:41:04,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:04,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:41:04,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:41:04,620 INFO L87 Difference]: Start difference. First operand 259 states and 564 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:05,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:05,162 INFO L93 Difference]: Finished difference Result 317 states and 669 transitions. [2021-07-09 17:41:05,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:41:05,163 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:05,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:05,163 INFO L225 Difference]: With dead ends: 317 [2021-07-09 17:41:05,163 INFO L226 Difference]: Without dead ends: 298 [2021-07-09 17:41:05,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 692.3ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:41:05,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-07-09 17:41:05,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 259. [2021-07-09 17:41:05,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.186046511627907) internal successors, (564), 258 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 564 transitions. [2021-07-09 17:41:05,166 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 564 transitions. Word has length 20 [2021-07-09 17:41:05,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:05,166 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 564 transitions. [2021-07-09 17:41:05,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:05,166 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 564 transitions. [2021-07-09 17:41:05,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:05,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:05,166 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:05,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 797 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3798 [2021-07-09 17:41:05,367 INFO L430 AbstractCegarLoop]: === Iteration 803 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:05,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:05,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1796473642, now seen corresponding path program 797 times [2021-07-09 17:41:05,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:05,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371868951] [2021-07-09 17:41:05,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:05,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:05,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371868951] [2021-07-09 17:41:05,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371868951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:05,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409222674] [2021-07-09 17:41:05,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 798 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 798 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:05,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:41:05,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:05,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:05,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:05,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:05,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:05,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:05,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:05,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:05,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:05,756 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:05,777 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:41:05,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:05,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:05,780 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:05,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:05,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:41:05,787 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:41:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:05,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409222674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:05,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:05,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:05,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088630172] [2021-07-09 17:41:05,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:05,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:05,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:05,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:05,823 INFO L87 Difference]: Start difference. First operand 259 states and 564 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:06,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:06,090 INFO L93 Difference]: Finished difference Result 283 states and 607 transitions. [2021-07-09 17:41:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:41:06,091 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:06,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:06,091 INFO L225 Difference]: With dead ends: 283 [2021-07-09 17:41:06,091 INFO L226 Difference]: Without dead ends: 270 [2021-07-09 17:41:06,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 418.8ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:41:06,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-07-09 17:41:06,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 264. [2021-07-09 17:41:06,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.182509505703422) internal successors, (574), 263 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:06,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 574 transitions. [2021-07-09 17:41:06,093 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 574 transitions. Word has length 20 [2021-07-09 17:41:06,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:06,094 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 574 transitions. [2021-07-09 17:41:06,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:06,094 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 574 transitions. [2021-07-09 17:41:06,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:06,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:06,094 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:06,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3803,798 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:06,294 INFO L430 AbstractCegarLoop]: === Iteration 804 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:06,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:06,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1362308382, now seen corresponding path program 798 times [2021-07-09 17:41:06,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:06,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113817902] [2021-07-09 17:41:06,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:06,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:06,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113817902] [2021-07-09 17:41:06,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113817902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:06,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912207524] [2021-07-09 17:41:06,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 799 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 799 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:06,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:41:06,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:06,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:41:06,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:06,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:06,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:06,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:06,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:06,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:06,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:06,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:06,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:06,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:06,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:06,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:06,687 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:06,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:06,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:06,691 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:06,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:06,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:06,711 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:41:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:06,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912207524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:06,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:06,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:41:06,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363119125] [2021-07-09 17:41:06,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:41:06,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:06,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:41:06,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:41:06,810 INFO L87 Difference]: Start difference. First operand 264 states and 574 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:07,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:07,107 INFO L93 Difference]: Finished difference Result 281 states and 606 transitions. [2021-07-09 17:41:07,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:41:07,108 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:07,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:07,108 INFO L225 Difference]: With dead ends: 281 [2021-07-09 17:41:07,108 INFO L226 Difference]: Without dead ends: 274 [2021-07-09 17:41:07,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 458.0ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:41:07,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-07-09 17:41:07,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 263. [2021-07-09 17:41:07,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.183206106870229) internal successors, (572), 262 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:07,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 572 transitions. [2021-07-09 17:41:07,110 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 572 transitions. Word has length 20 [2021-07-09 17:41:07,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:07,111 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 572 transitions. [2021-07-09 17:41:07,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:07,111 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 572 transitions. [2021-07-09 17:41:07,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:07,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:07,111 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:07,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 799 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3804 [2021-07-09 17:41:07,311 INFO L430 AbstractCegarLoop]: === Iteration 805 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:07,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:07,311 INFO L82 PathProgramCache]: Analyzing trace with hash 786488154, now seen corresponding path program 799 times [2021-07-09 17:41:07,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:07,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346065186] [2021-07-09 17:41:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:07,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:07,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346065186] [2021-07-09 17:41:07,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346065186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:07,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349875601] [2021-07-09 17:41:07,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 800 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 800 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:07,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:07,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:07,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:07,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:07,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:07,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:07,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:07,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:07,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:07,798 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:41:07,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:07,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:07,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:07,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:07,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:07,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:07,826 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:07,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:07,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:07,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:07,850 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:07,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:07,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:07,872 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:07,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349875601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:07,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:07,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:41:07,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619499522] [2021-07-09 17:41:07,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:41:07,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:07,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:41:07,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:41:07,952 INFO L87 Difference]: Start difference. First operand 263 states and 572 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:08,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:08,415 INFO L93 Difference]: Finished difference Result 311 states and 657 transitions. [2021-07-09 17:41:08,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:41:08,415 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:08,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:08,415 INFO L225 Difference]: With dead ends: 311 [2021-07-09 17:41:08,415 INFO L226 Difference]: Without dead ends: 292 [2021-07-09 17:41:08,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 650.1ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:41:08,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-07-09 17:41:08,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 262. [2021-07-09 17:41:08,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.1839080459770117) internal successors, (570), 261 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:08,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 570 transitions. [2021-07-09 17:41:08,418 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 570 transitions. Word has length 20 [2021-07-09 17:41:08,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:08,418 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 570 transitions. [2021-07-09 17:41:08,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:08,418 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 570 transitions. [2021-07-09 17:41:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:08,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:08,418 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:08,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3809,800 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:08,619 INFO L430 AbstractCegarLoop]: === Iteration 806 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:08,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:08,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1320295966, now seen corresponding path program 800 times [2021-07-09 17:41:08,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:08,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188416396] [2021-07-09 17:41:08,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:08,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:08,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188416396] [2021-07-09 17:41:08,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188416396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:08,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680186229] [2021-07-09 17:41:08,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 801 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 801 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:08,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:08,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:08,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:41:08,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:09,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:09,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:09,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:09,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:09,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:09,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:09,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:09,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:09,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:09,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:09,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:09,041 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:09,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:09,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:09,045 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:09,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:09,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:09,065 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:41:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:09,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680186229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:09,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:09,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:41:09,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117539614] [2021-07-09 17:41:09,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:41:09,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:09,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:41:09,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:41:09,147 INFO L87 Difference]: Start difference. First operand 262 states and 570 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:10,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:10,083 INFO L93 Difference]: Finished difference Result 354 states and 733 transitions. [2021-07-09 17:41:10,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:41:10,083 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:10,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:10,083 INFO L225 Difference]: With dead ends: 354 [2021-07-09 17:41:10,083 INFO L226 Difference]: Without dead ends: 324 [2021-07-09 17:41:10,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1001.2ms TimeCoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:41:10,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-07-09 17:41:10,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 265. [2021-07-09 17:41:10,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.1931818181818183) internal successors, (579), 264 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:10,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 579 transitions. [2021-07-09 17:41:10,086 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 579 transitions. Word has length 20 [2021-07-09 17:41:10,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:10,086 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 579 transitions. [2021-07-09 17:41:10,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:10,086 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 579 transitions. [2021-07-09 17:41:10,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:10,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:10,086 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:10,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 801 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3814 [2021-07-09 17:41:10,287 INFO L430 AbstractCegarLoop]: === Iteration 807 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:10,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:10,287 INFO L82 PathProgramCache]: Analyzing trace with hash 2088873050, now seen corresponding path program 801 times [2021-07-09 17:41:10,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:10,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849280927] [2021-07-09 17:41:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:10,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:10,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849280927] [2021-07-09 17:41:10,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849280927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:10,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437380967] [2021-07-09 17:41:10,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 802 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 802 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:10,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:41:10,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:10,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:10,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:10,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:10,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:10,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:10,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:10,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:10,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:10,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:10,820 INFO L628 ElimStorePlain]: treesize reduction 91, result has 42.0 percent of original size [2021-07-09 17:41:10,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:10,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:10,824 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:10,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:10,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:41:10,848 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:10,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:10,871 INFO L518 ElimStorePlain]: Eliminatee v_prenex_661 vanished before elimination [2021-07-09 17:41:10,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:10,872 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:173, output treesize:36 [2021-07-09 17:41:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:10,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437380967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:10,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:10,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:41:10,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412435625] [2021-07-09 17:41:10,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:41:10,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:10,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:41:10,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:41:10,956 INFO L87 Difference]: Start difference. First operand 265 states and 579 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:11,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:11,996 INFO L93 Difference]: Finished difference Result 383 states and 786 transitions. [2021-07-09 17:41:11,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:41:11,996 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:11,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:11,996 INFO L225 Difference]: With dead ends: 383 [2021-07-09 17:41:11,997 INFO L226 Difference]: Without dead ends: 343 [2021-07-09 17:41:11,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1134.3ms TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:41:11,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-07-09 17:41:11,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 265. [2021-07-09 17:41:11,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.1931818181818183) internal successors, (579), 264 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:11,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 579 transitions. [2021-07-09 17:41:11,999 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 579 transitions. Word has length 20 [2021-07-09 17:41:11,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:11,999 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 579 transitions. [2021-07-09 17:41:11,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:11,999 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 579 transitions. [2021-07-09 17:41:11,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:11,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:12,000 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:12,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3817,802 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:12,200 INFO L430 AbstractCegarLoop]: === Iteration 808 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:12,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:12,200 INFO L82 PathProgramCache]: Analyzing trace with hash 398930146, now seen corresponding path program 802 times [2021-07-09 17:41:12,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:12,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054493877] [2021-07-09 17:41:12,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:12,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:12,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054493877] [2021-07-09 17:41:12,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054493877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:12,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823355241] [2021-07-09 17:41:12,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 803 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 803 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:12,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:12,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:12,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:12,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:12,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:12,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:12,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:12,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:12,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:12,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:12,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:12,762 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:41:12,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:12,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:12,766 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:12,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:12,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:12,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:12,791 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:12,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:12,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:12,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:12,814 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:12,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:12,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:12,834 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:12,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823355241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:12,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:12,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:12,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499839] [2021-07-09 17:41:12,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:12,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:12,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:12,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:12,914 INFO L87 Difference]: Start difference. First operand 265 states and 579 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:13,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:13,386 INFO L93 Difference]: Finished difference Result 323 states and 684 transitions. [2021-07-09 17:41:13,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:41:13,386 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:13,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:13,387 INFO L225 Difference]: With dead ends: 323 [2021-07-09 17:41:13,387 INFO L226 Difference]: Without dead ends: 304 [2021-07-09 17:41:13,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 660.1ms TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:41:13,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-07-09 17:41:13,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 266. [2021-07-09 17:41:13,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.1962264150943396) internal successors, (582), 265 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:13,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 582 transitions. [2021-07-09 17:41:13,389 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 582 transitions. Word has length 20 [2021-07-09 17:41:13,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:13,389 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 582 transitions. [2021-07-09 17:41:13,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:13,390 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 582 transitions. [2021-07-09 17:41:13,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:13,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:13,390 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:13,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 803 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3822 [2021-07-09 17:41:13,590 INFO L430 AbstractCegarLoop]: === Iteration 809 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:13,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:13,590 INFO L82 PathProgramCache]: Analyzing trace with hash -816653578, now seen corresponding path program 803 times [2021-07-09 17:41:13,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:13,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286731813] [2021-07-09 17:41:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:13,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:13,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286731813] [2021-07-09 17:41:13,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286731813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:13,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150585985] [2021-07-09 17:41:13,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 804 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 804 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:13,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:41:13,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:13,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:13,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:13,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:13,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:13,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:13,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:13,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:13,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:13,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:13,989 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:41:13,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:13,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:13,992 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:13,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:14,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:41:14,002 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:41:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:14,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150585985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:14,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:14,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:41:14,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385770148] [2021-07-09 17:41:14,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:41:14,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:14,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:41:14,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:41:14,041 INFO L87 Difference]: Start difference. First operand 266 states and 582 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:14,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:14,363 INFO L93 Difference]: Finished difference Result 308 states and 649 transitions. [2021-07-09 17:41:14,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:41:14,363 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:14,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:14,363 INFO L225 Difference]: With dead ends: 308 [2021-07-09 17:41:14,363 INFO L226 Difference]: Without dead ends: 277 [2021-07-09 17:41:14,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 427.6ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:41:14,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-07-09 17:41:14,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 268. [2021-07-09 17:41:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.194756554307116) internal successors, (586), 267 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:14,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 586 transitions. [2021-07-09 17:41:14,366 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 586 transitions. Word has length 20 [2021-07-09 17:41:14,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:14,366 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 586 transitions. [2021-07-09 17:41:14,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:14,366 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 586 transitions. [2021-07-09 17:41:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:14,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:14,366 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:14,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 804 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3827 [2021-07-09 17:41:14,567 INFO L430 AbstractCegarLoop]: === Iteration 810 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:14,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:14,567 INFO L82 PathProgramCache]: Analyzing trace with hash 135699630, now seen corresponding path program 804 times [2021-07-09 17:41:14,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:14,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189003185] [2021-07-09 17:41:14,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:14,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:14,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189003185] [2021-07-09 17:41:14,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189003185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:14,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653000449] [2021-07-09 17:41:14,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 805 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 805 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:14,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:41:14,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:14,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:41:14,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:14,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:14,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:14,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:14,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:14,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:14,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:14,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:15,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:15,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:15,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:15,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:15,009 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:15,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:15,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:15,015 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:15,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:15,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:15,032 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-07-09 17:41:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:15,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653000449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:15,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:15,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:15,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761032990] [2021-07-09 17:41:15,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:15,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:15,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:15,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:15,086 INFO L87 Difference]: Start difference. First operand 268 states and 586 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:15,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:15,729 INFO L93 Difference]: Finished difference Result 300 states and 644 transitions. [2021-07-09 17:41:15,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:41:15,729 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:15,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:15,729 INFO L225 Difference]: With dead ends: 300 [2021-07-09 17:41:15,729 INFO L226 Difference]: Without dead ends: 284 [2021-07-09 17:41:15,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 705.0ms TimeCoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:41:15,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-07-09 17:41:15,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 269. [2021-07-09 17:41:15,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.1940298507462686) internal successors, (588), 268 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:15,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 588 transitions. [2021-07-09 17:41:15,732 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 588 transitions. Word has length 20 [2021-07-09 17:41:15,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:15,732 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 588 transitions. [2021-07-09 17:41:15,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:15,732 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 588 transitions. [2021-07-09 17:41:15,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:15,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:15,732 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:15,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 805 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3828 [2021-07-09 17:41:15,933 INFO L430 AbstractCegarLoop]: === Iteration 811 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:15,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:15,933 INFO L82 PathProgramCache]: Analyzing trace with hash 997704694, now seen corresponding path program 805 times [2021-07-09 17:41:15,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:15,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603316317] [2021-07-09 17:41:15,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:16,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:16,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603316317] [2021-07-09 17:41:16,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603316317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:16,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877409115] [2021-07-09 17:41:16,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 806 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 806 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:16,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:16,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:16,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:16,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:16,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:16,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:16,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:16,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:16,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:16,352 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:41:16,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:16,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:16,355 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:16,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:16,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:41:16,362 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:41:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:16,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877409115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:16,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:16,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:16,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105292624] [2021-07-09 17:41:16,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:16,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:16,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:16,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:16,404 INFO L87 Difference]: Start difference. First operand 269 states and 588 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:16,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:16,945 INFO L93 Difference]: Finished difference Result 299 states and 642 transitions. [2021-07-09 17:41:16,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:41:16,945 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:16,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:16,946 INFO L225 Difference]: With dead ends: 299 [2021-07-09 17:41:16,946 INFO L226 Difference]: Without dead ends: 286 [2021-07-09 17:41:16,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 616.8ms TimeCoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:41:16,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-07-09 17:41:16,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 270. [2021-07-09 17:41:16,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.193308550185874) internal successors, (590), 269 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:16,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 590 transitions. [2021-07-09 17:41:16,948 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 590 transitions. Word has length 20 [2021-07-09 17:41:16,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:16,948 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 590 transitions. [2021-07-09 17:41:16,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:16,948 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 590 transitions. [2021-07-09 17:41:16,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:16,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:16,949 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:17,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3831,806 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:17,149 INFO L430 AbstractCegarLoop]: === Iteration 812 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:17,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:17,149 INFO L82 PathProgramCache]: Analyzing trace with hash 2133889966, now seen corresponding path program 806 times [2021-07-09 17:41:17,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:17,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907852066] [2021-07-09 17:41:17,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:17,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:17,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:17,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907852066] [2021-07-09 17:41:17,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907852066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:17,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638596854] [2021-07-09 17:41:17,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 807 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 807 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:17,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:17,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:17,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:17,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:17,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:17,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:17,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:17,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:17,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:17,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:17,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:17,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:17,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:17,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:17,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:17,616 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:17,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:17,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:17,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:17,669 INFO L628 ElimStorePlain]: treesize reduction 83, result has 44.7 percent of original size [2021-07-09 17:41:17,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:17,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:17,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:17,673 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:17,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:17,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:17,676 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:17,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:17,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:17,698 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:17,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638596854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:17,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:17,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:17,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338192730] [2021-07-09 17:41:17,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:17,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:17,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:17,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:17,778 INFO L87 Difference]: Start difference. First operand 270 states and 590 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:18,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:18,335 INFO L93 Difference]: Finished difference Result 299 states and 640 transitions. [2021-07-09 17:41:18,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:41:18,336 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:18,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:18,336 INFO L225 Difference]: With dead ends: 299 [2021-07-09 17:41:18,336 INFO L226 Difference]: Without dead ends: 287 [2021-07-09 17:41:18,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 717.6ms TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:41:18,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-07-09 17:41:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 268. [2021-07-09 17:41:18,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.194756554307116) internal successors, (586), 267 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 586 transitions. [2021-07-09 17:41:18,339 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 586 transitions. Word has length 20 [2021-07-09 17:41:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:18,339 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 586 transitions. [2021-07-09 17:41:18,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:18,339 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 586 transitions. [2021-07-09 17:41:18,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:18,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:18,339 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:18,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 807 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3832 [2021-07-09 17:41:18,545 INFO L430 AbstractCegarLoop]: === Iteration 813 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:18,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:18,545 INFO L82 PathProgramCache]: Analyzing trace with hash -750098650, now seen corresponding path program 807 times [2021-07-09 17:41:18,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:18,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85867567] [2021-07-09 17:41:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:18,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:18,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85867567] [2021-07-09 17:41:18,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85867567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:18,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453905289] [2021-07-09 17:41:18,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 808 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 808 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:18,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:41:18,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:18,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:18,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:18,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:18,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:18,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:18,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:18,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:18,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:18,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:18,927 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:41:18,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:18,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:18,930 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:18,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:18,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:41:18,937 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:41:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:18,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453905289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:18,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:18,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:18,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475864797] [2021-07-09 17:41:18,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:18,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:18,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:18,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:18,980 INFO L87 Difference]: Start difference. First operand 268 states and 586 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:19,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:19,312 INFO L93 Difference]: Finished difference Result 297 states and 634 transitions. [2021-07-09 17:41:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:41:19,312 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:19,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:19,312 INFO L225 Difference]: With dead ends: 297 [2021-07-09 17:41:19,312 INFO L226 Difference]: Without dead ends: 281 [2021-07-09 17:41:19,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 447.0ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:41:19,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-07-09 17:41:19,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 270. [2021-07-09 17:41:19,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.193308550185874) internal successors, (590), 269 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:19,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 590 transitions. [2021-07-09 17:41:19,315 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 590 transitions. Word has length 20 [2021-07-09 17:41:19,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:19,315 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 590 transitions. [2021-07-09 17:41:19,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 590 transitions. [2021-07-09 17:41:19,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:19,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:19,315 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:19,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 808 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3835 [2021-07-09 17:41:19,516 INFO L430 AbstractCegarLoop]: === Iteration 814 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:19,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:19,516 INFO L82 PathProgramCache]: Analyzing trace with hash 111906414, now seen corresponding path program 808 times [2021-07-09 17:41:19,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:19,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717762507] [2021-07-09 17:41:19,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:19,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:19,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717762507] [2021-07-09 17:41:19,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717762507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:19,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156587627] [2021-07-09 17:41:19,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 809 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 809 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:19,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:19,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:19,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:19,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:19,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:19,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:19,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:19,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:19,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:19,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:19,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:19,920 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-07-09 17:41:19,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:19,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:41:19,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:19,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:19,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:41:19,929 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:41:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:19,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156587627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:19,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:19,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:41:19,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160291543] [2021-07-09 17:41:19,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:41:19,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:19,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:41:19,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:41:19,967 INFO L87 Difference]: Start difference. First operand 270 states and 590 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:20,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:20,395 INFO L93 Difference]: Finished difference Result 302 states and 649 transitions. [2021-07-09 17:41:20,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:41:20,395 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:20,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:20,396 INFO L225 Difference]: With dead ends: 302 [2021-07-09 17:41:20,396 INFO L226 Difference]: Without dead ends: 289 [2021-07-09 17:41:20,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 545.5ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:41:20,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-07-09 17:41:20,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 271. [2021-07-09 17:41:20,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.1925925925925926) internal successors, (592), 270 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:20,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 592 transitions. [2021-07-09 17:41:20,398 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 592 transitions. Word has length 20 [2021-07-09 17:41:20,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:20,398 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 592 transitions. [2021-07-09 17:41:20,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:20,398 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 592 transitions. [2021-07-09 17:41:20,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:20,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:20,399 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:20,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3836,809 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:20,599 INFO L430 AbstractCegarLoop]: === Iteration 815 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:20,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:20,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1248091686, now seen corresponding path program 809 times [2021-07-09 17:41:20,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:20,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699215958] [2021-07-09 17:41:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:20,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:20,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699215958] [2021-07-09 17:41:20,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699215958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:20,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682065254] [2021-07-09 17:41:20,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 810 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 810 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:20,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:41:20,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:20,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:20,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:20,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:20,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:20,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:20,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:20,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:20,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:20,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:20,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:20,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:20,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:20,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:20,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:20,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:20,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:20,925 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:20,976 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-07-09 17:41:20,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:20,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:20,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:20,980 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:20,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:20,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:20,983 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:21,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:21,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:21,005 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:21,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682065254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:21,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:21,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:41:21,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613220271] [2021-07-09 17:41:21,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:41:21,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:21,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:41:21,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:41:21,079 INFO L87 Difference]: Start difference. First operand 271 states and 592 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:21,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:21,520 INFO L93 Difference]: Finished difference Result 331 states and 693 transitions. [2021-07-09 17:41:21,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:41:21,521 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:21,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:21,521 INFO L225 Difference]: With dead ends: 331 [2021-07-09 17:41:21,521 INFO L226 Difference]: Without dead ends: 309 [2021-07-09 17:41:21,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 504.2ms TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:41:21,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-07-09 17:41:21,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 268. [2021-07-09 17:41:21,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.194756554307116) internal successors, (586), 267 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:21,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 586 transitions. [2021-07-09 17:41:21,523 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 586 transitions. Word has length 20 [2021-07-09 17:41:21,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:21,524 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 586 transitions. [2021-07-09 17:41:21,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:21,524 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 586 transitions. [2021-07-09 17:41:21,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:21,524 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:21,524 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:21,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3837,810 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:21,724 INFO L430 AbstractCegarLoop]: === Iteration 816 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:21,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:21,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1994877706, now seen corresponding path program 810 times [2021-07-09 17:41:21,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:21,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190644028] [2021-07-09 17:41:21,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:21,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:21,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190644028] [2021-07-09 17:41:21,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190644028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:21,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337114542] [2021-07-09 17:41:21,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 811 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 811 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:21,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:41:21,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:21,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:21,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:22,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:22,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:22,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:22,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:22,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:22,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:22,110 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:22,133 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:41:22,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:22,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:22,136 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:22,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:22,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:41:22,143 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:41:22,184 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:22,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337114542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:22,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:22,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:22,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667791129] [2021-07-09 17:41:22,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:22,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:22,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:22,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:22,185 INFO L87 Difference]: Start difference. First operand 268 states and 586 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:22,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:22,601 INFO L93 Difference]: Finished difference Result 300 states and 644 transitions. [2021-07-09 17:41:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:41:22,602 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:22,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:22,602 INFO L225 Difference]: With dead ends: 300 [2021-07-09 17:41:22,602 INFO L226 Difference]: Without dead ends: 287 [2021-07-09 17:41:22,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 493.2ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:41:22,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-07-09 17:41:22,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 270. [2021-07-09 17:41:22,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.193308550185874) internal successors, (590), 269 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:22,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 590 transitions. [2021-07-09 17:41:22,605 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 590 transitions. Word has length 20 [2021-07-09 17:41:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:22,605 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 590 transitions. [2021-07-09 17:41:22,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 590 transitions. [2021-07-09 17:41:22,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:22,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:22,605 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:22,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3840,811 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:22,806 INFO L430 AbstractCegarLoop]: === Iteration 817 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:22,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:22,806 INFO L82 PathProgramCache]: Analyzing trace with hash -858692434, now seen corresponding path program 811 times [2021-07-09 17:41:22,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:22,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693675869] [2021-07-09 17:41:22,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:23,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:23,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693675869] [2021-07-09 17:41:23,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693675869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:23,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632676819] [2021-07-09 17:41:23,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 812 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 812 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:23,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:23,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:23,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:23,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:23,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:23,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:23,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:23,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:23,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:23,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:23,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:23,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:23,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:23,166 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:23,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:23,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:23,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:23,223 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-07-09 17:41:23,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:23,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:23,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:23,227 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:23,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:23,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:23,230 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:23,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:23,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:23,252 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:23,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632676819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:23,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:23,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:23,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694273605] [2021-07-09 17:41:23,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:23,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:23,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:23,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:23,330 INFO L87 Difference]: Start difference. First operand 270 states and 590 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:23,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:23,875 INFO L93 Difference]: Finished difference Result 326 states and 686 transitions. [2021-07-09 17:41:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:41:23,875 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:23,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:23,876 INFO L225 Difference]: With dead ends: 326 [2021-07-09 17:41:23,876 INFO L226 Difference]: Without dead ends: 307 [2021-07-09 17:41:23,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 632.1ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:41:23,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-07-09 17:41:23,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 269. [2021-07-09 17:41:23,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.1940298507462686) internal successors, (588), 268 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:23,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 588 transitions. [2021-07-09 17:41:23,878 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 588 transitions. Word has length 20 [2021-07-09 17:41:23,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:23,878 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 588 transitions. [2021-07-09 17:41:23,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:23,878 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 588 transitions. [2021-07-09 17:41:23,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:23,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:23,879 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:24,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 812 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3841 [2021-07-09 17:41:24,079 INFO L430 AbstractCegarLoop]: === Iteration 818 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:24,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:24,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1290104102, now seen corresponding path program 812 times [2021-07-09 17:41:24,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:24,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115564706] [2021-07-09 17:41:24,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:24,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:24,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115564706] [2021-07-09 17:41:24,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115564706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:24,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655615438] [2021-07-09 17:41:24,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 813 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 813 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:24,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:24,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:24,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:24,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:24,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:24,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:24,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:24,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:24,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:24,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:24,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:24,499 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:41:24,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:24,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:24,503 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:24,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:24,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:24,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:24,528 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:24,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:24,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:24,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:24,552 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:24,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:24,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:24,572 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:24,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655615438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:24,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:24,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:24,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099704618] [2021-07-09 17:41:24,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:24,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:24,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:24,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:24,651 INFO L87 Difference]: Start difference. First operand 269 states and 588 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:25,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:25,139 INFO L93 Difference]: Finished difference Result 343 states and 724 transitions. [2021-07-09 17:41:25,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:41:25,139 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:25,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:25,140 INFO L225 Difference]: With dead ends: 343 [2021-07-09 17:41:25,140 INFO L226 Difference]: Without dead ends: 324 [2021-07-09 17:41:25,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 601.3ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:41:25,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-07-09 17:41:25,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 267. [2021-07-09 17:41:25,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.1954887218045114) internal successors, (584), 266 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:25,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 584 transitions. [2021-07-09 17:41:25,142 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 584 transitions. Word has length 20 [2021-07-09 17:41:25,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:25,142 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 584 transitions. [2021-07-09 17:41:25,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:25,143 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 584 transitions. [2021-07-09 17:41:25,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:25,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:25,143 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:25,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3844,813 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:25,343 INFO L430 AbstractCegarLoop]: === Iteration 819 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:25,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:25,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1854925742, now seen corresponding path program 813 times [2021-07-09 17:41:25,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:25,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725689709] [2021-07-09 17:41:25,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:25,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:25,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725689709] [2021-07-09 17:41:25,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725689709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:25,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201922427] [2021-07-09 17:41:25,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 814 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 814 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:25,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:41:25,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:25,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:41:25,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:25,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:25,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:25,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:25,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:25,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:25,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:25,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:25,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:25,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:25,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:25,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:25,711 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:25,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:25,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:25,722 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:25,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:25,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:25,739 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-07-09 17:41:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:25,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201922427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:25,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:25,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:25,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845255326] [2021-07-09 17:41:25,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:25,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:25,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:25,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:25,792 INFO L87 Difference]: Start difference. First operand 267 states and 584 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:26,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:26,269 INFO L93 Difference]: Finished difference Result 313 states and 666 transitions. [2021-07-09 17:41:26,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:41:26,269 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:26,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:26,270 INFO L225 Difference]: With dead ends: 313 [2021-07-09 17:41:26,270 INFO L226 Difference]: Without dead ends: 288 [2021-07-09 17:41:26,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 517.9ms TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:41:26,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-07-09 17:41:26,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 269. [2021-07-09 17:41:26,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.1940298507462686) internal successors, (588), 268 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:26,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 588 transitions. [2021-07-09 17:41:26,272 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 588 transitions. Word has length 20 [2021-07-09 17:41:26,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:26,272 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 588 transitions. [2021-07-09 17:41:26,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:26,272 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 588 transitions. [2021-07-09 17:41:26,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:26,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:26,273 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:26,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 814 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3849 [2021-07-09 17:41:26,473 INFO L430 AbstractCegarLoop]: === Iteration 820 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:26,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:26,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1578036490, now seen corresponding path program 814 times [2021-07-09 17:41:26,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:26,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926157843] [2021-07-09 17:41:26,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:26,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:26,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926157843] [2021-07-09 17:41:26,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926157843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:26,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570778788] [2021-07-09 17:41:26,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 815 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 815 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:26,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:26,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:26,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:26,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:26,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:26,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:26,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:26,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:26,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:26,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:26,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:26,880 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-07-09 17:41:26,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:26,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:41:26,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:26,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:26,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:41:26,889 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:41:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:26,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570778788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:26,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:26,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:26,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636371388] [2021-07-09 17:41:26,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:26,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:26,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:26,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:26,927 INFO L87 Difference]: Start difference. First operand 269 states and 588 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:27,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:27,374 INFO L93 Difference]: Finished difference Result 297 states and 635 transitions. [2021-07-09 17:41:27,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:41:27,375 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:27,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:27,375 INFO L225 Difference]: With dead ends: 297 [2021-07-09 17:41:27,375 INFO L226 Difference]: Without dead ends: 284 [2021-07-09 17:41:27,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 586.7ms TimeCoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:41:27,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-07-09 17:41:27,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 270. [2021-07-09 17:41:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.193308550185874) internal successors, (590), 269 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 590 transitions. [2021-07-09 17:41:27,377 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 590 transitions. Word has length 20 [2021-07-09 17:41:27,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:27,377 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 590 transitions. [2021-07-09 17:41:27,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:27,377 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 590 transitions. [2021-07-09 17:41:27,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:27,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:27,378 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:27,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3852,815 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:27,578 INFO L430 AbstractCegarLoop]: === Iteration 821 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:27,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:27,578 INFO L82 PathProgramCache]: Analyzing trace with hash -441851218, now seen corresponding path program 815 times [2021-07-09 17:41:27,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:27,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214082969] [2021-07-09 17:41:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:27,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:27,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214082969] [2021-07-09 17:41:27,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214082969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:27,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580208274] [2021-07-09 17:41:27,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 816 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 816 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:27,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:41:27,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:27,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:27,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:27,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:27,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:27,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:27,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:27,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:27,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:27,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:27,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:27,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:27,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:27,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:27,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:27,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:27,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:27,958 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:28,009 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-07-09 17:41:28,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:28,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:28,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:28,013 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:28,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:28,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:28,016 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:28,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:28,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:28,042 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:28,119 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:28,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580208274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:28,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:28,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:28,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95808782] [2021-07-09 17:41:28,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:28,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:28,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:28,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:28,120 INFO L87 Difference]: Start difference. First operand 270 states and 590 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:28,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:28,831 INFO L93 Difference]: Finished difference Result 330 states and 691 transitions. [2021-07-09 17:41:28,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:41:28,831 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:28,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:28,831 INFO L225 Difference]: With dead ends: 330 [2021-07-09 17:41:28,831 INFO L226 Difference]: Without dead ends: 308 [2021-07-09 17:41:28,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 768.6ms TimeCoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:41:28,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-07-09 17:41:28,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 268. [2021-07-09 17:41:28,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.194756554307116) internal successors, (586), 267 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 586 transitions. [2021-07-09 17:41:28,834 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 586 transitions. Word has length 20 [2021-07-09 17:41:28,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:28,834 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 586 transitions. [2021-07-09 17:41:28,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:28,834 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 586 transitions. [2021-07-09 17:41:28,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:28,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:28,834 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:29,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3853,816 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:29,035 INFO L430 AbstractCegarLoop]: === Iteration 822 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:29,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:29,035 INFO L82 PathProgramCache]: Analyzing trace with hash 610146686, now seen corresponding path program 816 times [2021-07-09 17:41:29,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:29,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339668144] [2021-07-09 17:41:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:29,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:29,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339668144] [2021-07-09 17:41:29,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339668144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:29,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511591742] [2021-07-09 17:41:29,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 817 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 817 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:29,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:41:29,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:29,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:29,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:29,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:29,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:29,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:29,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:29,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:29,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:29,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:29,407 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-07-09 17:41:29,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:29,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:41:29,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:29,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:29,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:41:29,416 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:41:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:29,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511591742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:29,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:29,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:29,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847557975] [2021-07-09 17:41:29,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:29,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:29,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:29,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:29,454 INFO L87 Difference]: Start difference. First operand 268 states and 586 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:29,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:29,865 INFO L93 Difference]: Finished difference Result 296 states and 636 transitions. [2021-07-09 17:41:29,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:41:29,866 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:29,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:29,866 INFO L225 Difference]: With dead ends: 296 [2021-07-09 17:41:29,866 INFO L226 Difference]: Without dead ends: 283 [2021-07-09 17:41:29,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 482.0ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:41:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-07-09 17:41:29,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 270. [2021-07-09 17:41:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.193308550185874) internal successors, (590), 269 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:29,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 590 transitions. [2021-07-09 17:41:29,868 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 590 transitions. Word has length 20 [2021-07-09 17:41:29,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:29,868 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 590 transitions. [2021-07-09 17:41:29,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:29,869 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 590 transitions. [2021-07-09 17:41:29,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:29,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:29,869 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:30,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3856,817 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:30,069 INFO L430 AbstractCegarLoop]: === Iteration 823 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:30,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:30,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1746331958, now seen corresponding path program 817 times [2021-07-09 17:41:30,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:30,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54708126] [2021-07-09 17:41:30,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:30,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:30,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54708126] [2021-07-09 17:41:30,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54708126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:30,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212220298] [2021-07-09 17:41:30,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 818 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 818 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:30,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:30,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:30,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:30,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:30,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:30,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:30,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:30,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:30,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:30,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:30,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:30,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:30,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:30,439 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:30,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:30,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:30,442 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:30,496 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-07-09 17:41:30,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:30,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:30,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:30,500 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:30,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:30,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:30,503 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:30,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:30,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:30,526 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:30,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212220298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:30,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:30,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:30,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570357351] [2021-07-09 17:41:30,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:30,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:30,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:30,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:30,602 INFO L87 Difference]: Start difference. First operand 270 states and 590 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:31,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:31,134 INFO L93 Difference]: Finished difference Result 319 states and 672 transitions. [2021-07-09 17:41:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:41:31,134 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:31,135 INFO L225 Difference]: With dead ends: 319 [2021-07-09 17:41:31,135 INFO L226 Difference]: Without dead ends: 300 [2021-07-09 17:41:31,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 681.8ms TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:41:31,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-09 17:41:31,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 269. [2021-07-09 17:41:31,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.1940298507462686) internal successors, (588), 268 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:31,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 588 transitions. [2021-07-09 17:41:31,137 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 588 transitions. Word has length 20 [2021-07-09 17:41:31,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:31,137 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 588 transitions. [2021-07-09 17:41:31,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:31,137 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 588 transitions. [2021-07-09 17:41:31,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:31,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:31,138 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:31,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 818 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3857 [2021-07-09 17:41:31,338 INFO L430 AbstractCegarLoop]: === Iteration 824 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:31,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:31,338 INFO L82 PathProgramCache]: Analyzing trace with hash -399838802, now seen corresponding path program 818 times [2021-07-09 17:41:31,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:31,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152109824] [2021-07-09 17:41:31,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:31,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:31,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152109824] [2021-07-09 17:41:31,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152109824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:31,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908128898] [2021-07-09 17:41:31,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 819 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 819 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:31,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:31,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:31,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:31,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:31,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:31,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:31,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:31,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:31,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:31,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:31,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:31,780 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:41:31,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:31,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:31,784 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:31,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:31,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:31,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:31,810 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:31,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:31,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:31,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:31,833 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:31,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:31,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:31,854 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:31,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908128898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:31,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:31,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:31,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64160211] [2021-07-09 17:41:31,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:31,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:31,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:31,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:31,930 INFO L87 Difference]: Start difference. First operand 269 states and 588 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:32,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:32,422 INFO L93 Difference]: Finished difference Result 339 states and 716 transitions. [2021-07-09 17:41:32,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:41:32,422 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:32,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:32,423 INFO L225 Difference]: With dead ends: 339 [2021-07-09 17:41:32,423 INFO L226 Difference]: Without dead ends: 320 [2021-07-09 17:41:32,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 607.2ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:41:32,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-07-09 17:41:32,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 267. [2021-07-09 17:41:32,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.1954887218045114) internal successors, (584), 266 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:32,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 584 transitions. [2021-07-09 17:41:32,425 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 584 transitions. Word has length 20 [2021-07-09 17:41:32,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:32,425 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 584 transitions. [2021-07-09 17:41:32,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:32,425 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 584 transitions. [2021-07-09 17:41:32,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:32,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:32,426 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:32,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3860,819 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:32,626 INFO L430 AbstractCegarLoop]: === Iteration 825 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:32,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:32,626 INFO L82 PathProgramCache]: Analyzing trace with hash -275651594, now seen corresponding path program 819 times [2021-07-09 17:41:32,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:32,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035296966] [2021-07-09 17:41:32,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:32,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:32,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035296966] [2021-07-09 17:41:32,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035296966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:32,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804733804] [2021-07-09 17:41:32,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 820 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 820 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:32,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:41:32,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:32,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:41:32,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:32,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:32,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:32,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:32,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:32,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:32,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:32,943 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:32,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:32,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:32,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:32,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:32,963 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:32,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:32,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:32,966 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:32,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:32,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:32,983 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-07-09 17:41:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:33,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804733804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:33,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:33,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:33,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148990765] [2021-07-09 17:41:33,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:33,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:33,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:33,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:33,033 INFO L87 Difference]: Start difference. First operand 267 states and 584 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:33,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:33,456 INFO L93 Difference]: Finished difference Result 301 states and 646 transitions. [2021-07-09 17:41:33,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:41:33,456 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:33,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:33,456 INFO L225 Difference]: With dead ends: 301 [2021-07-09 17:41:33,456 INFO L226 Difference]: Without dead ends: 288 [2021-07-09 17:41:33,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 451.2ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:41:33,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-07-09 17:41:33,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 270. [2021-07-09 17:41:33,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.193308550185874) internal successors, (590), 269 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:33,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 590 transitions. [2021-07-09 17:41:33,459 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 590 transitions. Word has length 20 [2021-07-09 17:41:33,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:33,459 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 590 transitions. [2021-07-09 17:41:33,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:33,459 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 590 transitions. [2021-07-09 17:41:33,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:33,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:33,459 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:33,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3865,820 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:33,660 INFO L430 AbstractCegarLoop]: === Iteration 826 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:33,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:33,660 INFO L82 PathProgramCache]: Analyzing trace with hash 860533678, now seen corresponding path program 820 times [2021-07-09 17:41:33,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:33,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697021839] [2021-07-09 17:41:33,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:33,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:33,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697021839] [2021-07-09 17:41:33,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697021839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:33,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575422673] [2021-07-09 17:41:33,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 821 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 821 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:33,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:33,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:33,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:33,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:34,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:34,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:34,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:34,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:34,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:34,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:34,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:34,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:34,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:34,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:34,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:34,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:34,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:34,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:34,039 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:34,089 INFO L628 ElimStorePlain]: treesize reduction 83, result has 44.7 percent of original size [2021-07-09 17:41:34,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:34,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:34,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:34,093 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:34,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:34,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:34,096 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:34,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:34,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:34,118 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:34,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575422673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:34,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:34,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:34,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029353164] [2021-07-09 17:41:34,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:34,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:34,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:34,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:34,197 INFO L87 Difference]: Start difference. First operand 270 states and 590 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:34,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:34,715 INFO L93 Difference]: Finished difference Result 326 states and 686 transitions. [2021-07-09 17:41:34,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:41:34,716 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:34,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:34,716 INFO L225 Difference]: With dead ends: 326 [2021-07-09 17:41:34,716 INFO L226 Difference]: Without dead ends: 307 [2021-07-09 17:41:34,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 635.4ms TimeCoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:41:34,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-07-09 17:41:34,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 269. [2021-07-09 17:41:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.1940298507462686) internal successors, (588), 268 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:34,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 588 transitions. [2021-07-09 17:41:34,719 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 588 transitions. Word has length 20 [2021-07-09 17:41:34,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:34,719 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 588 transitions. [2021-07-09 17:41:34,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:34,719 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 588 transitions. [2021-07-09 17:41:34,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:34,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:34,719 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:34,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 821 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3868 [2021-07-09 17:41:34,920 INFO L430 AbstractCegarLoop]: === Iteration 827 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:34,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:34,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1285637082, now seen corresponding path program 821 times [2021-07-09 17:41:34,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:34,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834076992] [2021-07-09 17:41:34,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:35,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:35,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834076992] [2021-07-09 17:41:35,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834076992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:35,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981156687] [2021-07-09 17:41:35,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 822 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 822 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:35,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:41:35,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:35,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:35,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:35,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:35,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:35,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:35,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:35,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:35,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:35,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:35,355 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:41:35,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:35,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:35,359 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:35,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:35,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:35,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:35,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:35,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:35,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:35,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:35,408 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:35,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:35,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:35,428 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:35,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981156687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:35,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:35,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:35,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048193526] [2021-07-09 17:41:35,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:35,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:35,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:35,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:35,507 INFO L87 Difference]: Start difference. First operand 269 states and 588 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:36,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:36,144 INFO L93 Difference]: Finished difference Result 341 states and 719 transitions. [2021-07-09 17:41:36,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:41:36,145 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:36,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:36,145 INFO L225 Difference]: With dead ends: 341 [2021-07-09 17:41:36,145 INFO L226 Difference]: Without dead ends: 319 [2021-07-09 17:41:36,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 783.0ms TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:41:36,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-07-09 17:41:36,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 273. [2021-07-09 17:41:36,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:36,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-07-09 17:41:36,148 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-07-09 17:41:36,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:36,148 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-07-09 17:41:36,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:36,148 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-07-09 17:41:36,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:36,148 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:36,148 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:36,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3871,822 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:36,349 INFO L430 AbstractCegarLoop]: === Iteration 828 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:36,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:36,349 INFO L82 PathProgramCache]: Analyzing trace with hash 902546094, now seen corresponding path program 822 times [2021-07-09 17:41:36,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:36,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717831049] [2021-07-09 17:41:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:36,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:36,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717831049] [2021-07-09 17:41:36,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717831049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:36,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364135276] [2021-07-09 17:41:36,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 823 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 823 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:36,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:41:36,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:36,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:41:36,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:36,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:36,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:36,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:36,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:36,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:36,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:36,785 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:36,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:36,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:36,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:36,812 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:36,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:36,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:36,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:36,834 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:36,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:36,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:36,852 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:41:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:36,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364135276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:36,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:36,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:36,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687871110] [2021-07-09 17:41:36,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:36,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:36,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:36,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:36,941 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:37,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:37,498 INFO L93 Difference]: Finished difference Result 322 states and 686 transitions. [2021-07-09 17:41:37,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:41:37,498 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:37,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:37,498 INFO L225 Difference]: With dead ends: 322 [2021-07-09 17:41:37,498 INFO L226 Difference]: Without dead ends: 308 [2021-07-09 17:41:37,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 634.0ms TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:41:37,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-07-09 17:41:37,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 273. [2021-07-09 17:41:37,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:37,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-07-09 17:41:37,501 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-07-09 17:41:37,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:37,501 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-07-09 17:41:37,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:37,501 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-07-09 17:41:37,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:37,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:37,502 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:37,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3876,823 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:37,702 INFO L430 AbstractCegarLoop]: === Iteration 829 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:37,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:37,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1006303270, now seen corresponding path program 823 times [2021-07-09 17:41:37,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:37,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675348794] [2021-07-09 17:41:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:37,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:37,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675348794] [2021-07-09 17:41:37,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675348794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:37,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582502480] [2021-07-09 17:41:37,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 824 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 824 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:37,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:37,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:38,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:38,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:38,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:38,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:38,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:38,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:38,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:38,081 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-07-09 17:41:38,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:38,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:38,084 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:38,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:38,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:41:38,091 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:41:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:38,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582502480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:38,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:38,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:38,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849954414] [2021-07-09 17:41:38,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:38,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:38,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:38,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:38,130 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:38,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:38,513 INFO L93 Difference]: Finished difference Result 302 states and 645 transitions. [2021-07-09 17:41:38,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:41:38,513 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:38,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:38,513 INFO L225 Difference]: With dead ends: 302 [2021-07-09 17:41:38,513 INFO L226 Difference]: Without dead ends: 286 [2021-07-09 17:41:38,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 440.7ms TimeCoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:41:38,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-07-09 17:41:38,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 276. [2021-07-09 17:41:38,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.192727272727273) internal successors, (603), 275 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:38,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 603 transitions. [2021-07-09 17:41:38,515 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 603 transitions. Word has length 20 [2021-07-09 17:41:38,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:38,516 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 603 transitions. [2021-07-09 17:41:38,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:38,516 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 603 transitions. [2021-07-09 17:41:38,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:38,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:38,516 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:38,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3883,824 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:38,716 INFO L430 AbstractCegarLoop]: === Iteration 830 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:38,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:38,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1868308334, now seen corresponding path program 824 times [2021-07-09 17:41:38,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:38,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609663750] [2021-07-09 17:41:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:38,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:38,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:38,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609663750] [2021-07-09 17:41:38,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609663750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:38,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858037888] [2021-07-09 17:41:38,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 825 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 825 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:38,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:38,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:38,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:38,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:39,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:39,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:39,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:39,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:39,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:39,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:39,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:39,103 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:41:39,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:39,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:39,106 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:39,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:39,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:41:39,113 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:41:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:39,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858037888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:39,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:39,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:39,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862768950] [2021-07-09 17:41:39,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:39,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:39,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:39,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:39,153 INFO L87 Difference]: Start difference. First operand 276 states and 603 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:39,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:39,697 INFO L93 Difference]: Finished difference Result 310 states and 666 transitions. [2021-07-09 17:41:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:41:39,697 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:39,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:39,698 INFO L225 Difference]: With dead ends: 310 [2021-07-09 17:41:39,698 INFO L226 Difference]: Without dead ends: 297 [2021-07-09 17:41:39,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 576.9ms TimeCoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:41:39,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-07-09 17:41:39,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 277. [2021-07-09 17:41:39,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:39,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-07-09 17:41:39,700 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 20 [2021-07-09 17:41:39,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:39,700 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-07-09 17:41:39,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:39,700 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-07-09 17:41:39,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:39,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:39,701 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:39,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3884,825 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:39,901 INFO L430 AbstractCegarLoop]: === Iteration 831 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:39,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:39,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1290473690, now seen corresponding path program 825 times [2021-07-09 17:41:39,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:39,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105009730] [2021-07-09 17:41:39,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:40,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:40,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105009730] [2021-07-09 17:41:40,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105009730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:40,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149744099] [2021-07-09 17:41:40,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 826 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 826 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:40,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:41:40,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:40,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:41:40,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:40,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:40,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:40,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:40,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:40,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:40,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:40,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:40,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:40,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:40,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:40,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:40,230 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:40,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:40,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:40,233 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:40,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:40,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:40,254 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:41:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:40,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149744099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:40,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:40,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:41:40,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026642815] [2021-07-09 17:41:40,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:41:40,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:40,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:41:40,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:41:40,336 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:40,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:40,808 INFO L93 Difference]: Finished difference Result 312 states and 672 transitions. [2021-07-09 17:41:40,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:41:40,808 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:40,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:40,809 INFO L225 Difference]: With dead ends: 312 [2021-07-09 17:41:40,809 INFO L226 Difference]: Without dead ends: 305 [2021-07-09 17:41:40,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 500.9ms TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:41:40,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-07-09 17:41:40,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 275. [2021-07-09 17:41:40,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:40,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-07-09 17:41:40,811 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-07-09 17:41:40,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:40,811 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-07-09 17:41:40,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:40,812 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-07-09 17:41:40,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:40,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:40,812 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:41,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3885,826 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:41,012 INFO L430 AbstractCegarLoop]: === Iteration 832 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:41,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:41,012 INFO L82 PathProgramCache]: Analyzing trace with hash -238475786, now seen corresponding path program 826 times [2021-07-09 17:41:41,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:41,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39078533] [2021-07-09 17:41:41,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:41,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:41,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39078533] [2021-07-09 17:41:41,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39078533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:41,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664801866] [2021-07-09 17:41:41,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 827 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 827 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:41,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:41,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:41,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:41,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:41,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:41,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:41,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:41,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:41,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:41,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:41,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:41,414 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:41:41,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:41,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:41,417 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:41,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:41,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:41:41,424 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:41:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:41,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664801866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:41,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:41,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:41,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316783998] [2021-07-09 17:41:41,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:41,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:41,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:41,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:41,461 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:41,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:41,755 INFO L93 Difference]: Finished difference Result 300 states and 642 transitions. [2021-07-09 17:41:41,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:41:41,756 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:41,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:41,756 INFO L225 Difference]: With dead ends: 300 [2021-07-09 17:41:41,756 INFO L226 Difference]: Without dead ends: 287 [2021-07-09 17:41:41,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 468.5ms TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:41:41,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-07-09 17:41:41,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 277. [2021-07-09 17:41:41,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:41,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-07-09 17:41:41,758 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 20 [2021-07-09 17:41:41,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:41,759 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-07-09 17:41:41,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:41,759 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-07-09 17:41:41,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:41,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:41,759 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:41,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3890,827 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:41,959 INFO L430 AbstractCegarLoop]: === Iteration 833 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:41,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:41,959 INFO L82 PathProgramCache]: Analyzing trace with hash 897709486, now seen corresponding path program 827 times [2021-07-09 17:41:41,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:41,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895193046] [2021-07-09 17:41:41,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:42,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:42,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895193046] [2021-07-09 17:41:42,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895193046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:42,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551002330] [2021-07-09 17:41:42,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 828 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 828 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:42,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:41:42,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:42,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:42,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:42,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:42,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:42,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:42,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:42,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:42,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:42,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:42,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:42,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:42,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:42,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:42,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:42,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:42,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:42,308 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:42,359 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-07-09 17:41:42,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:42,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:42,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:42,363 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:42,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:42,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:42,367 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:42,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:42,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:42,389 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:42,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551002330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:42,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:42,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:41:42,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616772920] [2021-07-09 17:41:42,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:41:42,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:42,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:41:42,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:41:42,462 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:43,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:43,205 INFO L93 Difference]: Finished difference Result 365 states and 751 transitions. [2021-07-09 17:41:43,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:41:43,206 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:43,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:43,206 INFO L225 Difference]: With dead ends: 365 [2021-07-09 17:41:43,206 INFO L226 Difference]: Without dead ends: 336 [2021-07-09 17:41:43,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 784.5ms TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:41:43,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-07-09 17:41:43,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 282. [2021-07-09 17:41:43,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.188612099644128) internal successors, (615), 281 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:43,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 615 transitions. [2021-07-09 17:41:43,209 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 615 transitions. Word has length 20 [2021-07-09 17:41:43,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:43,209 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 615 transitions. [2021-07-09 17:41:43,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:43,209 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 615 transitions. [2021-07-09 17:41:43,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:43,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:43,209 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:43,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 828 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3891 [2021-07-09 17:41:43,410 INFO L430 AbstractCegarLoop]: === Iteration 834 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:43,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:43,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1248461274, now seen corresponding path program 828 times [2021-07-09 17:41:43,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:43,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240362108] [2021-07-09 17:41:43,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:43,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:43,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240362108] [2021-07-09 17:41:43,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240362108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:43,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262550362] [2021-07-09 17:41:43,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 829 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 829 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:43,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:41:43,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:43,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:41:43,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:43,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:43,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:43,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:43,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:43,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:43,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:43,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:43,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:43,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:43,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:43,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:43,743 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:43,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:43,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:43,746 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:43,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:43,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:43,766 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:41:43,838 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:43,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262550362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:43,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:43,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:43,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871998553] [2021-07-09 17:41:43,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:43,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:43,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:43,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:43,839 INFO L87 Difference]: Start difference. First operand 282 states and 615 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:44,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:44,198 INFO L93 Difference]: Finished difference Result 316 states and 680 transitions. [2021-07-09 17:41:44,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:41:44,198 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:44,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:44,198 INFO L225 Difference]: With dead ends: 316 [2021-07-09 17:41:44,198 INFO L226 Difference]: Without dead ends: 309 [2021-07-09 17:41:44,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 461.6ms TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:41:44,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-07-09 17:41:44,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 282. [2021-07-09 17:41:44,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.188612099644128) internal successors, (615), 281 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:44,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 615 transitions. [2021-07-09 17:41:44,201 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 615 transitions. Word has length 20 [2021-07-09 17:41:44,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:44,201 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 615 transitions. [2021-07-09 17:41:44,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:44,201 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 615 transitions. [2021-07-09 17:41:44,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:44,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:44,201 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:44,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3894,829 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:44,402 INFO L430 AbstractCegarLoop]: === Iteration 835 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:44,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:44,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1124274066, now seen corresponding path program 829 times [2021-07-09 17:41:44,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:44,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012846553] [2021-07-09 17:41:44,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:44,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:44,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012846553] [2021-07-09 17:41:44,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012846553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:44,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326101272] [2021-07-09 17:41:44,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 830 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 830 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:44,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:44,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:44,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:44,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:44,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:44,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:44,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:44,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:44,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:44,767 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:41:44,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:44,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:44,769 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:44,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:44,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:41:44,776 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:41:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:44,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326101272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:44,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:44,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:41:44,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544817772] [2021-07-09 17:41:44,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:41:44,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:44,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:41:44,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:41:44,810 INFO L87 Difference]: Start difference. First operand 282 states and 615 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:45,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:45,140 INFO L93 Difference]: Finished difference Result 309 states and 663 transitions. [2021-07-09 17:41:45,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:41:45,140 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:45,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:45,140 INFO L225 Difference]: With dead ends: 309 [2021-07-09 17:41:45,140 INFO L226 Difference]: Without dead ends: 296 [2021-07-09 17:41:45,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 417.8ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:41:45,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-07-09 17:41:45,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 285. [2021-07-09 17:41:45,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.186619718309859) internal successors, (621), 284 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:45,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 621 transitions. [2021-07-09 17:41:45,143 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 621 transitions. Word has length 20 [2021-07-09 17:41:45,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:45,143 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 621 transitions. [2021-07-09 17:41:45,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:45,143 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 621 transitions. [2021-07-09 17:41:45,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:45,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:45,143 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:45,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3897,830 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:45,344 INFO L430 AbstractCegarLoop]: === Iteration 836 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:45,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:45,344 INFO L82 PathProgramCache]: Analyzing trace with hash 11911206, now seen corresponding path program 830 times [2021-07-09 17:41:45,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:45,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218380736] [2021-07-09 17:41:45,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:45,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:45,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:45,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218380736] [2021-07-09 17:41:45,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218380736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:45,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116213483] [2021-07-09 17:41:45,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 831 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 831 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:45,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:45,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:45,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:45,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:45,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:45,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:45,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:45,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:45,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:45,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:45,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:45,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:45,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:45,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:45,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:45,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:45,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:45,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:45,688 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:45,739 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-07-09 17:41:45,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:45,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:45,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:45,743 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:45,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:45,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:45,746 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:45,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:45,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:45,768 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:45,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116213483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:45,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:45,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:45,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302200923] [2021-07-09 17:41:45,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:45,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:45,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:45,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:45,843 INFO L87 Difference]: Start difference. First operand 285 states and 621 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:46,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:46,345 INFO L93 Difference]: Finished difference Result 332 states and 699 transitions. [2021-07-09 17:41:46,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:41:46,345 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:46,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:46,346 INFO L225 Difference]: With dead ends: 332 [2021-07-09 17:41:46,346 INFO L226 Difference]: Without dead ends: 313 [2021-07-09 17:41:46,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 582.1ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:41:46,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-07-09 17:41:46,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 284. [2021-07-09 17:41:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.187279151943463) internal successors, (619), 283 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:46,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 619 transitions. [2021-07-09 17:41:46,348 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 619 transitions. Word has length 20 [2021-07-09 17:41:46,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:46,348 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 619 transitions. [2021-07-09 17:41:46,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:46,349 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 619 transitions. [2021-07-09 17:41:46,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:46,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:46,349 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:46,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 831 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3898 [2021-07-09 17:41:46,549 INFO L430 AbstractCegarLoop]: === Iteration 837 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:46,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:46,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2134259554, now seen corresponding path program 831 times [2021-07-09 17:41:46,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:46,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130207872] [2021-07-09 17:41:46,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:46,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:46,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130207872] [2021-07-09 17:41:46,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130207872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:46,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540390773] [2021-07-09 17:41:46,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 832 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 832 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:46,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:41:46,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:46,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:46,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:46,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:46,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:46,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:46,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:46,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:46,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:46,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:46,958 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:41:46,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:46,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:46,962 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:46,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:46,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:46,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:46,987 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:47,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:47,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:47,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:47,011 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:47,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:47,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:47,031 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:47,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540390773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:47,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:47,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:47,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895397268] [2021-07-09 17:41:47,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:47,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:47,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:47,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:47,107 INFO L87 Difference]: Start difference. First operand 284 states and 619 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:47,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:47,698 INFO L93 Difference]: Finished difference Result 344 states and 723 transitions. [2021-07-09 17:41:47,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:41:47,698 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:47,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:47,699 INFO L225 Difference]: With dead ends: 344 [2021-07-09 17:41:47,699 INFO L226 Difference]: Without dead ends: 322 [2021-07-09 17:41:47,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 703.7ms TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:41:47,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-07-09 17:41:47,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 281. [2021-07-09 17:41:47,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1892857142857145) internal successors, (613), 280 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 613 transitions. [2021-07-09 17:41:47,702 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 613 transitions. Word has length 20 [2021-07-09 17:41:47,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:47,702 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 613 transitions. [2021-07-09 17:41:47,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:47,702 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 613 transitions. [2021-07-09 17:41:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:47,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:47,702 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:47,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3901,832 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:47,903 INFO L430 AbstractCegarLoop]: === Iteration 838 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:47,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:47,903 INFO L82 PathProgramCache]: Analyzing trace with hash 53923622, now seen corresponding path program 832 times [2021-07-09 17:41:47,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:47,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455116341] [2021-07-09 17:41:47,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:48,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:48,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455116341] [2021-07-09 17:41:48,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455116341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:48,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400763535] [2021-07-09 17:41:48,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 833 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 833 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:48,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:48,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:48,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:48,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:48,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:48,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:48,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:48,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:48,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:48,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:48,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:48,355 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:41:48,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:48,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:48,359 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:48,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:48,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:48,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:48,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:48,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:48,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:48,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:48,422 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:48,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:48,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:48,443 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:48,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400763535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:48,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:48,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:48,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183391486] [2021-07-09 17:41:48,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:48,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:48,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:48,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:48,532 INFO L87 Difference]: Start difference. First operand 281 states and 613 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:49,145 INFO L93 Difference]: Finished difference Result 355 states and 749 transitions. [2021-07-09 17:41:49,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:41:49,145 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:49,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:49,146 INFO L225 Difference]: With dead ends: 355 [2021-07-09 17:41:49,146 INFO L226 Difference]: Without dead ends: 336 [2021-07-09 17:41:49,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 706.1ms TimeCoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:41:49,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-07-09 17:41:49,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 280. [2021-07-09 17:41:49,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.1899641577060933) internal successors, (611), 279 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:49,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 611 transitions. [2021-07-09 17:41:49,148 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 611 transitions. Word has length 20 [2021-07-09 17:41:49,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:49,148 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 611 transitions. [2021-07-09 17:41:49,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:49,148 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 611 transitions. [2021-07-09 17:41:49,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:49,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:49,149 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:49,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3906,833 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:49,349 INFO L430 AbstractCegarLoop]: === Iteration 839 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:49,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:49,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1480750326, now seen corresponding path program 833 times [2021-07-09 17:41:49,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:49,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598394665] [2021-07-09 17:41:49,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:49,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:49,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598394665] [2021-07-09 17:41:49,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598394665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:49,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830424295] [2021-07-09 17:41:49,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 834 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 834 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:49,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:41:49,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:49,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:49,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:49,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:49,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:49,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:49,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:49,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:49,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:49,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:49,723 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-07-09 17:41:49,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:49,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:41:49,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:49,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:49,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:41:49,732 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:41:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:49,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830424295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:49,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:49,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:41:49,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710960918] [2021-07-09 17:41:49,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:41:49,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:49,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:41:49,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:41:49,767 INFO L87 Difference]: Start difference. First operand 280 states and 611 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:50,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:50,125 INFO L93 Difference]: Finished difference Result 319 states and 680 transitions. [2021-07-09 17:41:50,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:41:50,125 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:50,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:50,126 INFO L225 Difference]: With dead ends: 319 [2021-07-09 17:41:50,126 INFO L226 Difference]: Without dead ends: 300 [2021-07-09 17:41:50,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 429.2ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:41:50,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-09 17:41:50,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 282. [2021-07-09 17:41:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.188612099644128) internal successors, (615), 281 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 615 transitions. [2021-07-09 17:41:50,128 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 615 transitions. Word has length 20 [2021-07-09 17:41:50,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:50,128 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 615 transitions. [2021-07-09 17:41:50,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:50,128 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 615 transitions. [2021-07-09 17:41:50,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:50,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:50,129 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:50,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3911,834 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:50,329 INFO L430 AbstractCegarLoop]: === Iteration 840 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:50,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:50,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1678031698, now seen corresponding path program 834 times [2021-07-09 17:41:50,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:50,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573615578] [2021-07-09 17:41:50,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:50,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:50,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573615578] [2021-07-09 17:41:50,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573615578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:50,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158708711] [2021-07-09 17:41:50,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 835 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 835 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:50,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:41:50,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:50,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:41:50,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:50,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:50,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:50,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:50,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:50,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:50,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:50,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:50,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:50,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:50,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:50,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:50,647 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:50,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:50,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:50,650 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:50,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:50,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:50,670 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:41:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:50,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158708711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:50,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:50,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:41:50,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600383991] [2021-07-09 17:41:50,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:41:50,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:50,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:41:50,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:41:50,757 INFO L87 Difference]: Start difference. First operand 282 states and 615 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:51,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:51,065 INFO L93 Difference]: Finished difference Result 315 states and 678 transitions. [2021-07-09 17:41:51,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:41:51,066 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:51,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:51,066 INFO L225 Difference]: With dead ends: 315 [2021-07-09 17:41:51,066 INFO L226 Difference]: Without dead ends: 308 [2021-07-09 17:41:51,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 403.0ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:41:51,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-07-09 17:41:51,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 281. [2021-07-09 17:41:51,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1892857142857145) internal successors, (613), 280 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:51,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 613 transitions. [2021-07-09 17:41:51,069 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 613 transitions. Word has length 20 [2021-07-09 17:41:51,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:51,069 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 613 transitions. [2021-07-09 17:41:51,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:51,069 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 613 transitions. [2021-07-09 17:41:51,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:51,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:51,069 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:51,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3912,835 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:51,270 INFO L430 AbstractCegarLoop]: === Iteration 841 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:51,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:51,270 INFO L82 PathProgramCache]: Analyzing trace with hash 694696306, now seen corresponding path program 835 times [2021-07-09 17:41:51,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:51,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366619965] [2021-07-09 17:41:51,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:51,340 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:51,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:51,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366619965] [2021-07-09 17:41:51,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366619965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:51,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773306274] [2021-07-09 17:41:51,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 836 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 836 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:51,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:41:51,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:51,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773306274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:51,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:51,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:41:51,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930429427] [2021-07-09 17:41:51,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:41:51,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:51,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:41:51,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:41:51,512 INFO L87 Difference]: Start difference. First operand 281 states and 613 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:51,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:51,966 INFO L93 Difference]: Finished difference Result 364 states and 785 transitions. [2021-07-09 17:41:51,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:41:51,967 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:51,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:51,967 INFO L225 Difference]: With dead ends: 364 [2021-07-09 17:41:51,967 INFO L226 Difference]: Without dead ends: 364 [2021-07-09 17:41:51,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 446.3ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:41:51,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-07-09 17:41:51,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 281. [2021-07-09 17:41:51,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1892857142857145) internal successors, (613), 280 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:51,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 613 transitions. [2021-07-09 17:41:51,970 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 613 transitions. Word has length 20 [2021-07-09 17:41:51,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:51,970 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 613 transitions. [2021-07-09 17:41:51,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:51,970 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 613 transitions. [2021-07-09 17:41:51,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:51,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:51,970 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:52,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 836 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3917 [2021-07-09 17:41:52,181 INFO L430 AbstractCegarLoop]: === Iteration 842 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:52,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:52,181 INFO L82 PathProgramCache]: Analyzing trace with hash 470764838, now seen corresponding path program 836 times [2021-07-09 17:41:52,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:52,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643150011] [2021-07-09 17:41:52,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:52,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:52,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643150011] [2021-07-09 17:41:52,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643150011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:52,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500293235] [2021-07-09 17:41:52,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 837 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 837 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:52,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:52,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:52,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:52,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:52,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:52,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:52,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:52,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:52,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:52,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:52,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:52,630 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-07-09 17:41:52,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:52,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:52,634 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:52,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:52,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:52,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:52,658 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:52,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:52,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:52,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:52,684 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:52,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:52,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:52,714 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:52,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500293235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:52,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:52,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:52,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122629218] [2021-07-09 17:41:52,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:52,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:52,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:52,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:52,795 INFO L87 Difference]: Start difference. First operand 281 states and 613 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:53,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:53,407 INFO L93 Difference]: Finished difference Result 350 states and 739 transitions. [2021-07-09 17:41:53,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:41:53,407 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:53,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:53,407 INFO L225 Difference]: With dead ends: 350 [2021-07-09 17:41:53,407 INFO L226 Difference]: Without dead ends: 331 [2021-07-09 17:41:53,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 712.1ms TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:41:53,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-07-09 17:41:53,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 280. [2021-07-09 17:41:53,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.1899641577060933) internal successors, (611), 279 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 611 transitions. [2021-07-09 17:41:53,410 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 611 transitions. Word has length 20 [2021-07-09 17:41:53,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:53,410 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 611 transitions. [2021-07-09 17:41:53,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:53,410 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 611 transitions. [2021-07-09 17:41:53,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:53,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:53,411 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:53,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 837 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3927 [2021-07-09 17:41:53,611 INFO L430 AbstractCegarLoop]: === Iteration 843 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:53,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:53,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1636019282, now seen corresponding path program 837 times [2021-07-09 17:41:53,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:53,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344374090] [2021-07-09 17:41:53,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:53,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:53,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344374090] [2021-07-09 17:41:53,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344374090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:53,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662864205] [2021-07-09 17:41:53,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 838 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 838 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:53,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:41:53,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:53,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:53,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:54,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:54,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:54,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:54,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:54,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:54,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:54,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:54,093 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-07-09 17:41:54,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:54,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:54,097 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:54,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:54,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:54,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:54,123 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:54,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:54,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:54,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:54,147 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:54,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:54,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:54,168 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:54,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662864205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:54,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:54,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:54,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317046867] [2021-07-09 17:41:54,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:54,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:54,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:54,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:54,249 INFO L87 Difference]: Start difference. First operand 280 states and 611 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:55,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:55,181 INFO L93 Difference]: Finished difference Result 396 states and 812 transitions. [2021-07-09 17:41:55,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:41:55,181 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:55,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:55,181 INFO L225 Difference]: With dead ends: 396 [2021-07-09 17:41:55,181 INFO L226 Difference]: Without dead ends: 358 [2021-07-09 17:41:55,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1025.3ms TimeCoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:41:55,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-07-09 17:41:55,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 279. [2021-07-09 17:41:55,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.1906474820143886) internal successors, (609), 278 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:55,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 609 transitions. [2021-07-09 17:41:55,184 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 609 transitions. Word has length 20 [2021-07-09 17:41:55,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:55,184 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 609 transitions. [2021-07-09 17:41:55,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:55,185 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 609 transitions. [2021-07-09 17:41:55,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:55,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:55,185 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:55,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 838 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3932 [2021-07-09 17:41:55,385 INFO L430 AbstractCegarLoop]: === Iteration 844 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:55,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:55,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1773149734, now seen corresponding path program 838 times [2021-07-09 17:41:55,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:55,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750474593] [2021-07-09 17:41:55,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:55,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:55,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750474593] [2021-07-09 17:41:55,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750474593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:55,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250897152] [2021-07-09 17:41:55,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 839 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 839 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:55,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:55,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:55,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:55,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:55,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:55,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:55,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:55,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:55,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:55,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:55,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:55,904 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:41:55,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:55,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:55,907 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:55,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:55,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:55,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:55,932 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:55,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:55,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:55,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:55,956 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:55,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:55,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:55,976 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:56,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250897152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:56,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:56,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:56,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747496787] [2021-07-09 17:41:56,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:56,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:56,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:56,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:56,058 INFO L87 Difference]: Start difference. First operand 279 states and 609 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:56,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:56,701 INFO L93 Difference]: Finished difference Result 360 states and 759 transitions. [2021-07-09 17:41:56,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:41:56,701 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:56,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:56,702 INFO L225 Difference]: With dead ends: 360 [2021-07-09 17:41:56,702 INFO L226 Difference]: Without dead ends: 341 [2021-07-09 17:41:56,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 755.1ms TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:41:56,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-07-09 17:41:56,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 278. [2021-07-09 17:41:56,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.191335740072202) internal successors, (607), 277 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:56,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 607 transitions. [2021-07-09 17:41:56,705 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 607 transitions. Word has length 20 [2021-07-09 17:41:56,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:56,705 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 607 transitions. [2021-07-09 17:41:56,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:56,705 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 607 transitions. [2021-07-09 17:41:56,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:56,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:56,705 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:56,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3937,839 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:56,906 INFO L430 AbstractCegarLoop]: === Iteration 845 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:56,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:56,906 INFO L82 PathProgramCache]: Analyzing trace with hash 468810414, now seen corresponding path program 839 times [2021-07-09 17:41:56,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:56,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185545559] [2021-07-09 17:41:56,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:57,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:57,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185545559] [2021-07-09 17:41:57,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185545559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:57,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851307663] [2021-07-09 17:41:57,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 840 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 840 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:57,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:41:57,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:57,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:57,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:57,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:57,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:57,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:57,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:57,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:57,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:41:57,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:57,293 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:41:57,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:57,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:57,295 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:57,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:57,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:41:57,302 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:41:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:57,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851307663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:57,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:57,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:41:57,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536189663] [2021-07-09 17:41:57,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:41:57,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:57,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:41:57,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:41:57,339 INFO L87 Difference]: Start difference. First operand 278 states and 607 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:57,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:57,760 INFO L93 Difference]: Finished difference Result 317 states and 669 transitions. [2021-07-09 17:41:57,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:41:57,760 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:57,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:57,760 INFO L225 Difference]: With dead ends: 317 [2021-07-09 17:41:57,761 INFO L226 Difference]: Without dead ends: 292 [2021-07-09 17:41:57,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 460.5ms TimeCoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:41:57,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-07-09 17:41:57,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 282. [2021-07-09 17:41:57,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.185053380782918) internal successors, (614), 281 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:57,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 614 transitions. [2021-07-09 17:41:57,763 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 614 transitions. Word has length 20 [2021-07-09 17:41:57,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:57,763 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 614 transitions. [2021-07-09 17:41:57,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:57,763 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 614 transitions. [2021-07-09 17:41:57,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:57,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:57,763 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:57,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3942,840 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:57,964 INFO L430 AbstractCegarLoop]: === Iteration 846 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:57,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:57,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1330815478, now seen corresponding path program 840 times [2021-07-09 17:41:57,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:57,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380024486] [2021-07-09 17:41:57,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:58,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:58,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380024486] [2021-07-09 17:41:58,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380024486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:58,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379507273] [2021-07-09 17:41:58,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 841 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 841 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:58,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:41:58,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:58,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:41:58,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:58,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:58,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:58,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:58,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:58,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:58,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:58,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:58,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:58,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:58,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:58,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:58,354 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:58,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:58,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:58,357 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:58,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:58,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:58,374 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-07-09 17:41:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:58,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379507273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:58,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:58,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:41:58,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402643531] [2021-07-09 17:41:58,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:41:58,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:58,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:41:58,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:41:58,424 INFO L87 Difference]: Start difference. First operand 282 states and 614 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:59,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:59,069 INFO L93 Difference]: Finished difference Result 318 states and 681 transitions. [2021-07-09 17:41:59,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:41:59,069 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:41:59,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:59,069 INFO L225 Difference]: With dead ends: 318 [2021-07-09 17:41:59,069 INFO L226 Difference]: Without dead ends: 305 [2021-07-09 17:41:59,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 668.8ms TimeCoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:41:59,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-07-09 17:41:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 283. [2021-07-09 17:41:59,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.1843971631205674) internal successors, (616), 282 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:59,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 616 transitions. [2021-07-09 17:41:59,072 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 616 transitions. Word has length 20 [2021-07-09 17:41:59,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:59,072 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 616 transitions. [2021-07-09 17:41:59,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:59,072 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 616 transitions. [2021-07-09 17:41:59,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:41:59,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:59,072 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:59,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3943,841 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:59,273 INFO L430 AbstractCegarLoop]: === Iteration 847 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:59,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:59,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1827966546, now seen corresponding path program 841 times [2021-07-09 17:41:59,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:59,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318983221] [2021-07-09 17:41:59,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:59,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:59,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318983221] [2021-07-09 17:41:59,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318983221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:59,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147931991] [2021-07-09 17:41:59,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 842 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 842 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:59,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:41:59,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:59,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:59,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:59,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:59,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:59,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:59,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:59,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:59,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:59,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:59,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:59,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:59,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:59,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:59,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:41:59,639 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:59,690 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-07-09 17:41:59,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:59,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:59,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:41:59,693 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:59,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:59,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:41:59,697 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:41:59,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:59,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:59,719 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:41:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:59,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147931991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:59,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:59,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:41:59,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506311288] [2021-07-09 17:41:59,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:41:59,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:59,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:41:59,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:59,798 INFO L87 Difference]: Start difference. First operand 283 states and 616 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:00,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:00,568 INFO L93 Difference]: Finished difference Result 347 states and 723 transitions. [2021-07-09 17:42:00,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:42:00,568 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:00,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:00,568 INFO L225 Difference]: With dead ends: 347 [2021-07-09 17:42:00,568 INFO L226 Difference]: Without dead ends: 323 [2021-07-09 17:42:00,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 797.1ms TimeCoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:42:00,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-07-09 17:42:00,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 280. [2021-07-09 17:42:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.186379928315412) internal successors, (610), 279 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 610 transitions. [2021-07-09 17:42:00,571 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 610 transitions. Word has length 20 [2021-07-09 17:42:00,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:00,571 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 610 transitions. [2021-07-09 17:42:00,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:00,571 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 610 transitions. [2021-07-09 17:42:00,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:00,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:00,572 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:00,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 842 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3946 [2021-07-09 17:42:00,772 INFO L430 AbstractCegarLoop]: === Iteration 848 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:00,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:00,772 INFO L82 PathProgramCache]: Analyzing trace with hash -775968642, now seen corresponding path program 842 times [2021-07-09 17:42:00,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:00,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706327058] [2021-07-09 17:42:00,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:00,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:00,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706327058] [2021-07-09 17:42:00,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706327058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:00,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457442184] [2021-07-09 17:42:00,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 843 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 843 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:00,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:00,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:00,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:00,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:01,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:01,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:01,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:42:01,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:01,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:01,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:42:01,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:01,161 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:42:01,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:01,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:01,163 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:01,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:01,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:42:01,170 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:42:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:01,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457442184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:01,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:01,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:42:01,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349461498] [2021-07-09 17:42:01,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:42:01,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:01,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:42:01,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:42:01,212 INFO L87 Difference]: Start difference. First operand 280 states and 610 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:01,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:01,561 INFO L93 Difference]: Finished difference Result 304 states and 649 transitions. [2021-07-09 17:42:01,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:42:01,561 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:01,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:01,561 INFO L225 Difference]: With dead ends: 304 [2021-07-09 17:42:01,561 INFO L226 Difference]: Without dead ends: 291 [2021-07-09 17:42:01,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 479.8ms TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:42:01,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-07-09 17:42:01,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 282. [2021-07-09 17:42:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.185053380782918) internal successors, (614), 281 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 614 transitions. [2021-07-09 17:42:01,564 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 614 transitions. Word has length 20 [2021-07-09 17:42:01,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:01,564 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 614 transitions. [2021-07-09 17:42:01,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:01,564 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 614 transitions. [2021-07-09 17:42:01,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:01,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:01,564 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:01,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3949,843 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:01,765 INFO L430 AbstractCegarLoop]: === Iteration 849 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:01,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:01,765 INFO L82 PathProgramCache]: Analyzing trace with hash 360216630, now seen corresponding path program 843 times [2021-07-09 17:42:01,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:01,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013782841] [2021-07-09 17:42:01,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:01,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:01,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013782841] [2021-07-09 17:42:01,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013782841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:01,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361810712] [2021-07-09 17:42:01,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 844 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 844 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:01,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:42:01,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:01,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:42:01,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:02,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:02,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:02,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:02,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:02,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:02,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:02,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:02,110 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:02,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:02,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:02,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:02,113 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:02,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:02,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:02,116 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:02,163 INFO L628 ElimStorePlain]: treesize reduction 71, result has 47.4 percent of original size [2021-07-09 17:42:02,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:02,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:02,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:02,167 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:02,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:02,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:02,170 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:02,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:02,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:02,189 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:161, output treesize:32 [2021-07-09 17:42:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:02,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361810712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:02,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:02,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:42:02,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107517290] [2021-07-09 17:42:02,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:42:02,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:02,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:42:02,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:42:02,278 INFO L87 Difference]: Start difference. First operand 282 states and 614 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:03,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:03,189 INFO L93 Difference]: Finished difference Result 373 states and 771 transitions. [2021-07-09 17:42:03,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:42:03,189 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:03,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:03,189 INFO L225 Difference]: With dead ends: 373 [2021-07-09 17:42:03,189 INFO L226 Difference]: Without dead ends: 347 [2021-07-09 17:42:03,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 940.0ms TimeCoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:42:03,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-07-09 17:42:03,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 281. [2021-07-09 17:42:03,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1857142857142855) internal successors, (612), 280 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:03,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 612 transitions. [2021-07-09 17:42:03,192 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 612 transitions. Word has length 20 [2021-07-09 17:42:03,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:03,192 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 612 transitions. [2021-07-09 17:42:03,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 612 transitions. [2021-07-09 17:42:03,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:03,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:03,193 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:03,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3950,844 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:03,393 INFO L430 AbstractCegarLoop]: === Iteration 850 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:03,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:03,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1785954130, now seen corresponding path program 844 times [2021-07-09 17:42:03,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:03,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138880312] [2021-07-09 17:42:03,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:03,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:03,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138880312] [2021-07-09 17:42:03,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138880312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:03,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404365974] [2021-07-09 17:42:03,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 845 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 845 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:03,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:03,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:03,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:03,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:03,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:03,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:03,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:03,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:03,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:03,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:03,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:03,793 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:42:03,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:03,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:03,796 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:03,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:03,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:03,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:03,822 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:03,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:03,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:03,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:03,845 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:03,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:03,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:03,866 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:03,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:03,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404365974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:03,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:03,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:42:03,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240074646] [2021-07-09 17:42:03,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:42:03,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:03,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:42:03,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:42:03,941 INFO L87 Difference]: Start difference. First operand 281 states and 612 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:04,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:04,444 INFO L93 Difference]: Finished difference Result 341 states and 721 transitions. [2021-07-09 17:42:04,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:42:04,444 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:04,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:04,444 INFO L225 Difference]: With dead ends: 341 [2021-07-09 17:42:04,444 INFO L226 Difference]: Without dead ends: 317 [2021-07-09 17:42:04,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 535.0ms TimeCoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:42:04,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-09 17:42:04,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 278. [2021-07-09 17:42:04,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.191335740072202) internal successors, (607), 277 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 607 transitions. [2021-07-09 17:42:04,447 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 607 transitions. Word has length 20 [2021-07-09 17:42:04,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:04,447 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 607 transitions. [2021-07-09 17:42:04,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:04,447 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 607 transitions. [2021-07-09 17:42:04,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:04,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:04,447 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:04,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 845 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3954 [2021-07-09 17:42:04,648 INFO L430 AbstractCegarLoop]: === Iteration 851 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:04,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:04,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1661766922, now seen corresponding path program 845 times [2021-07-09 17:42:04,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:04,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887394945] [2021-07-09 17:42:04,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:04,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:04,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887394945] [2021-07-09 17:42:04,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887394945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:04,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759211155] [2021-07-09 17:42:04,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 846 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 846 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:04,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:42:04,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:04,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:04,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:04,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:04,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:04,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:42:04,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:04,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:04,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:42:04,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:05,020 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:42:05,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:05,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:05,023 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:05,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:05,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:42:05,030 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:42:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:05,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759211155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:05,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:05,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:42:05,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248525116] [2021-07-09 17:42:05,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:42:05,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:05,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:42:05,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:42:05,065 INFO L87 Difference]: Start difference. First operand 278 states and 607 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:05,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:05,460 INFO L93 Difference]: Finished difference Result 317 states and 676 transitions. [2021-07-09 17:42:05,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:42:05,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:05,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:05,461 INFO L225 Difference]: With dead ends: 317 [2021-07-09 17:42:05,461 INFO L226 Difference]: Without dead ends: 298 [2021-07-09 17:42:05,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 438.0ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:42:05,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-07-09 17:42:05,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 281. [2021-07-09 17:42:05,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1892857142857145) internal successors, (613), 280 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:05,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 613 transitions. [2021-07-09 17:42:05,464 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 613 transitions. Word has length 20 [2021-07-09 17:42:05,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:05,464 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 613 transitions. [2021-07-09 17:42:05,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:05,464 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 613 transitions. [2021-07-09 17:42:05,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:05,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:05,464 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:05,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 846 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3959 [2021-07-09 17:42:05,664 INFO L430 AbstractCegarLoop]: === Iteration 852 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:05,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:05,665 INFO L82 PathProgramCache]: Analyzing trace with hash -525581650, now seen corresponding path program 846 times [2021-07-09 17:42:05,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:05,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876162537] [2021-07-09 17:42:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:05,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:05,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876162537] [2021-07-09 17:42:05,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876162537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:05,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647829273] [2021-07-09 17:42:05,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 847 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 847 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:05,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:42:05,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:05,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:05,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:06,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:06,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:06,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:06,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:06,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:06,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:06,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:06,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:06,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:06,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:06,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:06,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:06,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:06,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:06,018 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:06,073 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-07-09 17:42:06,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:06,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:06,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:06,077 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:06,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:06,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:06,080 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:06,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:06,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:06,102 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:06,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647829273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:06,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:06,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:42:06,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124024998] [2021-07-09 17:42:06,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:42:06,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:06,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:42:06,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:42:06,178 INFO L87 Difference]: Start difference. First operand 281 states and 613 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:06,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:06,662 INFO L93 Difference]: Finished difference Result 338 states and 708 transitions. [2021-07-09 17:42:06,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:42:06,662 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:06,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:06,663 INFO L225 Difference]: With dead ends: 338 [2021-07-09 17:42:06,663 INFO L226 Difference]: Without dead ends: 316 [2021-07-09 17:42:06,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 600.0ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:42:06,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-09 17:42:06,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 277. [2021-07-09 17:42:06,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:06,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-07-09 17:42:06,665 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 20 [2021-07-09 17:42:06,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:06,665 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-07-09 17:42:06,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:06,665 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-07-09 17:42:06,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:06,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:06,666 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:06,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3960,847 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:06,866 INFO L430 AbstractCegarLoop]: === Iteration 853 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:06,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:06,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1623214886, now seen corresponding path program 847 times [2021-07-09 17:42:06,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:06,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747480072] [2021-07-09 17:42:06,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:07,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:07,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747480072] [2021-07-09 17:42:07,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747480072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:07,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514721805] [2021-07-09 17:42:07,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 848 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 848 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:07,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:07,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:07,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:07,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:07,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:07,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:07,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:07,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:07,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:07,284 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:42:07,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:07,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:07,288 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:07,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:07,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:07,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:07,315 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:07,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:07,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:07,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:07,338 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:07,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:07,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:07,359 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:07,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514721805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:07,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:07,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:42:07,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348977292] [2021-07-09 17:42:07,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:42:07,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:07,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:42:07,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:42:07,458 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:08,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:08,082 INFO L93 Difference]: Finished difference Result 342 states and 723 transitions. [2021-07-09 17:42:08,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:42:08,082 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:08,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:08,083 INFO L225 Difference]: With dead ends: 342 [2021-07-09 17:42:08,083 INFO L226 Difference]: Without dead ends: 323 [2021-07-09 17:42:08,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 767.3ms TimeCoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:42:08,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-07-09 17:42:08,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 276. [2021-07-09 17:42:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.192727272727273) internal successors, (603), 275 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 603 transitions. [2021-07-09 17:42:08,085 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 603 transitions. Word has length 20 [2021-07-09 17:42:08,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:08,085 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 603 transitions. [2021-07-09 17:42:08,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 603 transitions. [2021-07-09 17:42:08,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:08,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:08,086 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:08,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3963,848 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:08,286 INFO L430 AbstractCegarLoop]: === Iteration 854 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:08,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:08,286 INFO L82 PathProgramCache]: Analyzing trace with hash -483569234, now seen corresponding path program 848 times [2021-07-09 17:42:08,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:08,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424496306] [2021-07-09 17:42:08,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:08,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:08,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424496306] [2021-07-09 17:42:08,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424496306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:08,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4541931] [2021-07-09 17:42:08,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 849 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 849 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:08,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:08,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:08,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:08,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:08,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:08,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:08,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:08,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:08,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:08,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:08,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:08,748 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-07-09 17:42:08,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:08,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:08,751 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:08,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:08,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:08,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:08,775 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:08,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:08,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:08,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:08,799 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:08,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:08,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:08,819 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:08,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4541931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:08,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:08,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:42:08,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61332599] [2021-07-09 17:42:08,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:42:08,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:08,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:42:08,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:42:08,898 INFO L87 Difference]: Start difference. First operand 276 states and 603 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:09,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:09,544 INFO L93 Difference]: Finished difference Result 350 states and 739 transitions. [2021-07-09 17:42:09,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:42:09,544 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:09,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:09,545 INFO L225 Difference]: With dead ends: 350 [2021-07-09 17:42:09,545 INFO L226 Difference]: Without dead ends: 331 [2021-07-09 17:42:09,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 756.8ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:42:09,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-07-09 17:42:09,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 274. [2021-07-09 17:42:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:09,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-07-09 17:42:09,548 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-07-09 17:42:09,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:09,548 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-07-09 17:42:09,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-07-09 17:42:09,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:09,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:09,548 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:09,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 849 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3968 [2021-07-09 17:42:09,748 INFO L430 AbstractCegarLoop]: === Iteration 855 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:09,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:09,749 INFO L82 PathProgramCache]: Analyzing trace with hash 943257470, now seen corresponding path program 849 times [2021-07-09 17:42:09,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:09,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567602560] [2021-07-09 17:42:09,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:09,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:09,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567602560] [2021-07-09 17:42:09,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567602560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:09,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90833851] [2021-07-09 17:42:09,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 850 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 850 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:09,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:42:09,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:09,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:42:09,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:10,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:10,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:10,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:10,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:10,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:10,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:10,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:10,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:10,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:10,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:10,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:10,083 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:10,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:10,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:10,086 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:10,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:10,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:10,104 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-07-09 17:42:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:10,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90833851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:10,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:10,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:42:10,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90106762] [2021-07-09 17:42:10,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:42:10,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:10,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:42:10,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:42:10,166 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:10,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:10,584 INFO L93 Difference]: Finished difference Result 309 states and 664 transitions. [2021-07-09 17:42:10,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:42:10,585 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:10,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:10,585 INFO L225 Difference]: With dead ends: 309 [2021-07-09 17:42:10,585 INFO L226 Difference]: Without dead ends: 296 [2021-07-09 17:42:10,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 475.0ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:42:10,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-07-09 17:42:10,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 278. [2021-07-09 17:42:10,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.191335740072202) internal successors, (607), 277 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 607 transitions. [2021-07-09 17:42:10,588 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 607 transitions. Word has length 20 [2021-07-09 17:42:10,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:10,588 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 607 transitions. [2021-07-09 17:42:10,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:10,588 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 607 transitions. [2021-07-09 17:42:10,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:10,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:10,588 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:10,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3973,850 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:10,789 INFO L430 AbstractCegarLoop]: === Iteration 856 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:10,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:10,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2079442742, now seen corresponding path program 850 times [2021-07-09 17:42:10,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:10,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724807851] [2021-07-09 17:42:10,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:10,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:10,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724807851] [2021-07-09 17:42:10,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724807851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:10,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411459665] [2021-07-09 17:42:10,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 851 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 851 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:10,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:10,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:10,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:10,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:11,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:11,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:11,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:11,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:11,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:11,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:11,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:11,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:11,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:11,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:11,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:11,092 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:11,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:11,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:11,096 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:11,149 INFO L628 ElimStorePlain]: treesize reduction 83, result has 43.5 percent of original size [2021-07-09 17:42:11,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:11,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:11,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:11,153 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:11,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:11,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:11,156 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:11,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:11,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:11,179 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:11,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411459665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:11,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:11,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:42:11,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556920412] [2021-07-09 17:42:11,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:42:11,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:11,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:42:11,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:42:11,250 INFO L87 Difference]: Start difference. First operand 278 states and 607 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:11,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:11,638 INFO L93 Difference]: Finished difference Result 336 states and 702 transitions. [2021-07-09 17:42:11,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:42:11,638 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:11,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:11,638 INFO L225 Difference]: With dead ends: 336 [2021-07-09 17:42:11,638 INFO L226 Difference]: Without dead ends: 312 [2021-07-09 17:42:11,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 435.7ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:42:11,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-07-09 17:42:11,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 275. [2021-07-09 17:42:11,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:11,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-07-09 17:42:11,641 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-07-09 17:42:11,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:11,641 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-07-09 17:42:11,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:11,641 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-07-09 17:42:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:11,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:11,641 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:11,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3976,851 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:11,842 INFO L430 AbstractCegarLoop]: === Iteration 857 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:11,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:11,842 INFO L82 PathProgramCache]: Analyzing trace with hash -66728018, now seen corresponding path program 851 times [2021-07-09 17:42:11,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:11,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637774878] [2021-07-09 17:42:11,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:12,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:12,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637774878] [2021-07-09 17:42:12,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637774878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:12,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245399971] [2021-07-09 17:42:12,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 852 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 852 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:12,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:42:12,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:12,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:12,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:12,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:12,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:12,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:12,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:12,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:12,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:12,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:12,279 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:42:12,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:12,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:12,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:12,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:12,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:12,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:12,307 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:12,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:12,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:12,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:12,330 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:12,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:12,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:12,351 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:12,435 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:12,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245399971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:12,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:12,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:42:12,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590324172] [2021-07-09 17:42:12,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:42:12,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:12,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:42:12,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:42:12,435 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:13,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:13,066 INFO L93 Difference]: Finished difference Result 351 states and 737 transitions. [2021-07-09 17:42:13,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:42:13,066 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:13,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:13,067 INFO L225 Difference]: With dead ends: 351 [2021-07-09 17:42:13,067 INFO L226 Difference]: Without dead ends: 327 [2021-07-09 17:42:13,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 720.4ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:42:13,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-09 17:42:13,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 272. [2021-07-09 17:42:13,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.195571955719557) internal successors, (595), 271 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 595 transitions. [2021-07-09 17:42:13,069 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 595 transitions. Word has length 20 [2021-07-09 17:42:13,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:13,070 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 595 transitions. [2021-07-09 17:42:13,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:13,070 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 595 transitions. [2021-07-09 17:42:13,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:13,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:13,070 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:13,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 852 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3979 [2021-07-09 17:42:13,270 INFO L430 AbstractCegarLoop]: === Iteration 858 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:13,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:13,271 INFO L82 PathProgramCache]: Analyzing trace with hash 2121455158, now seen corresponding path program 852 times [2021-07-09 17:42:13,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:13,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058661607] [2021-07-09 17:42:13,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:13,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:13,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058661607] [2021-07-09 17:42:13,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058661607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:13,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194733568] [2021-07-09 17:42:13,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 853 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 853 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:13,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:42:13,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:13,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:13,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:13,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:13,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:13,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:13,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:13,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:13,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:13,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:13,762 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:42:13,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:13,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:13,766 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:13,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:13,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:13,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:13,791 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:13,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:13,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:13,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:13,815 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:13,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:13,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:13,835 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:13,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194733568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:13,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:13,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:42:13,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534782314] [2021-07-09 17:42:13,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:42:13,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:13,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:42:13,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:42:13,913 INFO L87 Difference]: Start difference. First operand 272 states and 595 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:14,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:14,695 INFO L93 Difference]: Finished difference Result 369 states and 764 transitions. [2021-07-09 17:42:14,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:42:14,696 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:14,696 INFO L225 Difference]: With dead ends: 369 [2021-07-09 17:42:14,696 INFO L226 Difference]: Without dead ends: 336 [2021-07-09 17:42:14,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 915.2ms TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:42:14,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-07-09 17:42:14,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 271. [2021-07-09 17:42:14,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.196296296296296) internal successors, (593), 270 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 593 transitions. [2021-07-09 17:42:14,699 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 593 transitions. Word has length 20 [2021-07-09 17:42:14,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:14,699 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 593 transitions. [2021-07-09 17:42:14,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:14,699 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 593 transitions. [2021-07-09 17:42:14,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:14,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:14,699 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:14,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3984,853 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:14,900 INFO L430 AbstractCegarLoop]: === Iteration 859 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:14,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1235656878, now seen corresponding path program 853 times [2021-07-09 17:42:14,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:14,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185190294] [2021-07-09 17:42:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:15,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:15,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185190294] [2021-07-09 17:42:15,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185190294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:15,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678923581] [2021-07-09 17:42:15,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 854 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 854 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:15,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:15,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:15,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:15,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:15,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:15,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:15,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:15,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:15,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:15,382 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:42:15,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:15,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:15,386 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:15,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:15,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:15,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:15,411 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:15,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:15,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:15,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:15,435 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:15,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:15,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:15,456 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:15,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678923581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:15,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:15,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:42:15,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173725693] [2021-07-09 17:42:15,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:42:15,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:15,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:42:15,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:42:15,535 INFO L87 Difference]: Start difference. First operand 271 states and 593 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:15,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:15,981 INFO L93 Difference]: Finished difference Result 335 states and 709 transitions. [2021-07-09 17:42:15,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:42:15,981 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:15,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:15,982 INFO L225 Difference]: With dead ends: 335 [2021-07-09 17:42:15,982 INFO L226 Difference]: Without dead ends: 316 [2021-07-09 17:42:15,982 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 577.5ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:42:15,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-09 17:42:15,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 269. [2021-07-09 17:42:15,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.1977611940298507) internal successors, (589), 268 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:15,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 589 transitions. [2021-07-09 17:42:15,984 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 589 transitions. Word has length 20 [2021-07-09 17:42:15,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:15,984 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 589 transitions. [2021-07-09 17:42:15,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:15,984 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 589 transitions. [2021-07-09 17:42:15,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:15,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:15,985 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:16,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 854 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3989 [2021-07-09 17:42:16,185 INFO L430 AbstractCegarLoop]: === Iteration 860 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:16,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:16,185 INFO L82 PathProgramCache]: Analyzing trace with hash 94634998, now seen corresponding path program 854 times [2021-07-09 17:42:16,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:16,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131286506] [2021-07-09 17:42:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:16,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:16,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131286506] [2021-07-09 17:42:16,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131286506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:16,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852190495] [2021-07-09 17:42:16,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 855 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 855 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:16,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:16,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:16,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:16,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:16,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:16,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:16,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:42:16,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:16,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:16,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:42:16,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:16,574 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-07-09 17:42:16,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:16,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:42:16,576 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:16,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:16,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:42:16,583 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:42:16,618 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:16,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852190495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:16,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:16,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:42:16,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843120709] [2021-07-09 17:42:16,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:42:16,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:16,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:42:16,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:42:16,618 INFO L87 Difference]: Start difference. First operand 269 states and 589 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:17,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:17,013 INFO L93 Difference]: Finished difference Result 303 states and 652 transitions. [2021-07-09 17:42:17,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:42:17,014 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:17,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:17,014 INFO L225 Difference]: With dead ends: 303 [2021-07-09 17:42:17,014 INFO L226 Difference]: Without dead ends: 290 [2021-07-09 17:42:17,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 452.3ms TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:42:17,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-07-09 17:42:17,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 274. [2021-07-09 17:42:17,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:17,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-07-09 17:42:17,016 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-07-09 17:42:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:17,017 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-07-09 17:42:17,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:17,017 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-07-09 17:42:17,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:17,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:17,017 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:17,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3994,855 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:17,217 INFO L430 AbstractCegarLoop]: === Iteration 861 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:17,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:17,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1230820270, now seen corresponding path program 855 times [2021-07-09 17:42:17,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:17,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329689111] [2021-07-09 17:42:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:17,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:17,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329689111] [2021-07-09 17:42:17,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329689111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:17,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366433882] [2021-07-09 17:42:17,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 856 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 856 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:17,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:42:17,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:17,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:42:17,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:17,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:17,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:17,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:17,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:17,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:17,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:17,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:17,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:17,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:17,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:17,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:17,600 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:17,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:17,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:17,603 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:17,649 INFO L628 ElimStorePlain]: treesize reduction 74, result has 46.4 percent of original size [2021-07-09 17:42:17,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:17,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:17,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:17,653 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:17,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:17,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:17,658 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:17,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:17,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:17,677 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:161, output treesize:32 [2021-07-09 17:42:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:17,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366433882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:17,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:17,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:42:17,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094947234] [2021-07-09 17:42:17,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:42:17,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:17,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:42:17,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:42:17,767 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:18,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:18,399 INFO L93 Difference]: Finished difference Result 326 states and 687 transitions. [2021-07-09 17:42:18,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:42:18,399 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:18,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:18,399 INFO L225 Difference]: With dead ends: 326 [2021-07-09 17:42:18,400 INFO L226 Difference]: Without dead ends: 308 [2021-07-09 17:42:18,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 689.4ms TimeCoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:42:18,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-07-09 17:42:18,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 274. [2021-07-09 17:42:18,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:18,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-07-09 17:42:18,402 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-07-09 17:42:18,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:18,402 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-07-09 17:42:18,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:18,402 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-07-09 17:42:18,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:18,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:18,403 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:18,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,856 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:18,603 INFO L430 AbstractCegarLoop]: === Iteration 862 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:18,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:18,603 INFO L82 PathProgramCache]: Analyzing trace with hash -915350490, now seen corresponding path program 856 times [2021-07-09 17:42:18,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:18,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293338454] [2021-07-09 17:42:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:18,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:18,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293338454] [2021-07-09 17:42:18,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293338454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:18,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617950552] [2021-07-09 17:42:18,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 857 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 857 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:18,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:18,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:18,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:18,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:18,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:18,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:18,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:18,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:18,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:18,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:18,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:19,059 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:42:19,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:19,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:19,063 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:19,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:19,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:19,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:19,087 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:19,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:19,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:19,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:19,111 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:19,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:19,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:19,132 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:19,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617950552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:19,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:19,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:42:19,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837701929] [2021-07-09 17:42:19,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:42:19,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:19,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:42:19,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:42:19,210 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:19,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:19,827 INFO L93 Difference]: Finished difference Result 341 states and 721 transitions. [2021-07-09 17:42:19,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:42:19,827 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:19,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:19,827 INFO L225 Difference]: With dead ends: 341 [2021-07-09 17:42:19,827 INFO L226 Difference]: Without dead ends: 322 [2021-07-09 17:42:19,828 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 713.1ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:42:19,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-07-09 17:42:19,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 273. [2021-07-09 17:42:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:19,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-07-09 17:42:19,830 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-07-09 17:42:19,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:19,830 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-07-09 17:42:19,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:19,830 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-07-09 17:42:19,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:19,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:19,831 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:20,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 857 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3999 [2021-07-09 17:42:20,031 INFO L430 AbstractCegarLoop]: === Iteration 863 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:20,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:20,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1272832686, now seen corresponding path program 857 times [2021-07-09 17:42:20,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:20,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135096673] [2021-07-09 17:42:20,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:20,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:20,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135096673] [2021-07-09 17:42:20,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135096673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:20,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580317366] [2021-07-09 17:42:20,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 858 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 858 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:20,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:42:20,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:20,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:20,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:20,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:20,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:20,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:20,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:20,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:20,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:20,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:20,502 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-07-09 17:42:20,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:20,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:20,505 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:20,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:20,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:20,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:20,530 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:20,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:20,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:20,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:20,554 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:20,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:20,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:20,574 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:20,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580317366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:20,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:20,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:42:20,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387073384] [2021-07-09 17:42:20,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:42:20,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:20,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:42:20,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:42:20,654 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:21,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:21,438 INFO L93 Difference]: Finished difference Result 373 states and 772 transitions. [2021-07-09 17:42:21,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:42:21,439 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:21,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:21,439 INFO L225 Difference]: With dead ends: 373 [2021-07-09 17:42:21,439 INFO L226 Difference]: Without dead ends: 340 [2021-07-09 17:42:21,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 836.0ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:42:21,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-07-09 17:42:21,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 273. [2021-07-09 17:42:21,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-07-09 17:42:21,442 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-07-09 17:42:21,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:21,442 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-07-09 17:42:21,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:21,442 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-07-09 17:42:21,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:21,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:21,442 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:21,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4004,858 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:21,643 INFO L430 AbstractCegarLoop]: === Iteration 864 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:21,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:21,643 INFO L82 PathProgramCache]: Analyzing trace with hash 387034406, now seen corresponding path program 858 times [2021-07-09 17:42:21,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:21,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793737775] [2021-07-09 17:42:21,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:21,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:21,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793737775] [2021-07-09 17:42:21,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793737775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:21,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050074626] [2021-07-09 17:42:21,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 859 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 859 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:21,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:42:21,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:21,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:21,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:22,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:22,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:22,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:22,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:22,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:22,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:22,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:22,162 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:42:22,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:22,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:22,166 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:22,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:22,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:22,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:22,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:22,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:22,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:22,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:22,215 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:22,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:22,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:22,236 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:22,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050074626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:22,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:22,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:42:22,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846321207] [2021-07-09 17:42:22,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:42:22,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:22,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:42:22,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:42:22,319 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:23,400 INFO L93 Difference]: Finished difference Result 396 states and 813 transitions. [2021-07-09 17:42:23,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:42:23,400 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:23,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:23,401 INFO L225 Difference]: With dead ends: 396 [2021-07-09 17:42:23,401 INFO L226 Difference]: Without dead ends: 356 [2021-07-09 17:42:23,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1105.8ms TimeCoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:42:23,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-07-09 17:42:23,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 273. [2021-07-09 17:42:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:23,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-07-09 17:42:23,403 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-07-09 17:42:23,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:23,404 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-07-09 17:42:23,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:23,404 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-07-09 17:42:23,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:23,404 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:23,404 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:23,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4009,859 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:23,604 INFO L430 AbstractCegarLoop]: === Iteration 865 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:23,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:23,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1302908498, now seen corresponding path program 859 times [2021-07-09 17:42:23,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:23,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596599468] [2021-07-09 17:42:23,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:23,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:23,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596599468] [2021-07-09 17:42:23,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596599468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:23,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232538228] [2021-07-09 17:42:23,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 860 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 860 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:23,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:23,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:24,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:24,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:24,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:24,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:24,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:24,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:24,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:24,146 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:42:24,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:24,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:24,150 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:24,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:24,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:24,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:24,175 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:24,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:24,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:24,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:24,199 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:24,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:24,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:24,220 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:24,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232538228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:24,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:24,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:42:24,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419876821] [2021-07-09 17:42:24,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:42:24,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:24,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:42:24,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:42:24,303 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:24,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:24,790 INFO L93 Difference]: Finished difference Result 336 states and 711 transitions. [2021-07-09 17:42:24,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:42:24,790 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:24,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:24,791 INFO L225 Difference]: With dead ends: 336 [2021-07-09 17:42:24,791 INFO L226 Difference]: Without dead ends: 317 [2021-07-09 17:42:24,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 613.6ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:42:24,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-09 17:42:24,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 273. [2021-07-09 17:42:24,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:24,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-07-09 17:42:24,793 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-07-09 17:42:24,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:24,794 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-07-09 17:42:24,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:24,794 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-07-09 17:42:24,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:24,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:24,794 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:24,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4014,860 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:24,994 INFO L430 AbstractCegarLoop]: === Iteration 866 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:24,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:24,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1245196386, now seen corresponding path program 860 times [2021-07-09 17:42:24,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:24,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546267641] [2021-07-09 17:42:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:25,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:25,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546267641] [2021-07-09 17:42:25,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546267641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:25,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735793647] [2021-07-09 17:42:25,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 861 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 861 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:25,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:25,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:25,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:25,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:25,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:25,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:25,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:42:25,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:25,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:25,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:42:25,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:25,380 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:42:25,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:25,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:25,383 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:25,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:25,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:42:25,390 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:42:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:25,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735793647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:25,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:25,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:42:25,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123956554] [2021-07-09 17:42:25,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:42:25,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:25,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:42:25,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:42:25,427 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:25,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:25,836 INFO L93 Difference]: Finished difference Result 301 states and 642 transitions. [2021-07-09 17:42:25,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:42:25,836 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:25,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:25,836 INFO L225 Difference]: With dead ends: 301 [2021-07-09 17:42:25,836 INFO L226 Difference]: Without dead ends: 285 [2021-07-09 17:42:25,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 458.4ms TimeCoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:42:25,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-07-09 17:42:25,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 274. [2021-07-09 17:42:25,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:25,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-07-09 17:42:25,839 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-07-09 17:42:25,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:25,839 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-07-09 17:42:25,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:25,839 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-07-09 17:42:25,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:25,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:25,839 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:26,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4019,861 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:26,040 INFO L430 AbstractCegarLoop]: === Iteration 867 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:26,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:26,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2107201450, now seen corresponding path program 861 times [2021-07-09 17:42:26,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:26,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669692963] [2021-07-09 17:42:26,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:26,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:26,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669692963] [2021-07-09 17:42:26,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669692963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:26,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218213776] [2021-07-09 17:42:26,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 862 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 862 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:26,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:42:26,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:26,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:42:26,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:26,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:26,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:26,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:26,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:26,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:26,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:26,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:26,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:26,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:26,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:26,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:26,380 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:26,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:26,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:26,383 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:26,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:26,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:26,400 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-07-09 17:42:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:26,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218213776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:26,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:26,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:42:26,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284645145] [2021-07-09 17:42:26,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:42:26,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:26,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:42:26,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:42:26,453 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:27,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:27,273 INFO L93 Difference]: Finished difference Result 305 states and 654 transitions. [2021-07-09 17:42:27,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:42:27,274 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:27,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:27,274 INFO L225 Difference]: With dead ends: 305 [2021-07-09 17:42:27,274 INFO L226 Difference]: Without dead ends: 292 [2021-07-09 17:42:27,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 696.9ms TimeCoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:42:27,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-07-09 17:42:27,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 275. [2021-07-09 17:42:27,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:27,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-07-09 17:42:27,276 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-07-09 17:42:27,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:27,277 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-07-09 17:42:27,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:27,277 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-07-09 17:42:27,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:27,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:27,277 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:27,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 862 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4020 [2021-07-09 17:42:27,477 INFO L430 AbstractCegarLoop]: === Iteration 868 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:27,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:27,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1051580574, now seen corresponding path program 862 times [2021-07-09 17:42:27,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:27,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580429048] [2021-07-09 17:42:27,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:27,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:27,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580429048] [2021-07-09 17:42:27,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580429048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:27,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067812076] [2021-07-09 17:42:27,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 863 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 863 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:27,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:27,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:27,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:27,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:27,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:27,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:27,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:27,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:27,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:27,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:27,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:27,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:27,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:27,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:27,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:27,861 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:27,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:27,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:27,864 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:27,914 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-07-09 17:42:27,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:27,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:27,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:27,918 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:27,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:27,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:27,921 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:27,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:27,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:27,943 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:28,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067812076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:28,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:28,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:42:28,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784135489] [2021-07-09 17:42:28,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:42:28,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:28,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:42:28,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:42:28,021 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:28,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:28,731 INFO L93 Difference]: Finished difference Result 305 states and 652 transitions. [2021-07-09 17:42:28,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:42:28,732 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:28,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:28,732 INFO L225 Difference]: With dead ends: 305 [2021-07-09 17:42:28,732 INFO L226 Difference]: Without dead ends: 293 [2021-07-09 17:42:28,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 761.5ms TimeCoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:42:28,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-07-09 17:42:28,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 273. [2021-07-09 17:42:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-07-09 17:42:28,735 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-07-09 17:42:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:28,735 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-07-09 17:42:28,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-07-09 17:42:28,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:28,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:28,735 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:28,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 863 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4023 [2021-07-09 17:42:28,935 INFO L430 AbstractCegarLoop]: === Iteration 869 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:28,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:28,936 INFO L82 PathProgramCache]: Analyzing trace with hash 417330, now seen corresponding path program 863 times [2021-07-09 17:42:28,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:28,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135862521] [2021-07-09 17:42:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:29,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:29,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135862521] [2021-07-09 17:42:29,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135862521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:29,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507292860] [2021-07-09 17:42:29,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 864 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 864 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:29,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:42:29,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:29,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:29,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:29,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:29,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:29,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:42:29,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:29,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:29,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:42:29,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:29,314 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:42:29,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:29,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:29,317 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:29,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:29,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:42:29,324 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:42:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:29,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507292860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:29,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:29,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:42:29,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053807313] [2021-07-09 17:42:29,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:42:29,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:29,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:42:29,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:42:29,362 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:29,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:29,732 INFO L93 Difference]: Finished difference Result 297 states and 635 transitions. [2021-07-09 17:42:29,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:42:29,732 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:29,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:29,732 INFO L225 Difference]: With dead ends: 297 [2021-07-09 17:42:29,733 INFO L226 Difference]: Without dead ends: 284 [2021-07-09 17:42:29,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 471.5ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:42:29,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-07-09 17:42:29,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 275. [2021-07-09 17:42:29,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:29,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-07-09 17:42:29,735 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-07-09 17:42:29,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:29,735 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-07-09 17:42:29,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:29,735 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-07-09 17:42:29,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:29,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:29,735 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:29,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 864 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4026 [2021-07-09 17:42:29,936 INFO L430 AbstractCegarLoop]: === Iteration 870 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:29,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:29,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1136602602, now seen corresponding path program 864 times [2021-07-09 17:42:29,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:29,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583395907] [2021-07-09 17:42:29,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:30,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:30,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583395907] [2021-07-09 17:42:30,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583395907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:30,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159310054] [2021-07-09 17:42:30,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 865 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 865 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:30,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:42:30,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:30,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:42:30,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:30,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:30,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:30,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:30,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:30,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:30,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:30,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:30,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:30,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:30,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:30,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:30,304 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:30,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:30,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:30,307 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:30,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:30,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:30,328 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-07-09 17:42:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:30,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159310054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:30,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:30,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:42:30,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660852912] [2021-07-09 17:42:30,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:42:30,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:30,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:42:30,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:42:30,421 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:30,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:30,980 INFO L93 Difference]: Finished difference Result 298 states and 643 transitions. [2021-07-09 17:42:30,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:42:30,980 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:30,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:30,981 INFO L225 Difference]: With dead ends: 298 [2021-07-09 17:42:30,981 INFO L226 Difference]: Without dead ends: 291 [2021-07-09 17:42:30,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 649.2ms TimeCoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:42:30,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-07-09 17:42:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 274. [2021-07-09 17:42:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-07-09 17:42:30,983 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-07-09 17:42:30,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:30,983 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-07-09 17:42:30,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-07-09 17:42:30,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:30,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:30,984 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:31,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4027,865 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:31,184 INFO L430 AbstractCegarLoop]: === Iteration 871 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:31,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:31,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1009568158, now seen corresponding path program 865 times [2021-07-09 17:42:31,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:31,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488589005] [2021-07-09 17:42:31,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:31,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:31,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488589005] [2021-07-09 17:42:31,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488589005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:31,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775585863] [2021-07-09 17:42:31,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 866 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 866 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:31,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:31,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:31,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:31,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:31,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:31,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:31,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:31,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:31,549 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:31,608 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:42:31,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:31,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:31,612 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:31,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:31,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:31,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:31,637 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:31,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:31,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:31,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:31,661 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:31,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:31,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:31,682 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:31,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775585863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:31,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:31,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:42:31,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207217154] [2021-07-09 17:42:31,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:42:31,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:31,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:42:31,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:42:31,763 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:32,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:32,526 INFO L93 Difference]: Finished difference Result 359 states and 746 transitions. [2021-07-09 17:42:32,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:42:32,526 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:32,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:32,527 INFO L225 Difference]: With dead ends: 359 [2021-07-09 17:42:32,527 INFO L226 Difference]: Without dead ends: 333 [2021-07-09 17:42:32,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 820.6ms TimeCoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:42:32,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-07-09 17:42:32,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 274. [2021-07-09 17:42:32,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:32,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-07-09 17:42:32,529 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-07-09 17:42:32,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:32,530 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-07-09 17:42:32,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:32,530 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-07-09 17:42:32,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:32,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:32,530 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:32,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4032,866 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:32,730 INFO L430 AbstractCegarLoop]: === Iteration 872 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:32,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:32,731 INFO L82 PathProgramCache]: Analyzing trace with hash -885380950, now seen corresponding path program 866 times [2021-07-09 17:42:32,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:32,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033711384] [2021-07-09 17:42:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:32,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:32,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033711384] [2021-07-09 17:42:32,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033711384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:32,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411324234] [2021-07-09 17:42:32,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 867 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 867 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:32,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:32,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:32,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:32,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:33,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:33,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:33,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:42:33,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:33,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:33,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:42:33,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:33,086 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-07-09 17:42:33,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:33,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:33,089 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:33,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:33,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:42:33,096 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:42:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:33,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411324234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:33,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:33,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:42:33,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592886993] [2021-07-09 17:42:33,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:42:33,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:33,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:42:33,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:42:33,131 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:33,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:33,572 INFO L93 Difference]: Finished difference Result 308 states and 660 transitions. [2021-07-09 17:42:33,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:42:33,573 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:33,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:33,573 INFO L225 Difference]: With dead ends: 308 [2021-07-09 17:42:33,573 INFO L226 Difference]: Without dead ends: 295 [2021-07-09 17:42:33,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 478.8ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:42:33,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-07-09 17:42:33,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 277. [2021-07-09 17:42:33,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:33,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-07-09 17:42:33,576 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 20 [2021-07-09 17:42:33,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:33,576 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-07-09 17:42:33,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:33,576 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-07-09 17:42:33,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:33,576 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:33,576 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:33,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4037,867 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:33,777 INFO L430 AbstractCegarLoop]: === Iteration 873 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:33,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:33,777 INFO L82 PathProgramCache]: Analyzing trace with hash 250804322, now seen corresponding path program 867 times [2021-07-09 17:42:33,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:33,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746980945] [2021-07-09 17:42:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:33,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:33,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746980945] [2021-07-09 17:42:33,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746980945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:33,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143237800] [2021-07-09 17:42:33,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 868 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 868 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:33,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:42:33,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:33,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:42:33,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:34,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:34,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:34,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:34,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:34,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:34,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:34,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:34,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:34,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:34,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:34,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:34,070 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:34,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:34,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:34,073 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:34,118 INFO L628 ElimStorePlain]: treesize reduction 74, result has 46.4 percent of original size [2021-07-09 17:42:34,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:34,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:34,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:34,122 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:34,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:34,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:34,125 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:34,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:34,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:34,148 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:161, output treesize:32 [2021-07-09 17:42:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:34,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143237800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:34,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:34,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:42:34,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289836996] [2021-07-09 17:42:34,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:42:34,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:34,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:42:34,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:42:34,226 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:34,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:34,818 INFO L93 Difference]: Finished difference Result 306 states and 654 transitions. [2021-07-09 17:42:34,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:42:34,818 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:34,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:34,819 INFO L225 Difference]: With dead ends: 306 [2021-07-09 17:42:34,819 INFO L226 Difference]: Without dead ends: 294 [2021-07-09 17:42:34,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 586.2ms TimeCoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:42:34,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-07-09 17:42:34,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 276. [2021-07-09 17:42:34,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.192727272727273) internal successors, (603), 275 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:34,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 603 transitions. [2021-07-09 17:42:34,821 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 603 transitions. Word has length 20 [2021-07-09 17:42:34,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:34,821 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 603 transitions. [2021-07-09 17:42:34,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:34,822 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 603 transitions. [2021-07-09 17:42:34,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:34,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:34,822 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:35,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4038,868 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:35,022 INFO L430 AbstractCegarLoop]: === Iteration 874 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:35,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:35,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1895366438, now seen corresponding path program 868 times [2021-07-09 17:42:35,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:35,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739542332] [2021-07-09 17:42:35,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:35,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:35,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739542332] [2021-07-09 17:42:35,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739542332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:35,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709894535] [2021-07-09 17:42:35,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 869 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 869 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:35,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:35,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:35,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:35,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:35,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:35,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:35,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:35,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:35,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:35,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:35,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:35,422 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:42:35,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:35,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:35,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:35,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:35,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:35,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:35,450 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:35,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:35,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:35,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:35,476 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:35,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:35,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:35,497 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:35,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709894535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:35,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:35,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:42:35,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526128276] [2021-07-09 17:42:35,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:42:35,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:35,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:42:35,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:42:35,572 INFO L87 Difference]: Start difference. First operand 276 states and 603 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:36,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:36,134 INFO L93 Difference]: Finished difference Result 346 states and 730 transitions. [2021-07-09 17:42:36,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:42:36,134 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:36,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:36,135 INFO L225 Difference]: With dead ends: 346 [2021-07-09 17:42:36,135 INFO L226 Difference]: Without dead ends: 327 [2021-07-09 17:42:36,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 644.1ms TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:42:36,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-09 17:42:36,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 275. [2021-07-09 17:42:36,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-07-09 17:42:36,138 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-07-09 17:42:36,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:36,138 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-07-09 17:42:36,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:36,138 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-07-09 17:42:36,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:36,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:36,138 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:36,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 869 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4042 [2021-07-09 17:42:36,339 INFO L430 AbstractCegarLoop]: === Iteration 875 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:36,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:36,339 INFO L82 PathProgramCache]: Analyzing trace with hash 292816738, now seen corresponding path program 869 times [2021-07-09 17:42:36,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:36,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104165305] [2021-07-09 17:42:36,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:36,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:36,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104165305] [2021-07-09 17:42:36,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104165305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:36,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638988760] [2021-07-09 17:42:36,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 870 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 870 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:36,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:42:36,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:36,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:36,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:36,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:36,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:36,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:36,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:36,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:36,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:36,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:36,791 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:42:36,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:36,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:36,795 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:36,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:36,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:36,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:36,820 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:36,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:36,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:36,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:36,845 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:36,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:36,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:36,865 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:36,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638988760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:36,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:36,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:42:36,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67784279] [2021-07-09 17:42:36,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:42:36,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:36,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:42:36,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:42:36,945 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:37,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:37,657 INFO L93 Difference]: Finished difference Result 355 states and 748 transitions. [2021-07-09 17:42:37,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:42:37,657 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:37,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:37,658 INFO L225 Difference]: With dead ends: 355 [2021-07-09 17:42:37,658 INFO L226 Difference]: Without dead ends: 336 [2021-07-09 17:42:37,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 793.4ms TimeCoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:42:37,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-07-09 17:42:37,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 274. [2021-07-09 17:42:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-07-09 17:42:37,660 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-07-09 17:42:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:37,661 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-07-09 17:42:37,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:37,661 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-07-09 17:42:37,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:37,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:37,661 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:37,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4047,870 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:37,861 INFO L430 AbstractCegarLoop]: === Iteration 876 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:37,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1719643442, now seen corresponding path program 870 times [2021-07-09 17:42:37,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:37,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488510964] [2021-07-09 17:42:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:38,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:38,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488510964] [2021-07-09 17:42:38,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488510964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:38,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405514552] [2021-07-09 17:42:38,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 871 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 871 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:38,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:42:38,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:38,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:38,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:38,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:38,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:38,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:42:38,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:38,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:38,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:42:38,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:38,219 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:42:38,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:38,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:38,223 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:38,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:38,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:42:38,230 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:42:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:38,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405514552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:38,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:38,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:42:38,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584906721] [2021-07-09 17:42:38,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:42:38,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:38,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:42:38,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:42:38,267 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:38,632 INFO L93 Difference]: Finished difference Result 311 states and 663 transitions. [2021-07-09 17:42:38,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:42:38,632 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:38,633 INFO L225 Difference]: With dead ends: 311 [2021-07-09 17:42:38,633 INFO L226 Difference]: Without dead ends: 298 [2021-07-09 17:42:38,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 443.8ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:42:38,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-07-09 17:42:38,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 278. [2021-07-09 17:42:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.191335740072202) internal successors, (607), 277 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:38,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 607 transitions. [2021-07-09 17:42:38,635 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 607 transitions. Word has length 20 [2021-07-09 17:42:38,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:38,635 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 607 transitions. [2021-07-09 17:42:38,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:38,636 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 607 transitions. [2021-07-09 17:42:38,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:38,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:38,636 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:38,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 871 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4052 [2021-07-09 17:42:38,836 INFO L430 AbstractCegarLoop]: === Iteration 877 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:38,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:38,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1439138582, now seen corresponding path program 871 times [2021-07-09 17:42:38,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:38,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267399898] [2021-07-09 17:42:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:38,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:38,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:38,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267399898] [2021-07-09 17:42:38,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267399898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:38,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332944904] [2021-07-09 17:42:38,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 872 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 872 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:39,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:39,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:39,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:39,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:39,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:39,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:39,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:39,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:39,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:39,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:39,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:39,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:39,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:39,140 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:39,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:39,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:39,144 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:39,204 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-07-09 17:42:39,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:39,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:39,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:39,209 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:39,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:39,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:39,212 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:39,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:39,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:39,235 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:39,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332944904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:39,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:39,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:42:39,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161710110] [2021-07-09 17:42:39,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:42:39,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:39,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:42:39,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:42:39,307 INFO L87 Difference]: Start difference. First operand 278 states and 607 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:39,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:39,798 INFO L93 Difference]: Finished difference Result 340 states and 714 transitions. [2021-07-09 17:42:39,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:42:39,799 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:39,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:39,799 INFO L225 Difference]: With dead ends: 340 [2021-07-09 17:42:39,799 INFO L226 Difference]: Without dead ends: 321 [2021-07-09 17:42:39,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 494.8ms TimeCoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:42:39,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-09 17:42:39,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 277. [2021-07-09 17:42:39,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:39,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-07-09 17:42:39,802 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 20 [2021-07-09 17:42:39,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:39,802 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-07-09 17:42:39,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:39,802 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-07-09 17:42:39,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:39,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:39,802 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:40,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 872 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4053 [2021-07-09 17:42:40,003 INFO L430 AbstractCegarLoop]: === Iteration 878 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:40,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:40,003 INFO L82 PathProgramCache]: Analyzing trace with hash 709657954, now seen corresponding path program 872 times [2021-07-09 17:42:40,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:40,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241764396] [2021-07-09 17:42:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:40,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:40,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241764396] [2021-07-09 17:42:40,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241764396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:40,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492151810] [2021-07-09 17:42:40,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 873 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 873 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:40,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:40,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:40,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:40,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:40,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:40,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:40,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:40,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:40,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:40,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:40,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:40,434 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:42:40,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:40,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:40,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:40,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:40,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:40,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:40,462 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:40,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:40,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:40,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:40,486 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:40,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:40,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:40,507 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:40,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492151810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:40,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:40,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:42:40,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610961655] [2021-07-09 17:42:40,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:42:40,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:40,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:42:40,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:42:40,586 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:41,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:41,330 INFO L93 Difference]: Finished difference Result 351 states and 740 transitions. [2021-07-09 17:42:41,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:42:41,331 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:41,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:41,331 INFO L225 Difference]: With dead ends: 351 [2021-07-09 17:42:41,331 INFO L226 Difference]: Without dead ends: 332 [2021-07-09 17:42:41,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 832.9ms TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:42:41,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-07-09 17:42:41,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 276. [2021-07-09 17:42:41,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.192727272727273) internal successors, (603), 275 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 603 transitions. [2021-07-09 17:42:41,334 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 603 transitions. Word has length 20 [2021-07-09 17:42:41,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:41,334 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 603 transitions. [2021-07-09 17:42:41,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:41,334 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 603 transitions. [2021-07-09 17:42:41,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:41,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:41,334 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:41,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 873 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4056 [2021-07-09 17:42:41,535 INFO L430 AbstractCegarLoop]: === Iteration 879 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:41,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:41,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1397126166, now seen corresponding path program 873 times [2021-07-09 17:42:41,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:41,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433788675] [2021-07-09 17:42:41,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:41,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:41,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433788675] [2021-07-09 17:42:41,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433788675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:41,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945576064] [2021-07-09 17:42:41,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 874 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 874 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:41,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:42:41,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:41,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:41,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:41,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:41,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:41,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:41,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:41,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:41,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:41,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:42,003 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-07-09 17:42:42,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:42,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:42,006 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:42,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:42,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:42,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:42,031 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:42,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:42,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:42,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:42,055 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:42,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:42,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:42,076 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:42,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945576064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:42,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:42,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:42:42,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765523186] [2021-07-09 17:42:42,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:42:42,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:42,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:42:42,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:42:42,156 INFO L87 Difference]: Start difference. First operand 276 states and 603 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:43,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:43,027 INFO L93 Difference]: Finished difference Result 400 states and 827 transitions. [2021-07-09 17:42:43,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:42:43,027 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:43,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:43,027 INFO L225 Difference]: With dead ends: 400 [2021-07-09 17:42:43,027 INFO L226 Difference]: Without dead ends: 367 [2021-07-09 17:42:43,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 958.3ms TimeCoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:42:43,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-07-09 17:42:43,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 275. [2021-07-09 17:42:43,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:43,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-07-09 17:42:43,030 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-07-09 17:42:43,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:43,030 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-07-09 17:42:43,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:43,030 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-07-09 17:42:43,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:43,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:43,031 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:43,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4061,874 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:43,231 INFO L430 AbstractCegarLoop]: === Iteration 880 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:43,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:43,231 INFO L82 PathProgramCache]: Analyzing trace with hash 2012042850, now seen corresponding path program 874 times [2021-07-09 17:42:43,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:43,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197089202] [2021-07-09 17:42:43,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:43,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:43,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197089202] [2021-07-09 17:42:43,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197089202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:43,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594703362] [2021-07-09 17:42:43,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 875 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 875 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:43,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:43,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:43,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:43,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:43,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:43,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:43,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:43,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:43,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:43,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:43,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:43,702 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:42:43,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:43,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:43,706 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:43,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:43,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:43,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:43,732 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:43,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:43,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:43,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:43,756 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:43,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:43,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:43,781 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:43,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594703362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:43,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:43,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:42:43,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354262465] [2021-07-09 17:42:43,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:42:43,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:43,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:42:43,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:42:43,863 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:44,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:44,574 INFO L93 Difference]: Finished difference Result 361 states and 760 transitions. [2021-07-09 17:42:44,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:42:44,575 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:44,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:44,575 INFO L225 Difference]: With dead ends: 361 [2021-07-09 17:42:44,575 INFO L226 Difference]: Without dead ends: 342 [2021-07-09 17:42:44,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 702.9ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:42:44,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-07-09 17:42:44,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 274. [2021-07-09 17:42:44,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:44,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-07-09 17:42:44,578 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-07-09 17:42:44,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:44,578 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-07-09 17:42:44,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:44,578 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-07-09 17:42:44,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:44,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:44,578 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:44,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 875 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4066 [2021-07-09 17:42:44,779 INFO L430 AbstractCegarLoop]: === Iteration 881 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:44,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:44,779 INFO L82 PathProgramCache]: Analyzing trace with hash 871020970, now seen corresponding path program 875 times [2021-07-09 17:42:44,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:44,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191856806] [2021-07-09 17:42:44,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:44,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:44,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191856806] [2021-07-09 17:42:44,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191856806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:44,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530556053] [2021-07-09 17:42:44,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 876 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 876 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:44,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:42:44,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:44,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:44,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:45,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:45,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:45,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:42:45,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:45,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:45,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:42:45,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:45,152 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-07-09 17:42:45,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:45,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:45,154 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:45,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:45,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:42:45,162 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:42:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:45,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530556053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:45,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:45,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:42:45,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527902451] [2021-07-09 17:42:45,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:42:45,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:45,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:42:45,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:42:45,198 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:45,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:45,731 INFO L93 Difference]: Finished difference Result 315 states and 675 transitions. [2021-07-09 17:42:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:42:45,731 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:45,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:45,731 INFO L225 Difference]: With dead ends: 315 [2021-07-09 17:42:45,731 INFO L226 Difference]: Without dead ends: 302 [2021-07-09 17:42:45,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 517.4ms TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:42:45,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-07-09 17:42:45,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 279. [2021-07-09 17:42:45,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.1906474820143886) internal successors, (609), 278 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:45,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 609 transitions. [2021-07-09 17:42:45,734 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 609 transitions. Word has length 20 [2021-07-09 17:42:45,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:45,734 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 609 transitions. [2021-07-09 17:42:45,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:45,734 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 609 transitions. [2021-07-09 17:42:45,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:45,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:45,734 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:45,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4071,876 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:45,935 INFO L430 AbstractCegarLoop]: === Iteration 882 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:45,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:45,935 INFO L82 PathProgramCache]: Analyzing trace with hash 2007206242, now seen corresponding path program 876 times [2021-07-09 17:42:45,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:45,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166221682] [2021-07-09 17:42:45,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:46,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:46,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166221682] [2021-07-09 17:42:46,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166221682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:46,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643809163] [2021-07-09 17:42:46,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 877 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 877 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:46,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:42:46,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:46,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:46,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:46,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:46,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:46,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:46,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:46,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:46,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:46,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:46,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:46,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:46,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:46,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:46,289 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:46,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:46,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:46,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:46,345 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-07-09 17:42:46,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:46,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:46,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:46,349 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:46,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:46,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:46,352 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:46,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:46,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:46,375 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:46,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643809163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:46,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:46,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:42:46,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648606476] [2021-07-09 17:42:46,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:42:46,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:46,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:42:46,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:42:46,468 INFO L87 Difference]: Start difference. First operand 279 states and 609 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:47,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:47,198 INFO L93 Difference]: Finished difference Result 342 states and 715 transitions. [2021-07-09 17:42:47,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:42:47,198 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:47,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:47,198 INFO L225 Difference]: With dead ends: 342 [2021-07-09 17:42:47,198 INFO L226 Difference]: Without dead ends: 320 [2021-07-09 17:42:47,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 746.7ms TimeCoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:42:47,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-07-09 17:42:47,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 276. [2021-07-09 17:42:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.192727272727273) internal successors, (603), 275 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:47,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 603 transitions. [2021-07-09 17:42:47,201 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 603 transitions. Word has length 20 [2021-07-09 17:42:47,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:47,201 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 603 transitions. [2021-07-09 17:42:47,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:47,201 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 603 transitions. [2021-07-09 17:42:47,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:47,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:47,201 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:47,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4072,877 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:47,402 INFO L430 AbstractCegarLoop]: === Iteration 883 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:47,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:47,402 INFO L82 PathProgramCache]: Analyzing trace with hash -138964518, now seen corresponding path program 877 times [2021-07-09 17:42:47,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:47,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485423277] [2021-07-09 17:42:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:47,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:47,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485423277] [2021-07-09 17:42:47,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485423277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:47,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470152597] [2021-07-09 17:42:47,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 878 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 878 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:47,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:47,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:47,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:47,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:47,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:47,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:47,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:47,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:47,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:47,828 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:42:47,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:47,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:47,831 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:47,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:47,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:47,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:47,861 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:47,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:47,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:47,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:47,885 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:47,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:47,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:47,906 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:47,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470152597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:47,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:47,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:42:47,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056508351] [2021-07-09 17:42:47,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:42:47,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:47,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:42:47,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:42:47,984 INFO L87 Difference]: Start difference. First operand 276 states and 603 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:48,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:48,797 INFO L93 Difference]: Finished difference Result 350 states and 738 transitions. [2021-07-09 17:42:48,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:42:48,797 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:48,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:48,798 INFO L225 Difference]: With dead ends: 350 [2021-07-09 17:42:48,798 INFO L226 Difference]: Without dead ends: 331 [2021-07-09 17:42:48,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 841.4ms TimeCoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:42:48,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-07-09 17:42:48,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 275. [2021-07-09 17:42:48,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-07-09 17:42:48,800 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-07-09 17:42:48,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:48,800 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-07-09 17:42:48,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:48,800 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-07-09 17:42:48,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:48,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:48,801 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:49,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 878 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4075 [2021-07-09 17:42:49,001 INFO L430 AbstractCegarLoop]: === Iteration 884 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:49,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:49,001 INFO L82 PathProgramCache]: Analyzing trace with hash 2049218658, now seen corresponding path program 878 times [2021-07-09 17:42:49,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:49,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908340093] [2021-07-09 17:42:49,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:49,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:49,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908340093] [2021-07-09 17:42:49,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908340093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:49,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731722878] [2021-07-09 17:42:49,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 879 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 879 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:49,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:49,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:49,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:49,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:49,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:49,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:49,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:49,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:49,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:49,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:49,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:49,469 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-07-09 17:42:49,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:49,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:49,473 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:49,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:49,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:49,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:49,498 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:49,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:49,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:49,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:49,526 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:49,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:49,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:49,548 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:49,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731722878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:49,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:49,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:42:49,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267220429] [2021-07-09 17:42:49,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:42:49,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:49,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:42:49,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:42:49,629 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:50,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:50,589 INFO L93 Difference]: Finished difference Result 400 states and 827 transitions. [2021-07-09 17:42:50,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:42:50,589 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:50,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:50,590 INFO L225 Difference]: With dead ends: 400 [2021-07-09 17:42:50,590 INFO L226 Difference]: Without dead ends: 367 [2021-07-09 17:42:50,590 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 978.7ms TimeCoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:42:50,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-07-09 17:42:50,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 274. [2021-07-09 17:42:50,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-07-09 17:42:50,593 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-07-09 17:42:50,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:50,593 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-07-09 17:42:50,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-07-09 17:42:50,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:50,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:50,593 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:50,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4080,879 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:50,794 INFO L430 AbstractCegarLoop]: === Iteration 885 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:50,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:50,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1163420378, now seen corresponding path program 879 times [2021-07-09 17:42:50,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:50,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089244256] [2021-07-09 17:42:50,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:51,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:51,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089244256] [2021-07-09 17:42:51,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089244256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:51,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716818927] [2021-07-09 17:42:51,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 880 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 880 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:51,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:42:51,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:51,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:42:51,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:51,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:51,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:51,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:51,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:51,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:51,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:51,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:51,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:51,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:51,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:51,280 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:51,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:51,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:51,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:51,302 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:51,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:51,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:51,320 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:42:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:51,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716818927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:51,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:51,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-09 17:42:51,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870462096] [2021-07-09 17:42:51,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:42:51,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:51,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:42:51,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:42:51,411 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:51,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:51,825 INFO L93 Difference]: Finished difference Result 316 states and 674 transitions. [2021-07-09 17:42:51,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:42:51,826 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:51,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:51,826 INFO L225 Difference]: With dead ends: 316 [2021-07-09 17:42:51,826 INFO L226 Difference]: Without dead ends: 302 [2021-07-09 17:42:51,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 548.2ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:42:51,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-07-09 17:42:51,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 275. [2021-07-09 17:42:51,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.197080291970803) internal successors, (602), 274 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:51,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 602 transitions. [2021-07-09 17:42:51,829 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 602 transitions. Word has length 20 [2021-07-09 17:42:51,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:51,829 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 602 transitions. [2021-07-09 17:42:51,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:51,829 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 602 transitions. [2021-07-09 17:42:51,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:51,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:51,829 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:52,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4085,880 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:52,030 INFO L430 AbstractCegarLoop]: === Iteration 886 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:52,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:52,030 INFO L82 PathProgramCache]: Analyzing trace with hash -526522526, now seen corresponding path program 880 times [2021-07-09 17:42:52,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:52,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149149445] [2021-07-09 17:42:52,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:52,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:52,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149149445] [2021-07-09 17:42:52,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149149445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:52,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885147851] [2021-07-09 17:42:52,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 881 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 881 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:52,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:52,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:52,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:52,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:52,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:52,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:52,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:52,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:52,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:52,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:52,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:52,588 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:42:52,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:52,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:52,592 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:52,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:52,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:52,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:52,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:52,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:52,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:52,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:52,643 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:52,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:52,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:52,664 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:52,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885147851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:52,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:52,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:42:52,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055950] [2021-07-09 17:42:52,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:42:52,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:52,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:42:52,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:42:52,744 INFO L87 Difference]: Start difference. First operand 275 states and 602 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:53,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:53,216 INFO L93 Difference]: Finished difference Result 340 states and 719 transitions. [2021-07-09 17:42:53,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:42:53,216 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:53,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:53,217 INFO L225 Difference]: With dead ends: 340 [2021-07-09 17:42:53,217 INFO L226 Difference]: Without dead ends: 321 [2021-07-09 17:42:53,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 593.6ms TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:42:53,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-09 17:42:53,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 275. [2021-07-09 17:42:53,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.197080291970803) internal successors, (602), 274 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:53,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 602 transitions. [2021-07-09 17:42:53,219 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 602 transitions. Word has length 20 [2021-07-09 17:42:53,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:53,219 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 602 transitions. [2021-07-09 17:42:53,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:53,219 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 602 transitions. [2021-07-09 17:42:53,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:53,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:53,220 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:53,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 881 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4092 [2021-07-09 17:42:53,420 INFO L430 AbstractCegarLoop]: === Iteration 887 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:53,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:53,420 INFO L82 PathProgramCache]: Analyzing trace with hash 64781686, now seen corresponding path program 881 times [2021-07-09 17:42:53,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:53,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072637206] [2021-07-09 17:42:53,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:53,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:53,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072637206] [2021-07-09 17:42:53,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072637206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:53,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583381127] [2021-07-09 17:42:53,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 882 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 882 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:53,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:42:53,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:53,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:53,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:53,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:53,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:53,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:42:53,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:53,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:53,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:42:53,756 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:53,778 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-07-09 17:42:53,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:53,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 17:42:53,780 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:53,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:53,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:42:53,787 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-07-09 17:42:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:53,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583381127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:53,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:53,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-07-09 17:42:53,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878686284] [2021-07-09 17:42:53,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:42:53,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:53,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:42:53,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:42:53,824 INFO L87 Difference]: Start difference. First operand 275 states and 602 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:54,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:54,387 INFO L93 Difference]: Finished difference Result 313 states and 670 transitions. [2021-07-09 17:42:54,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:42:54,387 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:54,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:54,387 INFO L225 Difference]: With dead ends: 313 [2021-07-09 17:42:54,387 INFO L226 Difference]: Without dead ends: 300 [2021-07-09 17:42:54,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 512.5ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:42:54,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-09 17:42:54,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 276. [2021-07-09 17:42:54,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.1963636363636363) internal successors, (604), 275 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:54,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 604 transitions. [2021-07-09 17:42:54,390 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 604 transitions. Word has length 20 [2021-07-09 17:42:54,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:54,390 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 604 transitions. [2021-07-09 17:42:54,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:54,390 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 604 transitions. [2021-07-09 17:42:54,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:54,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:54,390 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:54,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4097,882 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:54,591 INFO L430 AbstractCegarLoop]: === Iteration 888 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:54,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:54,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1200966958, now seen corresponding path program 882 times [2021-07-09 17:42:54,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:54,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042816244] [2021-07-09 17:42:54,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:54,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:54,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042816244] [2021-07-09 17:42:54,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042816244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:54,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772276383] [2021-07-09 17:42:54,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 883 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 883 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:54,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:42:54,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:54,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:54,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:54,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:54,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:54,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:54,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:54,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:54,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:54,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:54,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:54,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:54,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:54,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:54,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:54,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:54,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:54,940 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:54,991 INFO L628 ElimStorePlain]: treesize reduction 83, result has 44.7 percent of original size [2021-07-09 17:42:54,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:54,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:54,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:54,995 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:54,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:54,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:54,999 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:55,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:55,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:55,024 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:55,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772276383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:55,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:55,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:42:55,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339077364] [2021-07-09 17:42:55,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:42:55,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:55,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:42:55,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:42:55,106 INFO L87 Difference]: Start difference. First operand 276 states and 604 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:55,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:55,945 INFO L93 Difference]: Finished difference Result 337 states and 708 transitions. [2021-07-09 17:42:55,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:42:55,945 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:55,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:55,946 INFO L225 Difference]: With dead ends: 337 [2021-07-09 17:42:55,946 INFO L226 Difference]: Without dead ends: 318 [2021-07-09 17:42:55,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 798.5ms TimeCoverageRelationStatistics Valid=126, Invalid=1206, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:42:55,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-07-09 17:42:55,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 275. [2021-07-09 17:42:55,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.197080291970803) internal successors, (602), 274 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 602 transitions. [2021-07-09 17:42:55,948 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 602 transitions. Word has length 20 [2021-07-09 17:42:55,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:55,948 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 602 transitions. [2021-07-09 17:42:55,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:55,948 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 602 transitions. [2021-07-09 17:42:55,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:55,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:55,949 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:56,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 883 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4098 [2021-07-09 17:42:56,149 INFO L430 AbstractCegarLoop]: === Iteration 889 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:56,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:56,149 INFO L82 PathProgramCache]: Analyzing trace with hash -945203802, now seen corresponding path program 883 times [2021-07-09 17:42:56,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:56,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539919557] [2021-07-09 17:42:56,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:56,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:56,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539919557] [2021-07-09 17:42:56,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539919557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:56,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047477636] [2021-07-09 17:42:56,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 884 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 884 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:56,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:56,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:56,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:56,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:56,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:56,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:56,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:56,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:56,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:56,553 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:42:56,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:56,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:56,557 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:56,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:56,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:56,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:56,582 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:56,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:56,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:56,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:56,606 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:56,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:56,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:56,626 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:56,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047477636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:56,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:56,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:42:56,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309322156] [2021-07-09 17:42:56,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:42:56,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:56,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:42:56,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:42:56,708 INFO L87 Difference]: Start difference. First operand 275 states and 602 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:57,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:57,624 INFO L93 Difference]: Finished difference Result 367 states and 763 transitions. [2021-07-09 17:42:57,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:42:57,625 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:57,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:57,625 INFO L225 Difference]: With dead ends: 367 [2021-07-09 17:42:57,625 INFO L226 Difference]: Without dead ends: 341 [2021-07-09 17:42:57,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 903.9ms TimeCoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:42:57,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-07-09 17:42:57,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 277. [2021-07-09 17:42:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1956521739130435) internal successors, (606), 276 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:57,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 606 transitions. [2021-07-09 17:42:57,628 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 606 transitions. Word has length 20 [2021-07-09 17:42:57,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:57,628 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 606 transitions. [2021-07-09 17:42:57,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:57,628 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 606 transitions. [2021-07-09 17:42:57,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:57,629 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:57,629 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:57,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4101,884 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:57,829 INFO L430 AbstractCegarLoop]: === Iteration 890 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:57,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:57,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1242979374, now seen corresponding path program 884 times [2021-07-09 17:42:57,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:57,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236603963] [2021-07-09 17:42:57,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:58,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:58,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:58,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236603963] [2021-07-09 17:42:58,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236603963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:58,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122579879] [2021-07-09 17:42:58,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 885 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 885 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:58,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:58,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:58,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:42:58,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:58,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:58,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:58,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:58,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:58,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:58,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:58,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:58,275 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-07-09 17:42:58,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:58,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:42:58,278 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:58,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:58,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:58,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:42:58,302 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:58,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:58,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:58,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:42:58,326 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:42:58,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:58,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:58,347 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:42:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:58,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122579879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:58,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:58,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:42:58,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323418346] [2021-07-09 17:42:58,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:42:58,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:58,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:42:58,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:42:58,434 INFO L87 Difference]: Start difference. First operand 277 states and 606 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:59,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:59,504 INFO L93 Difference]: Finished difference Result 405 states and 837 transitions. [2021-07-09 17:42:59,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:42:59,504 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:42:59,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:59,504 INFO L225 Difference]: With dead ends: 405 [2021-07-09 17:42:59,504 INFO L226 Difference]: Without dead ends: 372 [2021-07-09 17:42:59,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1041.0ms TimeCoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:42:59,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-07-09 17:42:59,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 277. [2021-07-09 17:42:59,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1956521739130435) internal successors, (606), 276 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:59,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 606 transitions. [2021-07-09 17:42:59,507 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 606 transitions. Word has length 20 [2021-07-09 17:42:59,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:59,507 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 606 transitions. [2021-07-09 17:42:59,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:59,507 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 606 transitions. [2021-07-09 17:42:59,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:42:59,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:59,508 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:59,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4106,885 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:59,708 INFO L430 AbstractCegarLoop]: === Iteration 891 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:59,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:59,708 INFO L82 PathProgramCache]: Analyzing trace with hash 357181094, now seen corresponding path program 885 times [2021-07-09 17:42:59,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:59,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850607294] [2021-07-09 17:42:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:59,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:59,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850607294] [2021-07-09 17:42:59,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850607294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:59,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037507742] [2021-07-09 17:42:59,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 886 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 886 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:59,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:42:59,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:59,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:42:59,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:00,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:00,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:43:00,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:00,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:00,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:00,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:43:00,162 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:43:00,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:00,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:00,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:43:00,186 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:00,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:00,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:00,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:43:00,209 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:43:00,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:00,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:00,227 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-07-09 17:43:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:00,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037507742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:00,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:00,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:43:00,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956141054] [2021-07-09 17:43:00,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:43:00,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:00,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:43:00,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:43:00,320 INFO L87 Difference]: Start difference. First operand 277 states and 606 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:00,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:00,760 INFO L93 Difference]: Finished difference Result 338 states and 716 transitions. [2021-07-09 17:43:00,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:43:00,760 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:43:00,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:00,760 INFO L225 Difference]: With dead ends: 338 [2021-07-09 17:43:00,760 INFO L226 Difference]: Without dead ends: 324 [2021-07-09 17:43:00,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 584.4ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:43:00,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-07-09 17:43:00,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 277. [2021-07-09 17:43:00,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1956521739130435) internal successors, (606), 276 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:00,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 606 transitions. [2021-07-09 17:43:00,763 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 606 transitions. Word has length 20 [2021-07-09 17:43:00,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:00,763 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 606 transitions. [2021-07-09 17:43:00,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:00,763 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 606 transitions. [2021-07-09 17:43:00,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:00,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:00,763 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:00,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 886 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4111 [2021-07-09 17:43:00,964 INFO L430 AbstractCegarLoop]: === Iteration 892 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:00,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:00,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1332761810, now seen corresponding path program 886 times [2021-07-09 17:43:00,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:00,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413930557] [2021-07-09 17:43:00,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:01,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:01,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413930557] [2021-07-09 17:43:01,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413930557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:01,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133591844] [2021-07-09 17:43:01,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 887 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 887 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:01,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:01,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:01,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:43:01,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:01,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:01,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:01,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:43:01,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:01,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:01,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:43:01,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:01,493 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-07-09 17:43:01,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:01,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:43:01,497 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:43:01,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:01,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:01,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:43:01,527 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:01,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:01,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:01,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:43:01,551 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:43:01,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:01,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:01,572 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:43:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:01,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133591844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:01,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:01,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:43:01,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285739468] [2021-07-09 17:43:01,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:43:01,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:01,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:43:01,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:43:01,656 INFO L87 Difference]: Start difference. First operand 277 states and 606 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:02,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:02,782 INFO L93 Difference]: Finished difference Result 428 states and 871 transitions. [2021-07-09 17:43:02,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:43:02,782 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:43:02,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:02,783 INFO L225 Difference]: With dead ends: 428 [2021-07-09 17:43:02,783 INFO L226 Difference]: Without dead ends: 381 [2021-07-09 17:43:02,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1227.1ms TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:43:02,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-07-09 17:43:02,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 283. [2021-07-09 17:43:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.2127659574468086) internal successors, (624), 282 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 624 transitions. [2021-07-09 17:43:02,786 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 624 transitions. Word has length 20 [2021-07-09 17:43:02,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:02,786 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 624 transitions. [2021-07-09 17:43:02,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:02,786 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 624 transitions. [2021-07-09 17:43:02,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:43:02,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:02,786 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:02,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 887 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4118 [2021-07-09 17:43:02,987 INFO L430 AbstractCegarLoop]: === Iteration 893 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:02,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1689271778, now seen corresponding path program 887 times [2021-07-09 17:43:02,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:02,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365593608] [2021-07-09 17:43:02,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:03,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:03,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365593608] [2021-07-09 17:43:03,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365593608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:03,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488813614] [2021-07-09 17:43:03,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 888 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 888 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:03,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:43:03,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:03,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:43:03,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:03,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:03,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:03,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:43:03,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:03,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:03,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:43:03,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:03,538 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-07-09 17:43:03,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:03,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:43:03,548 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:03,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:03,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:03,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:43:03,578 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:43:03,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:03,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:03,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:43:03,603 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:43:03,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:03,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:03,624 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-07-09 17:43:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:03,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488813614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:03,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:03,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-09 17:43:03,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160293021] [2021-07-09 17:43:03,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:43:03,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:03,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:43:03,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:43:03,707 INFO L87 Difference]: Start difference. First operand 283 states and 624 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:04,178 INFO L93 Difference]: Finished difference Result 358 states and 765 transitions. [2021-07-09 17:43:04,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:43:04,178 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:43:04,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:04,179 INFO L225 Difference]: With dead ends: 358 [2021-07-09 17:43:04,179 INFO L226 Difference]: Without dead ends: 346 [2021-07-09 17:43:04,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 623.6ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:43:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-07-09 17:43:04,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 288. [2021-07-09 17:43:04,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.21602787456446) internal successors, (636), 287 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 636 transitions. [2021-07-09 17:43:04,182 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 636 transitions. Word has length 20 [2021-07-09 17:43:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:04,182 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 636 transitions. [2021-07-09 17:43:04,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:04,182 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 636 transitions. [2021-07-09 17:43:04,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:04,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:04,182 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:04,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 888 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4123 [2021-07-09 17:43:04,383 INFO L430 AbstractCegarLoop]: === Iteration 894 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:04,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:04,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1317745914, now seen corresponding path program 888 times [2021-07-09 17:43:04,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:04,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643649086] [2021-07-09 17:43:04,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:04,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:04,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643649086] [2021-07-09 17:43:04,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643649086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:04,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959916365] [2021-07-09 17:43:04,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 889 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 889 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:04,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:43:04,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:04,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:04,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:04,695 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:04,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959916365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:04,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:04,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:43:04,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679539252] [2021-07-09 17:43:04,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:04,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:04,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:04,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:04,696 INFO L87 Difference]: Start difference. First operand 288 states and 636 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:05,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:05,181 INFO L93 Difference]: Finished difference Result 339 states and 721 transitions. [2021-07-09 17:43:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:43:05,182 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:05,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:05,182 INFO L225 Difference]: With dead ends: 339 [2021-07-09 17:43:05,182 INFO L226 Difference]: Without dead ends: 319 [2021-07-09 17:43:05,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 555.5ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:43:05,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-07-09 17:43:05,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 283. [2021-07-09 17:43:05,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.219858156028369) internal successors, (626), 282 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:05,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 626 transitions. [2021-07-09 17:43:05,185 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 626 transitions. Word has length 21 [2021-07-09 17:43:05,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:05,185 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 626 transitions. [2021-07-09 17:43:05,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:05,185 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 626 transitions. [2021-07-09 17:43:05,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:05,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:05,185 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:05,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4128,889 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:05,386 INFO L430 AbstractCegarLoop]: === Iteration 895 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:05,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:05,386 INFO L82 PathProgramCache]: Analyzing trace with hash 799042326, now seen corresponding path program 889 times [2021-07-09 17:43:05,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:05,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831587493] [2021-07-09 17:43:05,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:05,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:05,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831587493] [2021-07-09 17:43:05,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831587493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:05,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307609091] [2021-07-09 17:43:05,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 890 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 890 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:05,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:05,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:05,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307609091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:05,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:05,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-07-09 17:43:05,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708735088] [2021-07-09 17:43:05,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:43:05,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:05,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:43:05,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:43:05,614 INFO L87 Difference]: Start difference. First operand 283 states and 626 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:05,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:05,773 INFO L93 Difference]: Finished difference Result 339 states and 729 transitions. [2021-07-09 17:43:05,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:43:05,773 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:05,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:05,774 INFO L225 Difference]: With dead ends: 339 [2021-07-09 17:43:05,774 INFO L226 Difference]: Without dead ends: 339 [2021-07-09 17:43:05,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:05,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-09 17:43:05,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 284. [2021-07-09 17:43:05,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.222614840989399) internal successors, (629), 283 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:05,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 629 transitions. [2021-07-09 17:43:05,776 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 629 transitions. Word has length 21 [2021-07-09 17:43:05,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:05,776 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 629 transitions. [2021-07-09 17:43:05,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:05,776 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 629 transitions. [2021-07-09 17:43:05,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:05,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:05,777 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:05,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 890 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4134 [2021-07-09 17:43:05,977 INFO L430 AbstractCegarLoop]: === Iteration 896 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:05,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:05,977 INFO L82 PathProgramCache]: Analyzing trace with hash 951908934, now seen corresponding path program 890 times [2021-07-09 17:43:05,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:05,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089383068] [2021-07-09 17:43:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:06,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:06,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089383068] [2021-07-09 17:43:06,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089383068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:06,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616055831] [2021-07-09 17:43:06,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 891 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 891 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:06,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:06,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:06,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:43:06,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:06,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:06,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:06,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:06,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:06,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:06,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:06,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:06,281 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-07-09 17:43:06,281 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:06,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:43:06,282 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:43:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:06,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616055831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:06,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:06,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:06,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097426862] [2021-07-09 17:43:06,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:06,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:06,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:06,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:06,301 INFO L87 Difference]: Start difference. First operand 284 states and 629 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:06,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:06,665 INFO L93 Difference]: Finished difference Result 363 states and 777 transitions. [2021-07-09 17:43:06,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:43:06,665 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:06,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:06,665 INFO L225 Difference]: With dead ends: 363 [2021-07-09 17:43:06,665 INFO L226 Difference]: Without dead ends: 363 [2021-07-09 17:43:06,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 305.2ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:43:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-07-09 17:43:06,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 284. [2021-07-09 17:43:06,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.222614840989399) internal successors, (629), 283 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 629 transitions. [2021-07-09 17:43:06,669 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 629 transitions. Word has length 21 [2021-07-09 17:43:06,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:06,669 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 629 transitions. [2021-07-09 17:43:06,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:06,669 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 629 transitions. [2021-07-09 17:43:06,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:06,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:06,669 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:06,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4137,891 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:06,881 INFO L430 AbstractCegarLoop]: === Iteration 897 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:06,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:06,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1279855594, now seen corresponding path program 891 times [2021-07-09 17:43:06,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:06,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653392963] [2021-07-09 17:43:06,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:06,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:06,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653392963] [2021-07-09 17:43:06,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653392963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:06,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692078760] [2021-07-09 17:43:06,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 892 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 892 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:07,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:43:07,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:07,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:07,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:07,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692078760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:07,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:07,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:43:07,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369156648] [2021-07-09 17:43:07,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:07,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:07,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:07,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:07,236 INFO L87 Difference]: Start difference. First operand 284 states and 629 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:07,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:07,621 INFO L93 Difference]: Finished difference Result 359 states and 769 transitions. [2021-07-09 17:43:07,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:43:07,637 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:07,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:07,637 INFO L225 Difference]: With dead ends: 359 [2021-07-09 17:43:07,637 INFO L226 Difference]: Without dead ends: 359 [2021-07-09 17:43:07,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 350.8ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:43:07,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-09 17:43:07,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 284. [2021-07-09 17:43:07,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.222614840989399) internal successors, (629), 283 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:07,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 629 transitions. [2021-07-09 17:43:07,640 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 629 transitions. Word has length 21 [2021-07-09 17:43:07,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:07,640 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 629 transitions. [2021-07-09 17:43:07,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:07,640 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 629 transitions. [2021-07-09 17:43:07,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:07,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:07,640 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:07,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4139,892 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:07,856 INFO L430 AbstractCegarLoop]: === Iteration 898 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:07,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:07,856 INFO L82 PathProgramCache]: Analyzing trace with hash -763524718, now seen corresponding path program 892 times [2021-07-09 17:43:07,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:07,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911237772] [2021-07-09 17:43:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:08,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:08,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911237772] [2021-07-09 17:43:08,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911237772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:08,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900516870] [2021-07-09 17:43:08,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 893 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 893 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:08,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:08,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:08,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:08,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:08,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900516870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:08,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:08,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:43:08,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005195836] [2021-07-09 17:43:08,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:08,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:08,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:08,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:08,264 INFO L87 Difference]: Start difference. First operand 284 states and 629 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:08,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:08,888 INFO L93 Difference]: Finished difference Result 332 states and 709 transitions. [2021-07-09 17:43:08,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:43:08,889 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:08,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:08,889 INFO L225 Difference]: With dead ends: 332 [2021-07-09 17:43:08,889 INFO L226 Difference]: Without dead ends: 323 [2021-07-09 17:43:08,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 679.6ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:43:08,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-07-09 17:43:08,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 284. [2021-07-09 17:43:08,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2190812720848054) internal successors, (628), 283 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:08,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 628 transitions. [2021-07-09 17:43:08,892 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 628 transitions. Word has length 21 [2021-07-09 17:43:08,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:08,892 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 628 transitions. [2021-07-09 17:43:08,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:08,892 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 628 transitions. [2021-07-09 17:43:08,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:08,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:08,892 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:09,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 893 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4143 [2021-07-09 17:43:09,092 INFO L430 AbstractCegarLoop]: === Iteration 899 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:09,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:09,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1213300666, now seen corresponding path program 893 times [2021-07-09 17:43:09,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:09,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041668946] [2021-07-09 17:43:09,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:09,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:09,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041668946] [2021-07-09 17:43:09,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041668946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:09,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918752972] [2021-07-09 17:43:09,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 894 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 894 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:09,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:43:09,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:09,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:43:09,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:09,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:09,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:09,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:09,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:09,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:09,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:09,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:09,433 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-07-09 17:43:09,433 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:09,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:43:09,434 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:43:09,451 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:09,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918752972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:09,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:09,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:09,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881338793] [2021-07-09 17:43:09,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:09,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:09,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:09,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:09,452 INFO L87 Difference]: Start difference. First operand 284 states and 628 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:09,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:09,762 INFO L93 Difference]: Finished difference Result 355 states and 760 transitions. [2021-07-09 17:43:09,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:43:09,762 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:09,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:09,762 INFO L225 Difference]: With dead ends: 355 [2021-07-09 17:43:09,763 INFO L226 Difference]: Without dead ends: 355 [2021-07-09 17:43:09,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 338.3ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:43:09,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-07-09 17:43:09,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 284. [2021-07-09 17:43:09,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2190812720848054) internal successors, (628), 283 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:09,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 628 transitions. [2021-07-09 17:43:09,765 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 628 transitions. Word has length 21 [2021-07-09 17:43:09,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:09,766 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 628 transitions. [2021-07-09 17:43:09,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:09,766 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 628 transitions. [2021-07-09 17:43:09,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:09,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:09,766 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:09,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4149,894 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:09,966 INFO L430 AbstractCegarLoop]: === Iteration 900 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:09,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:09,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1836887574, now seen corresponding path program 894 times [2021-07-09 17:43:09,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:09,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91044884] [2021-07-09 17:43:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:10,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:10,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91044884] [2021-07-09 17:43:10,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91044884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:10,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87008248] [2021-07-09 17:43:10,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 895 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 895 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:10,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:43:10,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:10,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:10,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:10,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87008248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:10,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:10,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:43:10,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744333421] [2021-07-09 17:43:10,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:10,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:10,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:10,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:10,315 INFO L87 Difference]: Start difference. First operand 284 states and 628 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:10,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:10,634 INFO L93 Difference]: Finished difference Result 351 states and 752 transitions. [2021-07-09 17:43:10,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:43:10,634 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:10,634 INFO L225 Difference]: With dead ends: 351 [2021-07-09 17:43:10,635 INFO L226 Difference]: Without dead ends: 351 [2021-07-09 17:43:10,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 336.0ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:43:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-07-09 17:43:10,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 284. [2021-07-09 17:43:10,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2190812720848054) internal successors, (628), 283 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:10,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 628 transitions. [2021-07-09 17:43:10,637 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 628 transitions. Word has length 21 [2021-07-09 17:43:10,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:10,637 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 628 transitions. [2021-07-09 17:43:10,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:10,637 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 628 transitions. [2021-07-09 17:43:10,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:10,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:10,638 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:10,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 895 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4151 [2021-07-09 17:43:10,838 INFO L430 AbstractCegarLoop]: === Iteration 901 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:10,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:10,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1050833554, now seen corresponding path program 895 times [2021-07-09 17:43:10,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:10,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680315333] [2021-07-09 17:43:10,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:10,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:10,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680315333] [2021-07-09 17:43:10,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680315333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:10,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286163923] [2021-07-09 17:43:10,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 896 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 896 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:11,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:11,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:11,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:11,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:11,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:43:11,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:11,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:11,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:43:11,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:11,268 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:43:11,268 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:11,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:43:11,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:11,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:11,282 INFO L518 ElimStorePlain]: Eliminatee v_prenex_775 vanished before elimination [2021-07-09 17:43:11,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:11,283 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:43:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:11,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286163923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:11,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:11,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:43:11,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542251080] [2021-07-09 17:43:11,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:11,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:11,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:11,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:11,313 INFO L87 Difference]: Start difference. First operand 284 states and 628 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:12,154 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-07-09 17:43:12,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:12,321 INFO L93 Difference]: Finished difference Result 342 states and 725 transitions. [2021-07-09 17:43:12,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:43:12,322 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:12,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:12,322 INFO L225 Difference]: With dead ends: 342 [2021-07-09 17:43:12,322 INFO L226 Difference]: Without dead ends: 339 [2021-07-09 17:43:12,322 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1051.7ms TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:43:12,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-09 17:43:12,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 289. [2021-07-09 17:43:12,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.21875) internal successors, (639), 288 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:12,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 639 transitions. [2021-07-09 17:43:12,325 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 639 transitions. Word has length 21 [2021-07-09 17:43:12,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:12,325 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 639 transitions. [2021-07-09 17:43:12,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:12,325 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 639 transitions. [2021-07-09 17:43:12,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:12,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:12,325 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:12,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 896 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4155 [2021-07-09 17:43:12,526 INFO L430 AbstractCegarLoop]: === Iteration 902 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:12,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:12,526 INFO L82 PathProgramCache]: Analyzing trace with hash 826902086, now seen corresponding path program 896 times [2021-07-09 17:43:12,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:12,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117882739] [2021-07-09 17:43:12,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:12,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:12,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117882739] [2021-07-09 17:43:12,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117882739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:12,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580680698] [2021-07-09 17:43:12,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 897 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 897 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:12,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:12,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:12,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:43:12,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:12,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:12,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:12,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:43:12,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:12,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:12,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:43:12,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:12,880 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-07-09 17:43:12,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:43:12,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:12,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:12,901 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:12,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:12,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-07-09 17:43:12,904 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:43:12,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:12,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:12,919 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:43:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:12,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580680698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:12,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:12,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:12,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173377558] [2021-07-09 17:43:12,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:12,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:12,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:12,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:12,965 INFO L87 Difference]: Start difference. First operand 289 states and 639 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:13,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:13,360 INFO L93 Difference]: Finished difference Result 352 states and 755 transitions. [2021-07-09 17:43:13,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:43:13,360 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:13,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:13,361 INFO L225 Difference]: With dead ends: 352 [2021-07-09 17:43:13,361 INFO L226 Difference]: Without dead ends: 352 [2021-07-09 17:43:13,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:43:13,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-07-09 17:43:13,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 289. [2021-07-09 17:43:13,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.21875) internal successors, (639), 288 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:13,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 639 transitions. [2021-07-09 17:43:13,364 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 639 transitions. Word has length 21 [2021-07-09 17:43:13,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:13,364 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 639 transitions. [2021-07-09 17:43:13,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:13,364 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 639 transitions. [2021-07-09 17:43:13,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:13,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:13,364 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:13,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 897 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4163 [2021-07-09 17:43:13,565 INFO L430 AbstractCegarLoop]: === Iteration 903 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:13,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:13,565 INFO L82 PathProgramCache]: Analyzing trace with hash -2107948470, now seen corresponding path program 897 times [2021-07-09 17:43:13,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:13,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852807720] [2021-07-09 17:43:13,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:13,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:13,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852807720] [2021-07-09 17:43:13,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852807720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:13,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136591737] [2021-07-09 17:43:13,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 898 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 898 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:13,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:43:13,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:13,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:13,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:13,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:13,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:13,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:43:13,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:13,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:13,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:43:13,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:13,996 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:43:13,997 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:13,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:43:13,999 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:14,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:14,011 INFO L518 ElimStorePlain]: Eliminatee v_prenex_781 vanished before elimination [2021-07-09 17:43:14,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:14,011 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:43:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:14,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136591737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:14,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:14,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:43:14,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311497369] [2021-07-09 17:43:14,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:14,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:14,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:14,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:14,040 INFO L87 Difference]: Start difference. First operand 289 states and 639 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:14,661 INFO L93 Difference]: Finished difference Result 327 states and 704 transitions. [2021-07-09 17:43:14,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:43:14,662 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:14,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:14,662 INFO L225 Difference]: With dead ends: 327 [2021-07-09 17:43:14,662 INFO L226 Difference]: Without dead ends: 327 [2021-07-09 17:43:14,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 677.5ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:43:14,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-09 17:43:14,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 285. [2021-07-09 17:43:14,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.2183098591549295) internal successors, (630), 284 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:14,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 630 transitions. [2021-07-09 17:43:14,665 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 630 transitions. Word has length 21 [2021-07-09 17:43:14,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:14,665 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 630 transitions. [2021-07-09 17:43:14,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:14,665 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 630 transitions. [2021-07-09 17:43:14,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:14,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:14,665 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:14,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 898 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4167 [2021-07-09 17:43:14,869 INFO L430 AbstractCegarLoop]: === Iteration 904 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:14,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:14,869 INFO L82 PathProgramCache]: Analyzing trace with hash 683162506, now seen corresponding path program 898 times [2021-07-09 17:43:14,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:14,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765541162] [2021-07-09 17:43:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:14,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:14,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765541162] [2021-07-09 17:43:14,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765541162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:14,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655436181] [2021-07-09 17:43:14,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 899 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 899 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:14,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:14,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:14,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:14,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:15,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655436181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:15,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:15,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:15,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962196013] [2021-07-09 17:43:15,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:15,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:15,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:15,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:15,150 INFO L87 Difference]: Start difference. First operand 285 states and 630 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:15,324 INFO L93 Difference]: Finished difference Result 314 states and 685 transitions. [2021-07-09 17:43:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:43:15,324 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:15,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:15,324 INFO L225 Difference]: With dead ends: 314 [2021-07-09 17:43:15,324 INFO L226 Difference]: Without dead ends: 314 [2021-07-09 17:43:15,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:15,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-07-09 17:43:15,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 285. [2021-07-09 17:43:15,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.2183098591549295) internal successors, (630), 284 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:15,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 630 transitions. [2021-07-09 17:43:15,327 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 630 transitions. Word has length 21 [2021-07-09 17:43:15,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:15,327 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 630 transitions. [2021-07-09 17:43:15,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:15,327 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 630 transitions. [2021-07-09 17:43:15,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:15,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:15,327 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:15,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4174,899 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:15,528 INFO L430 AbstractCegarLoop]: === Iteration 905 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:15,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:15,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1548602022, now seen corresponding path program 899 times [2021-07-09 17:43:15,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:15,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045475063] [2021-07-09 17:43:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:15,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:15,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045475063] [2021-07-09 17:43:15,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045475063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:15,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459065352] [2021-07-09 17:43:15,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 900 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 900 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:15,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:43:15,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:15,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:15,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:15,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459065352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:15,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:15,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:43:15,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158239939] [2021-07-09 17:43:15,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:15,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:15,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:15,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:15,814 INFO L87 Difference]: Start difference. First operand 285 states and 630 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:16,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:16,006 INFO L93 Difference]: Finished difference Result 335 states and 727 transitions. [2021-07-09 17:43:16,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:43:16,006 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:16,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:16,007 INFO L225 Difference]: With dead ends: 335 [2021-07-09 17:43:16,007 INFO L226 Difference]: Without dead ends: 335 [2021-07-09 17:43:16,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:16,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-07-09 17:43:16,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 286. [2021-07-09 17:43:16,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.2175438596491226) internal successors, (632), 285 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:16,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 632 transitions. [2021-07-09 17:43:16,009 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 632 transitions. Word has length 21 [2021-07-09 17:43:16,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:16,009 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 632 transitions. [2021-07-09 17:43:16,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:16,010 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 632 transitions. [2021-07-09 17:43:16,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:16,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:16,010 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:16,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 900 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4178 [2021-07-09 17:43:16,210 INFO L430 AbstractCegarLoop]: === Iteration 906 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:16,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:16,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1482047094, now seen corresponding path program 900 times [2021-07-09 17:43:16,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:16,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934935574] [2021-07-09 17:43:16,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:16,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:16,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934935574] [2021-07-09 17:43:16,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934935574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:16,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244521784] [2021-07-09 17:43:16,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 901 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 901 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:16,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:43:16,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:16,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:16,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:16,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244521784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:16,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:16,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:43:16,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640844889] [2021-07-09 17:43:16,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:16,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:16,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:16,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:16,521 INFO L87 Difference]: Start difference. First operand 286 states and 632 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:16,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:16,719 INFO L93 Difference]: Finished difference Result 332 states and 721 transitions. [2021-07-09 17:43:16,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:43:16,720 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:16,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:16,720 INFO L225 Difference]: With dead ends: 332 [2021-07-09 17:43:16,720 INFO L226 Difference]: Without dead ends: 332 [2021-07-09 17:43:16,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:16,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-07-09 17:43:16,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 287. [2021-07-09 17:43:16,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.2167832167832167) internal successors, (634), 286 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:16,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 634 transitions. [2021-07-09 17:43:16,723 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 634 transitions. Word has length 21 [2021-07-09 17:43:16,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:16,723 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 634 transitions. [2021-07-09 17:43:16,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:16,723 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 634 transitions. [2021-07-09 17:43:16,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:16,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:16,723 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:16,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4182,901 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:16,924 INFO L430 AbstractCegarLoop]: === Iteration 907 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:16,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:16,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1568141146, now seen corresponding path program 901 times [2021-07-09 17:43:16,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:16,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454037064] [2021-07-09 17:43:16,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:17,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:17,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454037064] [2021-07-09 17:43:17,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454037064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:17,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693991300] [2021-07-09 17:43:17,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 902 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 902 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:17,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:17,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:17,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693991300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:17,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:17,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:43:17,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356958697] [2021-07-09 17:43:17,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:17,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:17,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:17,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:17,236 INFO L87 Difference]: Start difference. First operand 287 states and 634 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:17,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:17,438 INFO L93 Difference]: Finished difference Result 329 states and 715 transitions. [2021-07-09 17:43:17,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:43:17,438 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:17,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:17,438 INFO L225 Difference]: With dead ends: 329 [2021-07-09 17:43:17,438 INFO L226 Difference]: Without dead ends: 329 [2021-07-09 17:43:17,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:17,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-07-09 17:43:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 288. [2021-07-09 17:43:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.21602787456446) internal successors, (636), 287 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 636 transitions. [2021-07-09 17:43:17,441 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 636 transitions. Word has length 21 [2021-07-09 17:43:17,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:17,441 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 636 transitions. [2021-07-09 17:43:17,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:17,441 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 636 transitions. [2021-07-09 17:43:17,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:17,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:17,441 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:17,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 902 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4186 [2021-07-09 17:43:17,642 INFO L430 AbstractCegarLoop]: === Iteration 908 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:17,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:17,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1208224628, now seen corresponding path program 902 times [2021-07-09 17:43:17,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:17,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221425077] [2021-07-09 17:43:17,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:17,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:17,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221425077] [2021-07-09 17:43:17,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221425077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:17,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959208971] [2021-07-09 17:43:17,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 903 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 903 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:17,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:17,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:17,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:43:17,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:17,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:17,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:17,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:43:17,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:17,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:17,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:43:17,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:17,980 INFO L628 ElimStorePlain]: treesize reduction 80, result has 35.0 percent of original size [2021-07-09 17:43:17,981 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:17,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:43:17,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:17,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:17,998 INFO L518 ElimStorePlain]: Eliminatee v_prenex_787 vanished before elimination [2021-07-09 17:43:17,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:17,999 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:43:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:18,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959208971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:18,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:18,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:18,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712182001] [2021-07-09 17:43:18,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:18,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:18,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:18,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:18,043 INFO L87 Difference]: Start difference. First operand 288 states and 636 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:18,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:18,279 INFO L93 Difference]: Finished difference Result 330 states and 717 transitions. [2021-07-09 17:43:18,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:43:18,279 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:18,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:18,280 INFO L225 Difference]: With dead ends: 330 [2021-07-09 17:43:18,280 INFO L226 Difference]: Without dead ends: 330 [2021-07-09 17:43:18,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:18,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-07-09 17:43:18,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 289. [2021-07-09 17:43:18,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.2152777777777777) internal successors, (638), 288 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 638 transitions. [2021-07-09 17:43:18,283 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 638 transitions. Word has length 21 [2021-07-09 17:43:18,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:18,283 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 638 transitions. [2021-07-09 17:43:18,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:18,283 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 638 transitions. [2021-07-09 17:43:18,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:18,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:18,283 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:18,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4190,903 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:18,484 INFO L430 AbstractCegarLoop]: === Iteration 909 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:18,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:18,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1918272398, now seen corresponding path program 903 times [2021-07-09 17:43:18,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:18,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786404418] [2021-07-09 17:43:18,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:18,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:18,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:18,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786404418] [2021-07-09 17:43:18,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786404418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:18,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098360306] [2021-07-09 17:43:18,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 904 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 904 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:18,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:43:18,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:18,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:18,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:18,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:18,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:18,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:43:18,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:18,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:18,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:18,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:18,905 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:43:18,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:43:18,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:18,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:18,919 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:18,919 INFO L518 ElimStorePlain]: Eliminatee v_prenex_790 vanished before elimination [2021-07-09 17:43:18,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:18,920 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:43:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:18,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098360306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:18,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:18,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:43:18,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462602319] [2021-07-09 17:43:18,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:18,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:18,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:18,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:18,950 INFO L87 Difference]: Start difference. First operand 289 states and 638 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:19,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:19,410 INFO L93 Difference]: Finished difference Result 301 states and 659 transitions. [2021-07-09 17:43:19,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:43:19,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:19,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:19,411 INFO L225 Difference]: With dead ends: 301 [2021-07-09 17:43:19,411 INFO L226 Difference]: Without dead ends: 301 [2021-07-09 17:43:19,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 517.7ms TimeCoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:43:19,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-07-09 17:43:19,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 284. [2021-07-09 17:43:19,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2190812720848054) internal successors, (628), 283 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:19,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 628 transitions. [2021-07-09 17:43:19,414 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 628 transitions. Word has length 21 [2021-07-09 17:43:19,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:19,414 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 628 transitions. [2021-07-09 17:43:19,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:19,414 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 628 transitions. [2021-07-09 17:43:19,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:19,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:19,414 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:19,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4194,904 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:19,614 INFO L430 AbstractCegarLoop]: === Iteration 910 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:19,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:19,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1897742802, now seen corresponding path program 904 times [2021-07-09 17:43:19,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:19,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467267060] [2021-07-09 17:43:19,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:19,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:19,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467267060] [2021-07-09 17:43:19,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467267060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:19,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103522577] [2021-07-09 17:43:19,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 905 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 905 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:19,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:19,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:19,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:19,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:19,876 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:19,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103522577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:19,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:19,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:43:19,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734019701] [2021-07-09 17:43:19,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:19,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:19,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:19,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:19,877 INFO L87 Difference]: Start difference. First operand 284 states and 628 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:20,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:20,154 INFO L93 Difference]: Finished difference Result 339 states and 733 transitions. [2021-07-09 17:43:20,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:43:20,155 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:20,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:20,155 INFO L225 Difference]: With dead ends: 339 [2021-07-09 17:43:20,155 INFO L226 Difference]: Without dead ends: 339 [2021-07-09 17:43:20,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 210.3ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:43:20,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-09 17:43:20,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 286. [2021-07-09 17:43:20,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.2175438596491226) internal successors, (632), 285 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:20,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 632 transitions. [2021-07-09 17:43:20,158 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 632 transitions. Word has length 21 [2021-07-09 17:43:20,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:20,158 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 632 transitions. [2021-07-09 17:43:20,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:20,158 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 632 transitions. [2021-07-09 17:43:20,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:20,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:20,158 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:20,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4201,905 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:20,359 INFO L430 AbstractCegarLoop]: === Iteration 911 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:20,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:20,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1964297730, now seen corresponding path program 905 times [2021-07-09 17:43:20,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:20,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292495065] [2021-07-09 17:43:20,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:20,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:20,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292495065] [2021-07-09 17:43:20,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292495065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:20,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189463736] [2021-07-09 17:43:20,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 906 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 906 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:20,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:43:20,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:20,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:20,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:20,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189463736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:20,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:20,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:43:20,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730919465] [2021-07-09 17:43:20,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:20,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:20,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:20,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:20,647 INFO L87 Difference]: Start difference. First operand 286 states and 632 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:21,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:21,172 INFO L93 Difference]: Finished difference Result 364 states and 785 transitions. [2021-07-09 17:43:21,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:43:21,172 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:21,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:21,172 INFO L225 Difference]: With dead ends: 364 [2021-07-09 17:43:21,172 INFO L226 Difference]: Without dead ends: 364 [2021-07-09 17:43:21,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 437.6ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:43:21,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-07-09 17:43:21,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 287. [2021-07-09 17:43:21,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.2167832167832167) internal successors, (634), 286 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:21,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 634 transitions. [2021-07-09 17:43:21,175 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 634 transitions. Word has length 21 [2021-07-09 17:43:21,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:21,175 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 634 transitions. [2021-07-09 17:43:21,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:21,175 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 634 transitions. [2021-07-09 17:43:21,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:21,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:21,176 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:21,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4205,906 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:21,376 INFO L430 AbstractCegarLoop]: === Iteration 912 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:21,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:21,376 INFO L82 PathProgramCache]: Analyzing trace with hash 719518674, now seen corresponding path program 906 times [2021-07-09 17:43:21,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:21,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191736855] [2021-07-09 17:43:21,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:21,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:21,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191736855] [2021-07-09 17:43:21,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191736855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:21,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866105234] [2021-07-09 17:43:21,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 907 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 907 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:21,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:43:21,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:21,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:21,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:21,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866105234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:21,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:21,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:43:21,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182071878] [2021-07-09 17:43:21,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:21,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:21,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:21,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:21,668 INFO L87 Difference]: Start difference. First operand 287 states and 634 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:22,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:22,244 INFO L93 Difference]: Finished difference Result 359 states and 774 transitions. [2021-07-09 17:43:22,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:43:22,244 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:22,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:22,245 INFO L225 Difference]: With dead ends: 359 [2021-07-09 17:43:22,245 INFO L226 Difference]: Without dead ends: 359 [2021-07-09 17:43:22,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 457.5ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:43:22,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-09 17:43:22,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 288. [2021-07-09 17:43:22,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.21602787456446) internal successors, (636), 287 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:22,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 636 transitions. [2021-07-09 17:43:22,248 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 636 transitions. Word has length 21 [2021-07-09 17:43:22,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:22,248 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 636 transitions. [2021-07-09 17:43:22,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:22,248 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 636 transitions. [2021-07-09 17:43:22,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:22,248 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:22,248 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:22,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4209,907 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:22,449 INFO L430 AbstractCegarLoop]: === Iteration 913 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:22,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:22,449 INFO L82 PathProgramCache]: Analyzing trace with hash 359602156, now seen corresponding path program 907 times [2021-07-09 17:43:22,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:22,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71840012] [2021-07-09 17:43:22,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:22,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:22,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71840012] [2021-07-09 17:43:22,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71840012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:22,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691008480] [2021-07-09 17:43:22,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 908 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 908 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:22,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:43:22,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:22,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:22,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:22,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:22,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:22,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:22,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:22,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:22,774 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-07-09 17:43:22,774 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:22,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:22,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:43:22,776 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:22,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:22,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:22,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:43:22,794 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:43:22,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:22,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:22,809 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:43:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:22,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691008480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:22,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:22,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:22,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50441207] [2021-07-09 17:43:22,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:22,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:22,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:22,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:22,853 INFO L87 Difference]: Start difference. First operand 288 states and 636 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:23,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:23,482 INFO L93 Difference]: Finished difference Result 361 states and 777 transitions. [2021-07-09 17:43:23,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:43:23,482 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:23,483 INFO L225 Difference]: With dead ends: 361 [2021-07-09 17:43:23,483 INFO L226 Difference]: Without dead ends: 361 [2021-07-09 17:43:23,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 520.3ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:43:23,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-07-09 17:43:23,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 289. [2021-07-09 17:43:23,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.2152777777777777) internal successors, (638), 288 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:23,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 638 transitions. [2021-07-09 17:43:23,488 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 638 transitions. Word has length 21 [2021-07-09 17:43:23,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:23,488 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 638 transitions. [2021-07-09 17:43:23,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:23,488 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 638 transitions. [2021-07-09 17:43:23,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:23,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:23,488 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:23,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4213,908 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:23,689 INFO L430 AbstractCegarLoop]: === Iteration 914 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:23,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:23,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1069649926, now seen corresponding path program 908 times [2021-07-09 17:43:23,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:23,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584294532] [2021-07-09 17:43:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:23,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:23,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584294532] [2021-07-09 17:43:23,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584294532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:23,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646478853] [2021-07-09 17:43:23,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 909 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 909 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:23,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:23,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:23,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:43:23,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:24,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:24,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:24,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:43:24,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:24,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:24,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:24,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:24,072 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.7 percent of original size [2021-07-09 17:43:24,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:24,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:43:24,075 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:43:24,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:24,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:43:24,093 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:24,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:24,107 INFO L518 ElimStorePlain]: Eliminatee v_prenex_798 vanished before elimination [2021-07-09 17:43:24,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:24,108 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-07-09 17:43:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:24,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646478853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:24,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:24,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:24,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350669575] [2021-07-09 17:43:24,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:24,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:24,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:24,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:24,155 INFO L87 Difference]: Start difference. First operand 289 states and 638 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:24,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:24,530 INFO L93 Difference]: Finished difference Result 310 states and 677 transitions. [2021-07-09 17:43:24,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:43:24,530 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:24,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:24,531 INFO L225 Difference]: With dead ends: 310 [2021-07-09 17:43:24,531 INFO L226 Difference]: Without dead ends: 310 [2021-07-09 17:43:24,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 409.1ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:43:24,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-07-09 17:43:24,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 285. [2021-07-09 17:43:24,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.2183098591549295) internal successors, (630), 284 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:24,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 630 transitions. [2021-07-09 17:43:24,533 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 630 transitions. Word has length 21 [2021-07-09 17:43:24,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:24,533 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 630 transitions. [2021-07-09 17:43:24,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:24,533 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 630 transitions. [2021-07-09 17:43:24,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:24,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:24,534 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:24,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4217,909 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:24,741 INFO L430 AbstractCegarLoop]: === Iteration 915 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:24,741 INFO L82 PathProgramCache]: Analyzing trace with hash 274354826, now seen corresponding path program 909 times [2021-07-09 17:43:24,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:24,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077631966] [2021-07-09 17:43:24,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:24,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:24,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077631966] [2021-07-09 17:43:24,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077631966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:24,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930045205] [2021-07-09 17:43:24,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 910 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 910 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:24,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:43:24,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:24,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:24,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:25,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:25,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930045205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:25,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:25,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:43:25,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473387430] [2021-07-09 17:43:25,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:25,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:25,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:25,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:25,008 INFO L87 Difference]: Start difference. First operand 285 states and 630 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:25,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:25,489 INFO L93 Difference]: Finished difference Result 356 states and 768 transitions. [2021-07-09 17:43:25,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:43:25,489 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:25,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:25,489 INFO L225 Difference]: With dead ends: 356 [2021-07-09 17:43:25,489 INFO L226 Difference]: Without dead ends: 356 [2021-07-09 17:43:25,490 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 349.0ms TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:43:25,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-07-09 17:43:25,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 288. [2021-07-09 17:43:25,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.21602787456446) internal successors, (636), 287 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:25,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 636 transitions. [2021-07-09 17:43:25,492 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 636 transitions. Word has length 21 [2021-07-09 17:43:25,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:25,492 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 636 transitions. [2021-07-09 17:43:25,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 636 transitions. [2021-07-09 17:43:25,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:25,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:25,493 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:25,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4223,910 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:25,693 INFO L430 AbstractCegarLoop]: === Iteration 916 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash -970424230, now seen corresponding path program 910 times [2021-07-09 17:43:25,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:25,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645578615] [2021-07-09 17:43:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:25,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:25,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645578615] [2021-07-09 17:43:25,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645578615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:25,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598757514] [2021-07-09 17:43:25,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 911 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 911 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:25,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:25,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:25,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:25,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:25,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598757514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:25,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:25,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:25,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244689506] [2021-07-09 17:43:25,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:25,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:25,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:25,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:25,974 INFO L87 Difference]: Start difference. First operand 288 states and 636 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:26,744 INFO L93 Difference]: Finished difference Result 379 states and 814 transitions. [2021-07-09 17:43:26,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:43:26,744 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:26,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:26,744 INFO L225 Difference]: With dead ends: 379 [2021-07-09 17:43:26,744 INFO L226 Difference]: Without dead ends: 379 [2021-07-09 17:43:26,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 633.9ms TimeCoverageRelationStatistics Valid=181, Invalid=1301, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:43:26,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-07-09 17:43:26,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 289. [2021-07-09 17:43:26,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.2152777777777777) internal successors, (638), 288 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:26,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 638 transitions. [2021-07-09 17:43:26,747 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 638 transitions. Word has length 21 [2021-07-09 17:43:26,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:26,747 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 638 transitions. [2021-07-09 17:43:26,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:26,748 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 638 transitions. [2021-07-09 17:43:26,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:26,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:26,748 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:26,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4227,911 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:26,948 INFO L430 AbstractCegarLoop]: === Iteration 917 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:26,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:26,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1330340748, now seen corresponding path program 911 times [2021-07-09 17:43:26,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:26,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925075420] [2021-07-09 17:43:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:27,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:27,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925075420] [2021-07-09 17:43:27,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925075420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:27,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493699476] [2021-07-09 17:43:27,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 912 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 912 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:27,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:43:27,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:27,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:27,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:27,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493699476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:27,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:27,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:43:27,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345817935] [2021-07-09 17:43:27,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:27,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:27,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:27,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:27,260 INFO L87 Difference]: Start difference. First operand 289 states and 638 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:28,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:28,170 INFO L93 Difference]: Finished difference Result 389 states and 835 transitions. [2021-07-09 17:43:28,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:43:28,170 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:28,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:28,171 INFO L225 Difference]: With dead ends: 389 [2021-07-09 17:43:28,171 INFO L226 Difference]: Without dead ends: 389 [2021-07-09 17:43:28,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 749.3ms TimeCoverageRelationStatistics Valid=197, Invalid=1609, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:43:28,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-07-09 17:43:28,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 290. [2021-07-09 17:43:28,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.2145328719723185) internal successors, (640), 289 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:28,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 640 transitions. [2021-07-09 17:43:28,174 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 640 transitions. Word has length 21 [2021-07-09 17:43:28,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:28,174 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 640 transitions. [2021-07-09 17:43:28,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:28,174 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 640 transitions. [2021-07-09 17:43:28,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:28,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:28,174 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:28,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 912 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4231 [2021-07-09 17:43:28,374 INFO L430 AbstractCegarLoop]: === Iteration 918 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:28,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:28,375 INFO L82 PathProgramCache]: Analyzing trace with hash -620292978, now seen corresponding path program 912 times [2021-07-09 17:43:28,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:28,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28331848] [2021-07-09 17:43:28,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:28,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:28,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28331848] [2021-07-09 17:43:28,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28331848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:28,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696891961] [2021-07-09 17:43:28,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 913 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 913 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:28,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:43:28,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:28,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:28,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:28,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:28,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:28,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:43:28,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:28,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:28,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:43:28,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:28,713 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:43:28,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:43:28,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:28,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:28,727 INFO L518 ElimStorePlain]: Eliminatee v_prenex_803 vanished before elimination [2021-07-09 17:43:28,727 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:28,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:28,728 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:43:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:28,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696891961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:28,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:28,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:28,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262603754] [2021-07-09 17:43:28,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:28,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:28,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:28,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:28,769 INFO L87 Difference]: Start difference. First operand 290 states and 640 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:29,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:29,460 INFO L93 Difference]: Finished difference Result 319 states and 695 transitions. [2021-07-09 17:43:29,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:43:29,460 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:29,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:29,460 INFO L225 Difference]: With dead ends: 319 [2021-07-09 17:43:29,461 INFO L226 Difference]: Without dead ends: 319 [2021-07-09 17:43:29,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 600.0ms TimeCoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:43:29,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-07-09 17:43:29,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 287. [2021-07-09 17:43:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.2167832167832167) internal successors, (634), 286 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:29,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 634 transitions. [2021-07-09 17:43:29,463 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 634 transitions. Word has length 21 [2021-07-09 17:43:29,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:29,463 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 634 transitions. [2021-07-09 17:43:29,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:29,463 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 634 transitions. [2021-07-09 17:43:29,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:29,463 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:29,464 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:29,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 913 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4241 [2021-07-09 17:43:29,664 INFO L430 AbstractCegarLoop]: === Iteration 919 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:29,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:29,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1856222510, now seen corresponding path program 913 times [2021-07-09 17:43:29,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:29,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953948828] [2021-07-09 17:43:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:29,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:29,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953948828] [2021-07-09 17:43:29,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953948828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:29,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815370020] [2021-07-09 17:43:29,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 914 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 914 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:29,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:29,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:29,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815370020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:29,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:29,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:43:29,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845005260] [2021-07-09 17:43:29,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:29,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:29,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:29,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:29,915 INFO L87 Difference]: Start difference. First operand 287 states and 634 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:30,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:30,453 INFO L93 Difference]: Finished difference Result 341 states and 737 transitions. [2021-07-09 17:43:30,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:43:30,454 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:30,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:30,454 INFO L225 Difference]: With dead ends: 341 [2021-07-09 17:43:30,454 INFO L226 Difference]: Without dead ends: 341 [2021-07-09 17:43:30,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 393.6ms TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:43:30,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-07-09 17:43:30,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 290. [2021-07-09 17:43:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.2145328719723185) internal successors, (640), 289 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:30,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 640 transitions. [2021-07-09 17:43:30,457 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 640 transitions. Word has length 21 [2021-07-09 17:43:30,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:30,457 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 640 transitions. [2021-07-09 17:43:30,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:30,457 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 640 transitions. [2021-07-09 17:43:30,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:30,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:30,457 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:30,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4248,914 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:30,658 INFO L430 AbstractCegarLoop]: === Iteration 920 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:30,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:30,658 INFO L82 PathProgramCache]: Analyzing trace with hash 2078828268, now seen corresponding path program 914 times [2021-07-09 17:43:30,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:30,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274488376] [2021-07-09 17:43:30,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:30,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:30,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274488376] [2021-07-09 17:43:30,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274488376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:30,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508156591] [2021-07-09 17:43:30,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 915 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 915 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:30,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:30,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:30,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:43:30,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:30,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:30,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:30,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:43:30,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:30,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:30,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:43:30,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:30,939 INFO L628 ElimStorePlain]: treesize reduction 74, result has 39.8 percent of original size [2021-07-09 17:43:30,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:30,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:43:30,943 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:43:30,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:30,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:43:30,961 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:30,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:30,975 INFO L518 ElimStorePlain]: Eliminatee v_prenex_805 vanished before elimination [2021-07-09 17:43:30,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:30,977 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:43:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:31,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508156591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:31,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:31,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:31,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131919309] [2021-07-09 17:43:31,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:31,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:31,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:31,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:31,020 INFO L87 Difference]: Start difference. First operand 290 states and 640 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:31,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:31,842 INFO L93 Difference]: Finished difference Result 377 states and 808 transitions. [2021-07-09 17:43:31,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:43:31,843 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:31,843 INFO L225 Difference]: With dead ends: 377 [2021-07-09 17:43:31,843 INFO L226 Difference]: Without dead ends: 377 [2021-07-09 17:43:31,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 642.0ms TimeCoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:43:31,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-07-09 17:43:31,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 291. [2021-07-09 17:43:31,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.213793103448276) internal successors, (642), 290 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:31,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 642 transitions. [2021-07-09 17:43:31,846 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 642 transitions. Word has length 21 [2021-07-09 17:43:31,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:31,846 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 642 transitions. [2021-07-09 17:43:31,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:31,846 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 642 transitions. [2021-07-09 17:43:31,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:31,846 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:31,846 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:32,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4252,915 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:32,047 INFO L430 AbstractCegarLoop]: === Iteration 921 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:32,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:32,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1506091258, now seen corresponding path program 915 times [2021-07-09 17:43:32,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:32,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410607100] [2021-07-09 17:43:32,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:32,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:32,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410607100] [2021-07-09 17:43:32,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410607100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:32,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856596371] [2021-07-09 17:43:32,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 916 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 916 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:32,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:43:32,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:32,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:32,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:32,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:32,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:32,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:43:32,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:32,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:32,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:32,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:32,334 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:43:32,334 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:32,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:43:32,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:32,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:32,348 INFO L518 ElimStorePlain]: Eliminatee v_prenex_808 vanished before elimination [2021-07-09 17:43:32,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:32,349 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:43:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:32,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856596371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:32,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:32,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:43:32,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158031633] [2021-07-09 17:43:32,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:32,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:32,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:32,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:32,375 INFO L87 Difference]: Start difference. First operand 291 states and 642 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:32,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:32,990 INFO L93 Difference]: Finished difference Result 328 states and 713 transitions. [2021-07-09 17:43:32,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:43:32,991 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:32,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:32,991 INFO L225 Difference]: With dead ends: 328 [2021-07-09 17:43:32,991 INFO L226 Difference]: Without dead ends: 328 [2021-07-09 17:43:32,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 498.7ms TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:43:32,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-07-09 17:43:32,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 289. [2021-07-09 17:43:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.2152777777777777) internal successors, (638), 288 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:32,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 638 transitions. [2021-07-09 17:43:32,994 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 638 transitions. Word has length 21 [2021-07-09 17:43:32,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:32,994 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 638 transitions. [2021-07-09 17:43:32,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:32,994 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 638 transitions. [2021-07-09 17:43:32,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:32,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:32,995 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:33,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4256,916 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:33,195 INFO L430 AbstractCegarLoop]: === Iteration 922 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:33,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:33,195 INFO L82 PathProgramCache]: Analyzing trace with hash -678024822, now seen corresponding path program 916 times [2021-07-09 17:43:33,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:33,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054683112] [2021-07-09 17:43:33,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:33,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:33,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054683112] [2021-07-09 17:43:33,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054683112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:33,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527056776] [2021-07-09 17:43:33,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 917 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 917 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:33,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:33,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:33,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:33,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:33,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527056776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:33,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:33,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:43:33,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634498377] [2021-07-09 17:43:33,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:33,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:33,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:33,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:33,481 INFO L87 Difference]: Start difference. First operand 289 states and 638 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:34,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:34,012 INFO L93 Difference]: Finished difference Result 338 states and 725 transitions. [2021-07-09 17:43:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:43:34,012 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:34,013 INFO L225 Difference]: With dead ends: 338 [2021-07-09 17:43:34,013 INFO L226 Difference]: Without dead ends: 338 [2021-07-09 17:43:34,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 434.0ms TimeCoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:43:34,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-07-09 17:43:34,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 291. [2021-07-09 17:43:34,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.217241379310345) internal successors, (643), 290 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:34,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 643 transitions. [2021-07-09 17:43:34,016 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 643 transitions. Word has length 21 [2021-07-09 17:43:34,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:34,016 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 643 transitions. [2021-07-09 17:43:34,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 643 transitions. [2021-07-09 17:43:34,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:34,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:34,016 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:34,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4263,917 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:34,217 INFO L430 AbstractCegarLoop]: === Iteration 923 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:34,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:34,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1332160888, now seen corresponding path program 917 times [2021-07-09 17:43:34,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:34,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905155149] [2021-07-09 17:43:34,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:34,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:34,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905155149] [2021-07-09 17:43:34,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905155149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:34,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766947816] [2021-07-09 17:43:34,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 918 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 918 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:34,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:43:34,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:34,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:34,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:34,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:34,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:34,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:34,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:34,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:34,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:34,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:43:34,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:34,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:34,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:34,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:43:34,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:34,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:34,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:43:34,461 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:34,490 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:43:34,490 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:34,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:34,491 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:43:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:34,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766947816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:34,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:34,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:43:34,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539280222] [2021-07-09 17:43:34,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:34,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:34,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:34,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:34,518 INFO L87 Difference]: Start difference. First operand 291 states and 643 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:35,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:35,001 INFO L93 Difference]: Finished difference Result 399 states and 846 transitions. [2021-07-09 17:43:35,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:43:35,002 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:35,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:35,002 INFO L225 Difference]: With dead ends: 399 [2021-07-09 17:43:35,002 INFO L226 Difference]: Without dead ends: 399 [2021-07-09 17:43:35,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 372.5ms TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:43:35,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-07-09 17:43:35,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 292. [2021-07-09 17:43:35,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.2268041237113403) internal successors, (648), 291 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:35,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 648 transitions. [2021-07-09 17:43:35,006 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 648 transitions. Word has length 21 [2021-07-09 17:43:35,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:35,006 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 648 transitions. [2021-07-09 17:43:35,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:35,006 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 648 transitions. [2021-07-09 17:43:35,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:35,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:35,006 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:35,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 918 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4273 [2021-07-09 17:43:35,207 INFO L430 AbstractCegarLoop]: === Iteration 924 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:35,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:35,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1550960076, now seen corresponding path program 918 times [2021-07-09 17:43:35,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:35,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571393394] [2021-07-09 17:43:35,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:35,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:35,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571393394] [2021-07-09 17:43:35,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571393394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:35,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464147771] [2021-07-09 17:43:35,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 919 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 919 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:35,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:43:35,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:35,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:43:35,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:35,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:35,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 17:43:35,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:35,508 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 17:43:35,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-07-09 17:43:35,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:35,524 INFO L628 ElimStorePlain]: treesize reduction 2, result has 87.5 percent of original size [2021-07-09 17:43:35,524 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:35,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:35,525 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:14 [2021-07-09 17:43:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:35,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464147771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:35,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:35,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:43:35,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304433455] [2021-07-09 17:43:35,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:43:35,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:35,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:43:35,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:43:35,553 INFO L87 Difference]: Start difference. First operand 292 states and 648 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:36,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:36,244 INFO L93 Difference]: Finished difference Result 387 states and 825 transitions. [2021-07-09 17:43:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:43:36,245 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:36,245 INFO L225 Difference]: With dead ends: 387 [2021-07-09 17:43:36,245 INFO L226 Difference]: Without dead ends: 383 [2021-07-09 17:43:36,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 606.0ms TimeCoverageRelationStatistics Valid=233, Invalid=1489, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:43:36,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-07-09 17:43:36,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 320. [2021-07-09 17:43:36,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.2445141065830723) internal successors, (716), 319 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 716 transitions. [2021-07-09 17:43:36,248 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 716 transitions. Word has length 21 [2021-07-09 17:43:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:36,248 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 716 transitions. [2021-07-09 17:43:36,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:36,248 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 716 transitions. [2021-07-09 17:43:36,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:36,248 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:36,248 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:36,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 919 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4283 [2021-07-09 17:43:36,449 INFO L430 AbstractCegarLoop]: === Iteration 925 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:36,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:36,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1464078842, now seen corresponding path program 919 times [2021-07-09 17:43:36,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:36,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429189648] [2021-07-09 17:43:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:36,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:36,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429189648] [2021-07-09 17:43:36,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429189648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:36,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380447978] [2021-07-09 17:43:36,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 920 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 920 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:36,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:36,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:36,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:36,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:36,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:43:36,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:36,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:36,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:43:36,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:36,700 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:43:36,700 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:36,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:43:36,701 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:43:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:36,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380447978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:36,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:36,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:43:36,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940386053] [2021-07-09 17:43:36,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:36,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:36,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:36,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:36,707 INFO L87 Difference]: Start difference. First operand 320 states and 716 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:37,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:37,135 INFO L93 Difference]: Finished difference Result 378 states and 827 transitions. [2021-07-09 17:43:37,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:43:37,136 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:37,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:37,136 INFO L225 Difference]: With dead ends: 378 [2021-07-09 17:43:37,136 INFO L226 Difference]: Without dead ends: 378 [2021-07-09 17:43:37,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 354.6ms TimeCoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:43:37,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-09 17:43:37,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 318. [2021-07-09 17:43:37,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.2365930599369084) internal successors, (709), 317 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:37,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 709 transitions. [2021-07-09 17:43:37,139 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 709 transitions. Word has length 21 [2021-07-09 17:43:37,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:37,139 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 709 transitions. [2021-07-09 17:43:37,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:37,139 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 709 transitions. [2021-07-09 17:43:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:37,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:37,139 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:37,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 920 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4287 [2021-07-09 17:43:37,340 INFO L430 AbstractCegarLoop]: === Iteration 926 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:37,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:37,340 INFO L82 PathProgramCache]: Analyzing trace with hash 941957830, now seen corresponding path program 920 times [2021-07-09 17:43:37,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:37,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673917314] [2021-07-09 17:43:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:37,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:37,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673917314] [2021-07-09 17:43:37,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673917314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:37,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7012567] [2021-07-09 17:43:37,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 921 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 921 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:37,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:37,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:37,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:43:37,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:37,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:37,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:37,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:37,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:37,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:37,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:37,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:37,639 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-07-09 17:43:37,639 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:37,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:43:37,639 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:43:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:37,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7012567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:37,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:37,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:43:37,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818057025] [2021-07-09 17:43:37,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:43:37,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:37,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:43:37,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:43:37,658 INFO L87 Difference]: Start difference. First operand 318 states and 709 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:37,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:37,840 INFO L93 Difference]: Finished difference Result 345 states and 761 transitions. [2021-07-09 17:43:37,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:43:37,841 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:37,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:37,841 INFO L225 Difference]: With dead ends: 345 [2021-07-09 17:43:37,841 INFO L226 Difference]: Without dead ends: 345 [2021-07-09 17:43:37,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 211.7ms TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:43:37,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-07-09 17:43:37,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 318. [2021-07-09 17:43:37,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.2365930599369084) internal successors, (709), 317 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:37,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 709 transitions. [2021-07-09 17:43:37,844 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 709 transitions. Word has length 21 [2021-07-09 17:43:37,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:37,844 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 709 transitions. [2021-07-09 17:43:37,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:37,844 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 709 transitions. [2021-07-09 17:43:37,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:37,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:37,845 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:38,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4291,921 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:38,045 INFO L430 AbstractCegarLoop]: === Iteration 927 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:38,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:38,045 INFO L82 PathProgramCache]: Analyzing trace with hash -231654198, now seen corresponding path program 921 times [2021-07-09 17:43:38,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:38,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024571605] [2021-07-09 17:43:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:38,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:38,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024571605] [2021-07-09 17:43:38,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024571605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:38,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823877349] [2021-07-09 17:43:38,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 922 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 922 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:38,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:43:38,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:38,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:43:38,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:38,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823877349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:38,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:38,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:38,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368104462] [2021-07-09 17:43:38,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:38,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:38,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:38,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:38,396 INFO L87 Difference]: Start difference. First operand 318 states and 709 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:38,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:38,681 INFO L93 Difference]: Finished difference Result 337 states and 738 transitions. [2021-07-09 17:43:38,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:43:38,681 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:38,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:38,681 INFO L225 Difference]: With dead ends: 337 [2021-07-09 17:43:38,681 INFO L226 Difference]: Without dead ends: 325 [2021-07-09 17:43:38,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 366.8ms TimeCoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:43:38,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-07-09 17:43:38,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 317. [2021-07-09 17:43:38,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.2341772151898733) internal successors, (706), 316 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:38,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 706 transitions. [2021-07-09 17:43:38,684 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 706 transitions. Word has length 21 [2021-07-09 17:43:38,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:38,684 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 706 transitions. [2021-07-09 17:43:38,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:38,684 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 706 transitions. [2021-07-09 17:43:38,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:38,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:38,685 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:38,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 922 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4293 [2021-07-09 17:43:38,885 INFO L430 AbstractCegarLoop]: === Iteration 928 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:38,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:38,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1289806698, now seen corresponding path program 922 times [2021-07-09 17:43:38,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:38,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141257734] [2021-07-09 17:43:38,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:38,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:38,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141257734] [2021-07-09 17:43:38,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141257734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:38,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749280970] [2021-07-09 17:43:38,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 923 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 923 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:39,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:39,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:39,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:39,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:39,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749280970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:39,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:39,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:39,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956899252] [2021-07-09 17:43:39,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:39,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:39,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:39,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:39,192 INFO L87 Difference]: Start difference. First operand 317 states and 706 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:39,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:39,675 INFO L93 Difference]: Finished difference Result 380 states and 831 transitions. [2021-07-09 17:43:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:43:39,676 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:39,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:39,676 INFO L225 Difference]: With dead ends: 380 [2021-07-09 17:43:39,676 INFO L226 Difference]: Without dead ends: 380 [2021-07-09 17:43:39,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 458.7ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:43:39,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-07-09 17:43:39,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 318. [2021-07-09 17:43:39,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.2334384858044163) internal successors, (708), 317 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:39,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 708 transitions. [2021-07-09 17:43:39,679 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 708 transitions. Word has length 21 [2021-07-09 17:43:39,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:39,679 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 708 transitions. [2021-07-09 17:43:39,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:39,679 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 708 transitions. [2021-07-09 17:43:39,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:39,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:39,680 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:39,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4298,923 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:39,880 INFO L430 AbstractCegarLoop]: === Iteration 929 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:39,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:39,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1223251770, now seen corresponding path program 923 times [2021-07-09 17:43:39,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:39,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69022028] [2021-07-09 17:43:39,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:39,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:39,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69022028] [2021-07-09 17:43:39,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69022028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:39,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038367743] [2021-07-09 17:43:39,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 924 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 924 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:40,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:43:40,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:40,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:43:40,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:40,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:40,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:40,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:40,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:40,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:40,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:40,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:40,222 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-07-09 17:43:40,222 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:40,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:43:40,223 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-07-09 17:43:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:40,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038367743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:40,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:40,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:43:40,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122240054] [2021-07-09 17:43:40,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:43:40,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:40,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:43:40,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:43:40,249 INFO L87 Difference]: Start difference. First operand 318 states and 708 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:40,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:40,856 INFO L93 Difference]: Finished difference Result 394 states and 858 transitions. [2021-07-09 17:43:40,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:43:40,857 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:40,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:40,857 INFO L225 Difference]: With dead ends: 394 [2021-07-09 17:43:40,857 INFO L226 Difference]: Without dead ends: 394 [2021-07-09 17:43:40,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 511.0ms TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:43:40,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-09 17:43:40,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 319. [2021-07-09 17:43:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.2327044025157234) internal successors, (710), 318 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 710 transitions. [2021-07-09 17:43:40,860 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 710 transitions. Word has length 21 [2021-07-09 17:43:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:40,860 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 710 transitions. [2021-07-09 17:43:40,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 710 transitions. [2021-07-09 17:43:40,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:40,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:40,861 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:41,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4302,924 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:41,077 INFO L430 AbstractCegarLoop]: === Iteration 930 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:41,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1826936470, now seen corresponding path program 924 times [2021-07-09 17:43:41,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:41,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124581123] [2021-07-09 17:43:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:41,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:41,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124581123] [2021-07-09 17:43:41,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124581123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:41,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561321458] [2021-07-09 17:43:41,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 925 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 925 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:41,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:43:41,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:41,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:41,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:41,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561321458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:41,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:41,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:41,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288237549] [2021-07-09 17:43:41,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:41,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:41,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:41,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:41,444 INFO L87 Difference]: Start difference. First operand 319 states and 710 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:42,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:42,098 INFO L93 Difference]: Finished difference Result 393 states and 856 transitions. [2021-07-09 17:43:42,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:43:42,099 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:42,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:42,099 INFO L225 Difference]: With dead ends: 393 [2021-07-09 17:43:42,099 INFO L226 Difference]: Without dead ends: 393 [2021-07-09 17:43:42,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 570.4ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:43:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-07-09 17:43:42,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 320. [2021-07-09 17:43:42,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.231974921630094) internal successors, (712), 319 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 712 transitions. [2021-07-09 17:43:42,102 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 712 transitions. Word has length 21 [2021-07-09 17:43:42,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:42,102 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 712 transitions. [2021-07-09 17:43:42,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 712 transitions. [2021-07-09 17:43:42,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:42,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:42,103 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:42,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4304,925 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:42,303 INFO L430 AbstractCegarLoop]: === Iteration 931 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:42,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:42,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1467019952, now seen corresponding path program 925 times [2021-07-09 17:43:42,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:42,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338831456] [2021-07-09 17:43:42,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:42,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:42,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338831456] [2021-07-09 17:43:42,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338831456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:42,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989304217] [2021-07-09 17:43:42,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 926 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 926 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:42,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:43:42,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:42,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:42,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:42,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:43:42,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:42,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:42,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:43:42,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:42,693 INFO L628 ElimStorePlain]: treesize reduction 80, result has 35.0 percent of original size [2021-07-09 17:43:42,693 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:42,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:43:42,696 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:42,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:42,712 INFO L518 ElimStorePlain]: Eliminatee v_prenex_816 vanished before elimination [2021-07-09 17:43:42,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:42,713 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:43:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:42,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989304217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:42,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:42,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:43:42,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025779372] [2021-07-09 17:43:42,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:43:42,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:42,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:43:42,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:43:42,762 INFO L87 Difference]: Start difference. First operand 320 states and 712 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:43,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:43,385 INFO L93 Difference]: Finished difference Result 387 states and 844 transitions. [2021-07-09 17:43:43,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:43:43,385 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:43,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:43,386 INFO L225 Difference]: With dead ends: 387 [2021-07-09 17:43:43,386 INFO L226 Difference]: Without dead ends: 387 [2021-07-09 17:43:43,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 610.4ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:43:43,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-07-09 17:43:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 321. [2021-07-09 17:43:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.23125) internal successors, (714), 320 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 714 transitions. [2021-07-09 17:43:43,393 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 714 transitions. Word has length 21 [2021-07-09 17:43:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:43,393 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 714 transitions. [2021-07-09 17:43:43,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 714 transitions. [2021-07-09 17:43:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:43,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:43,394 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:43,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 926 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4308 [2021-07-09 17:43:43,594 INFO L430 AbstractCegarLoop]: === Iteration 932 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:43,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:43,595 INFO L82 PathProgramCache]: Analyzing trace with hash -2117899574, now seen corresponding path program 926 times [2021-07-09 17:43:43,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:43,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250149090] [2021-07-09 17:43:43,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:43,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:43,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250149090] [2021-07-09 17:43:43,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250149090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:43,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70635884] [2021-07-09 17:43:43,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 927 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 927 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:43,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:43,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:43,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:43:43,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:43,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:43,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:43,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:43:43,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:43,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:43,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:43,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:44,051 INFO L628 ElimStorePlain]: treesize reduction 76, result has 40.2 percent of original size [2021-07-09 17:43:44,051 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:44,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:44,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:44,054 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:44,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:44,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:44,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:43:44,074 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:43:44,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:44,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:44,090 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-07-09 17:43:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:44,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70635884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:44,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:44,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:43:44,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912959562] [2021-07-09 17:43:44,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:43:44,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:44,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:43:44,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:43:44,142 INFO L87 Difference]: Start difference. First operand 321 states and 714 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:44,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:44,383 INFO L93 Difference]: Finished difference Result 338 states and 746 transitions. [2021-07-09 17:43:44,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:43:44,383 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:44,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:44,384 INFO L225 Difference]: With dead ends: 338 [2021-07-09 17:43:44,384 INFO L226 Difference]: Without dead ends: 338 [2021-07-09 17:43:44,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 370.7ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:43:44,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-07-09 17:43:44,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 315. [2021-07-09 17:43:44,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.2356687898089174) internal successors, (702), 314 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:44,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 702 transitions. [2021-07-09 17:43:44,387 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 702 transitions. Word has length 21 [2021-07-09 17:43:44,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:44,387 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 702 transitions. [2021-07-09 17:43:44,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 702 transitions. [2021-07-09 17:43:44,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:44,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:44,387 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:44,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4312,927 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:44,588 INFO L430 AbstractCegarLoop]: === Iteration 933 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:44,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:44,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1619045270, now seen corresponding path program 927 times [2021-07-09 17:43:44,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:44,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565703404] [2021-07-09 17:43:44,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:44,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:44,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565703404] [2021-07-09 17:43:44,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565703404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:44,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352136444] [2021-07-09 17:43:44,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 928 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 928 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:44,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:43:44,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:44,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:44,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:44,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352136444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:44,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:44,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:44,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695902149] [2021-07-09 17:43:44,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:44,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:44,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:44,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:44,889 INFO L87 Difference]: Start difference. First operand 315 states and 702 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:45,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:45,083 INFO L93 Difference]: Finished difference Result 378 states and 827 transitions. [2021-07-09 17:43:45,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:43:45,083 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:45,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:45,084 INFO L225 Difference]: With dead ends: 378 [2021-07-09 17:43:45,084 INFO L226 Difference]: Without dead ends: 378 [2021-07-09 17:43:45,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:43:45,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-09 17:43:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 316. [2021-07-09 17:43:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.234920634920635) internal successors, (704), 315 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:45,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 704 transitions. [2021-07-09 17:43:45,087 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 704 transitions. Word has length 21 [2021-07-09 17:43:45,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:45,087 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 704 transitions. [2021-07-09 17:43:45,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 704 transitions. [2021-07-09 17:43:45,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:45,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:45,087 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:45,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 928 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4318 [2021-07-09 17:43:45,288 INFO L430 AbstractCegarLoop]: === Iteration 934 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:45,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:45,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1685600198, now seen corresponding path program 928 times [2021-07-09 17:43:45,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:45,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426345904] [2021-07-09 17:43:45,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:45,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:45,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426345904] [2021-07-09 17:43:45,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426345904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:45,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794034824] [2021-07-09 17:43:45,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 929 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 929 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:45,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:45,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:45,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:45,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:45,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794034824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:45,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:45,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:43:45,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868344240] [2021-07-09 17:43:45,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:43:45,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:45,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:43:45,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:43:45,629 INFO L87 Difference]: Start difference. First operand 316 states and 704 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:46,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:46,191 INFO L93 Difference]: Finished difference Result 404 states and 883 transitions. [2021-07-09 17:43:46,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:43:46,191 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:46,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:46,192 INFO L225 Difference]: With dead ends: 404 [2021-07-09 17:43:46,192 INFO L226 Difference]: Without dead ends: 404 [2021-07-09 17:43:46,192 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 502.2ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:43:46,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-07-09 17:43:46,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 317. [2021-07-09 17:43:46,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.2341772151898733) internal successors, (706), 316 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 706 transitions. [2021-07-09 17:43:46,200 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 706 transitions. Word has length 21 [2021-07-09 17:43:46,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:46,200 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 706 transitions. [2021-07-09 17:43:46,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:46,200 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 706 transitions. [2021-07-09 17:43:46,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:46,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:46,201 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:46,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4322,929 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:46,409 INFO L430 AbstractCegarLoop]: === Iteration 935 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:46,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:46,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1207237942, now seen corresponding path program 929 times [2021-07-09 17:43:46,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:46,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227881497] [2021-07-09 17:43:46,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:46,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:46,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227881497] [2021-07-09 17:43:46,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227881497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:46,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217426255] [2021-07-09 17:43:46,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 930 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 930 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:46,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:43:46,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:46,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:46,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:46,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217426255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:46,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:46,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:46,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849146271] [2021-07-09 17:43:46,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:46,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:46,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:46,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:46,777 INFO L87 Difference]: Start difference. First operand 317 states and 706 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:47,396 INFO L93 Difference]: Finished difference Result 335 states and 736 transitions. [2021-07-09 17:43:47,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:43:47,396 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:47,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:47,396 INFO L225 Difference]: With dead ends: 335 [2021-07-09 17:43:47,397 INFO L226 Difference]: Without dead ends: 329 [2021-07-09 17:43:47,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 608.5ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:43:47,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-07-09 17:43:47,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 317. [2021-07-09 17:43:47,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.2341772151898733) internal successors, (706), 316 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:47,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 706 transitions. [2021-07-09 17:43:47,399 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 706 transitions. Word has length 21 [2021-07-09 17:43:47,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:47,399 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 706 transitions. [2021-07-09 17:43:47,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:47,399 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 706 transitions. [2021-07-09 17:43:47,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:47,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:47,400 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:47,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4326,930 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:47,600 INFO L430 AbstractCegarLoop]: === Iteration 936 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:47,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:47,600 INFO L82 PathProgramCache]: Analyzing trace with hash 440821142, now seen corresponding path program 930 times [2021-07-09 17:43:47,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:47,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652834167] [2021-07-09 17:43:47,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:47,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:47,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652834167] [2021-07-09 17:43:47,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652834167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:47,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337691460] [2021-07-09 17:43:47,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 931 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 931 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:47,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:43:47,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:47,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:47,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:47,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337691460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:47,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:47,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:47,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394429745] [2021-07-09 17:43:47,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:47,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:47,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:47,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:47,943 INFO L87 Difference]: Start difference. First operand 317 states and 706 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:48,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:48,831 INFO L93 Difference]: Finished difference Result 430 states and 936 transitions. [2021-07-09 17:43:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:43:48,831 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:48,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:48,831 INFO L225 Difference]: With dead ends: 430 [2021-07-09 17:43:48,831 INFO L226 Difference]: Without dead ends: 430 [2021-07-09 17:43:48,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 756.5ms TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:43:48,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-07-09 17:43:48,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 318. [2021-07-09 17:43:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.2334384858044163) internal successors, (708), 317 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:48,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 708 transitions. [2021-07-09 17:43:48,835 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 708 transitions. Word has length 21 [2021-07-09 17:43:48,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:48,835 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 708 transitions. [2021-07-09 17:43:48,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:48,835 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 708 transitions. [2021-07-09 17:43:48,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:48,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:48,835 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:49,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4331,931 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:49,036 INFO L430 AbstractCegarLoop]: === Iteration 937 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:49,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:49,036 INFO L82 PathProgramCache]: Analyzing trace with hash 80904624, now seen corresponding path program 931 times [2021-07-09 17:43:49,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:49,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398299591] [2021-07-09 17:43:49,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:49,143 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:49,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:49,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398299591] [2021-07-09 17:43:49,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398299591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:49,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905642933] [2021-07-09 17:43:49,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 932 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 932 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:49,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:43:49,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:49,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:49,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:49,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:49,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:49,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:49,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:49,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:49,393 INFO L628 ElimStorePlain]: treesize reduction 76, result has 38.2 percent of original size [2021-07-09 17:43:49,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:49,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:43:49,396 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:49,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:49,411 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:49,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:49,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:43:49,414 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:43:49,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:49,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:49,429 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:43:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:49,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905642933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:49,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:49,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:43:49,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091952958] [2021-07-09 17:43:49,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:43:49,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:49,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:43:49,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:43:49,473 INFO L87 Difference]: Start difference. First operand 318 states and 708 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:50,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:50,401 INFO L93 Difference]: Finished difference Result 430 states and 934 transitions. [2021-07-09 17:43:50,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:43:50,401 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:50,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:50,402 INFO L225 Difference]: With dead ends: 430 [2021-07-09 17:43:50,402 INFO L226 Difference]: Without dead ends: 430 [2021-07-09 17:43:50,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 806.6ms TimeCoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:43:50,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-07-09 17:43:50,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 319. [2021-07-09 17:43:50,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.2327044025157234) internal successors, (710), 318 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:50,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 710 transitions. [2021-07-09 17:43:50,405 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 710 transitions. Word has length 21 [2021-07-09 17:43:50,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:50,405 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 710 transitions. [2021-07-09 17:43:50,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:50,405 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 710 transitions. [2021-07-09 17:43:50,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:50,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:50,406 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:50,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4335,932 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:50,606 INFO L430 AbstractCegarLoop]: === Iteration 938 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:50,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:50,606 INFO L82 PathProgramCache]: Analyzing trace with hash 790952394, now seen corresponding path program 932 times [2021-07-09 17:43:50,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:50,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19455858] [2021-07-09 17:43:50,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:50,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:50,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19455858] [2021-07-09 17:43:50,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19455858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:50,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323010280] [2021-07-09 17:43:50,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 933 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 933 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:50,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:50,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:50,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:43:50,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:50,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:50,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:50,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:50,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:50,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:50,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:43:50,948 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:50,993 INFO L628 ElimStorePlain]: treesize reduction 76, result has 40.2 percent of original size [2021-07-09 17:43:50,993 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:50,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:50,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:50,998 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:51,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:51,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:51,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 17:43:51,017 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:43:51,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:51,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:51,032 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-07-09 17:43:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:51,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323010280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:51,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:51,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:43:51,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033588592] [2021-07-09 17:43:51,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:43:51,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:51,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:43:51,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:43:51,079 INFO L87 Difference]: Start difference. First operand 319 states and 710 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:51,478 INFO L93 Difference]: Finished difference Result 346 states and 762 transitions. [2021-07-09 17:43:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:43:51,479 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:51,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:51,479 INFO L225 Difference]: With dead ends: 346 [2021-07-09 17:43:51,479 INFO L226 Difference]: Without dead ends: 346 [2021-07-09 17:43:51,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 408.7ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:43:51,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-07-09 17:43:51,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 314. [2021-07-09 17:43:51,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.236421725239617) internal successors, (700), 313 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:51,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 700 transitions. [2021-07-09 17:43:51,482 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 700 transitions. Word has length 21 [2021-07-09 17:43:51,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:51,482 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 700 transitions. [2021-07-09 17:43:51,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:51,482 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 700 transitions. [2021-07-09 17:43:51,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:51,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:51,482 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:51,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4339,933 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:51,683 INFO L430 AbstractCegarLoop]: === Iteration 939 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:51,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:51,683 INFO L82 PathProgramCache]: Analyzing trace with hash -852965178, now seen corresponding path program 933 times [2021-07-09 17:43:51,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:51,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454901478] [2021-07-09 17:43:51,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:51,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:51,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454901478] [2021-07-09 17:43:51,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454901478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:51,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367071031] [2021-07-09 17:43:51,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 934 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 934 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:51,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:43:51,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:51,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:51,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:51,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367071031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:51,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:51,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:51,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035221850] [2021-07-09 17:43:51,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:51,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:51,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:51,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:51,981 INFO L87 Difference]: Start difference. First operand 314 states and 700 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:52,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:52,289 INFO L93 Difference]: Finished difference Result 378 states and 825 transitions. [2021-07-09 17:43:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:43:52,289 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:52,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:52,289 INFO L225 Difference]: With dead ends: 378 [2021-07-09 17:43:52,289 INFO L226 Difference]: Without dead ends: 378 [2021-07-09 17:43:52,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 248.8ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:43:52,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-09 17:43:52,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 316. [2021-07-09 17:43:52,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.234920634920635) internal successors, (704), 315 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 704 transitions. [2021-07-09 17:43:52,292 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 704 transitions. Word has length 21 [2021-07-09 17:43:52,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:52,292 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 704 transitions. [2021-07-09 17:43:52,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:52,293 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 704 transitions. [2021-07-09 17:43:52,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:52,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:52,293 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:52,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4345,934 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:52,493 INFO L430 AbstractCegarLoop]: === Iteration 940 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:52,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:52,494 INFO L82 PathProgramCache]: Analyzing trace with hash -2097744234, now seen corresponding path program 934 times [2021-07-09 17:43:52,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:52,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512228623] [2021-07-09 17:43:52,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:52,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:52,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512228623] [2021-07-09 17:43:52,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512228623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:52,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794249864] [2021-07-09 17:43:52,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 935 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 935 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:52,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:52,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:52,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:52,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:52,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794249864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:52,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:52,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:52,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32589019] [2021-07-09 17:43:52,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:52,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:52,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:52,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:52,775 INFO L87 Difference]: Start difference. First operand 316 states and 704 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:53,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:53,391 INFO L93 Difference]: Finished difference Result 422 states and 917 transitions. [2021-07-09 17:43:53,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:43:53,391 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:53,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:53,391 INFO L225 Difference]: With dead ends: 422 [2021-07-09 17:43:53,391 INFO L226 Difference]: Without dead ends: 422 [2021-07-09 17:43:53,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 535.4ms TimeCoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:43:53,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-07-09 17:43:53,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 317. [2021-07-09 17:43:53,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.2341772151898733) internal successors, (706), 316 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 706 transitions. [2021-07-09 17:43:53,395 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 706 transitions. Word has length 21 [2021-07-09 17:43:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:53,395 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 706 transitions. [2021-07-09 17:43:53,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:53,395 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 706 transitions. [2021-07-09 17:43:53,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:53,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:53,395 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:53,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4349,935 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:53,595 INFO L430 AbstractCegarLoop]: === Iteration 941 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:53,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:53,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1187237574, now seen corresponding path program 935 times [2021-07-09 17:43:53,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:53,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489986318] [2021-07-09 17:43:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:53,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:53,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489986318] [2021-07-09 17:43:53,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489986318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:53,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648619530] [2021-07-09 17:43:53,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 936 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 936 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:53,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:43:53,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:53,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:53,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:53,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648619530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:53,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:53,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:53,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588467006] [2021-07-09 17:43:53,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:53,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:53,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:53,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:53,911 INFO L87 Difference]: Start difference. First operand 317 states and 706 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:54,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:54,737 INFO L93 Difference]: Finished difference Result 437 states and 949 transitions. [2021-07-09 17:43:54,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:43:54,737 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:54,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:54,737 INFO L225 Difference]: With dead ends: 437 [2021-07-09 17:43:54,738 INFO L226 Difference]: Without dead ends: 437 [2021-07-09 17:43:54,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 709.1ms TimeCoverageRelationStatistics Valid=189, Invalid=1371, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:43:54,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-07-09 17:43:54,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 318. [2021-07-09 17:43:54,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.2334384858044163) internal successors, (708), 317 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:54,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 708 transitions. [2021-07-09 17:43:54,741 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 708 transitions. Word has length 21 [2021-07-09 17:43:54,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:54,741 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 708 transitions. [2021-07-09 17:43:54,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:54,741 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 708 transitions. [2021-07-09 17:43:54,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:54,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:54,741 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:54,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 936 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4353 [2021-07-09 17:43:54,942 INFO L430 AbstractCegarLoop]: === Iteration 942 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:54,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:54,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1747612982, now seen corresponding path program 936 times [2021-07-09 17:43:54,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:54,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640157305] [2021-07-09 17:43:54,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:55,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:55,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640157305] [2021-07-09 17:43:55,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640157305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:55,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191112970] [2021-07-09 17:43:55,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 937 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 937 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:55,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:43:55,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:55,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:55,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:55,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:55,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:55,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:43:55,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:55,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:55,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:43:55,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:55,275 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:43:55,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:43:55,278 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:55,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:55,289 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:55,289 INFO L518 ElimStorePlain]: Eliminatee v_prenex_832 vanished before elimination [2021-07-09 17:43:55,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:55,290 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:43:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:55,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191112970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:55,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:55,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:55,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033508344] [2021-07-09 17:43:55,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:55,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:55,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:55,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:55,317 INFO L87 Difference]: Start difference. First operand 318 states and 708 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:55,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:55,922 INFO L93 Difference]: Finished difference Result 353 states and 776 transitions. [2021-07-09 17:43:55,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:43:55,923 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:55,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:55,923 INFO L225 Difference]: With dead ends: 353 [2021-07-09 17:43:55,923 INFO L226 Difference]: Without dead ends: 353 [2021-07-09 17:43:55,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 537.4ms TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:43:55,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-07-09 17:43:55,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 314. [2021-07-09 17:43:55,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.236421725239617) internal successors, (700), 313 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:55,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 700 transitions. [2021-07-09 17:43:55,926 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 700 transitions. Word has length 21 [2021-07-09 17:43:55,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:55,926 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 700 transitions. [2021-07-09 17:43:55,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:55,926 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 700 transitions. [2021-07-09 17:43:55,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:55,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:55,926 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:56,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 937 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4363 [2021-07-09 17:43:56,127 INFO L430 AbstractCegarLoop]: === Iteration 943 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:56,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:56,127 INFO L82 PathProgramCache]: Analyzing trace with hash -378518122, now seen corresponding path program 937 times [2021-07-09 17:43:56,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:56,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350991419] [2021-07-09 17:43:56,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:56,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:56,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350991419] [2021-07-09 17:43:56,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350991419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:56,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936013414] [2021-07-09 17:43:56,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 938 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 938 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:56,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:56,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:56,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936013414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:56,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:56,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:56,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414765662] [2021-07-09 17:43:56,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:56,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:56,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:56,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:56,383 INFO L87 Difference]: Start difference. First operand 314 states and 700 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:56,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:56,783 INFO L93 Difference]: Finished difference Result 370 states and 810 transitions. [2021-07-09 17:43:56,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:43:56,783 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:56,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:56,783 INFO L225 Difference]: With dead ends: 370 [2021-07-09 17:43:56,783 INFO L226 Difference]: Without dead ends: 370 [2021-07-09 17:43:56,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 307.8ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:43:56,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-07-09 17:43:56,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 316. [2021-07-09 17:43:56,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.234920634920635) internal successors, (704), 315 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 704 transitions. [2021-07-09 17:43:56,786 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 704 transitions. Word has length 21 [2021-07-09 17:43:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:56,786 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 704 transitions. [2021-07-09 17:43:56,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 704 transitions. [2021-07-09 17:43:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:56,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:56,787 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:56,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 938 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4370 [2021-07-09 17:43:56,987 INFO L430 AbstractCegarLoop]: === Iteration 944 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:56,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:56,987 INFO L82 PathProgramCache]: Analyzing trace with hash -738434640, now seen corresponding path program 938 times [2021-07-09 17:43:56,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:56,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249007380] [2021-07-09 17:43:56,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:57,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:57,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249007380] [2021-07-09 17:43:57,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249007380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:57,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641320919] [2021-07-09 17:43:57,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 939 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 939 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:57,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:57,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:57,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:43:57,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:57,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:57,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:57,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:57,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:57,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:57,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:43:57,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:57,285 INFO L628 ElimStorePlain]: treesize reduction 78, result has 35.5 percent of original size [2021-07-09 17:43:57,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-07-09 17:43:57,288 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:57,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:57,302 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:57,302 INFO L518 ElimStorePlain]: Eliminatee v_prenex_836 vanished before elimination [2021-07-09 17:43:57,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:57,303 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:43:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:57,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641320919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:57,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:57,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:43:57,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467110317] [2021-07-09 17:43:57,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:43:57,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:57,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:43:57,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:43:57,346 INFO L87 Difference]: Start difference. First operand 316 states and 704 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:57,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:57,815 INFO L93 Difference]: Finished difference Result 410 states and 891 transitions. [2021-07-09 17:43:57,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:43:57,815 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:57,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:57,816 INFO L225 Difference]: With dead ends: 410 [2021-07-09 17:43:57,816 INFO L226 Difference]: Without dead ends: 410 [2021-07-09 17:43:57,816 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 430.2ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:43:57,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-07-09 17:43:57,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 317. [2021-07-09 17:43:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.2341772151898733) internal successors, (706), 316 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:57,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 706 transitions. [2021-07-09 17:43:57,819 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 706 transitions. Word has length 21 [2021-07-09 17:43:57,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:57,819 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 706 transitions. [2021-07-09 17:43:57,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:57,819 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 706 transitions. [2021-07-09 17:43:57,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:57,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:57,819 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:58,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 939 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4374 [2021-07-09 17:43:58,020 INFO L430 AbstractCegarLoop]: === Iteration 945 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:58,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:58,020 INFO L82 PathProgramCache]: Analyzing trace with hash -28386870, now seen corresponding path program 939 times [2021-07-09 17:43:58,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:58,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159450763] [2021-07-09 17:43:58,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:58,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:58,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159450763] [2021-07-09 17:43:58,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159450763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:58,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609235392] [2021-07-09 17:43:58,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 940 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 940 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:58,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:43:58,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:58,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:58,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:58,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:58,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:58,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:43:58,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:58,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:58,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:43:58,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:58,326 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-07-09 17:43:58,326 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:43:58,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-07-09 17:43:58,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:58,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:58,342 INFO L518 ElimStorePlain]: Eliminatee v_prenex_838 vanished before elimination [2021-07-09 17:43:58,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:58,343 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:43:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:58,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609235392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:58,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:58,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:58,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62211371] [2021-07-09 17:43:58,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:58,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:58,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:58,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:58,372 INFO L87 Difference]: Start difference. First operand 317 states and 706 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:58,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:58,895 INFO L93 Difference]: Finished difference Result 355 states and 782 transitions. [2021-07-09 17:43:58,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:43:58,896 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:58,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:58,896 INFO L225 Difference]: With dead ends: 355 [2021-07-09 17:43:58,896 INFO L226 Difference]: Without dead ends: 355 [2021-07-09 17:43:58,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 454.6ms TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:43:58,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-07-09 17:43:58,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 315. [2021-07-09 17:43:58,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.2356687898089174) internal successors, (702), 314 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:58,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 702 transitions. [2021-07-09 17:43:58,899 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 702 transitions. Word has length 21 [2021-07-09 17:43:58,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:58,899 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 702 transitions. [2021-07-09 17:43:58,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:58,899 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 702 transitions. [2021-07-09 17:43:58,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:58,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:58,899 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:59,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4378,940 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:59,100 INFO L430 AbstractCegarLoop]: === Iteration 946 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:59,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1449748536, now seen corresponding path program 940 times [2021-07-09 17:43:59,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:59,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868806321] [2021-07-09 17:43:59,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:59,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:59,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868806321] [2021-07-09 17:43:59,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868806321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:59,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055919136] [2021-07-09 17:43:59,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 941 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 941 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:59,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:59,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:59,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:59,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:59,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055919136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:59,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:59,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:43:59,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327036479] [2021-07-09 17:43:59,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:59,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:59,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:59,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:59,366 INFO L87 Difference]: Start difference. First operand 315 states and 702 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:59,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:59,796 INFO L93 Difference]: Finished difference Result 358 states and 779 transitions. [2021-07-09 17:43:59,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:43:59,796 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:43:59,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:59,797 INFO L225 Difference]: With dead ends: 358 [2021-07-09 17:43:59,797 INFO L226 Difference]: Without dead ends: 358 [2021-07-09 17:43:59,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 416.7ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:43:59,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-07-09 17:43:59,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 317. [2021-07-09 17:43:59,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.2373417721518987) internal successors, (707), 316 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:59,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 707 transitions. [2021-07-09 17:43:59,800 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 707 transitions. Word has length 21 [2021-07-09 17:43:59,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:59,800 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 707 transitions. [2021-07-09 17:43:59,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:59,800 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 707 transitions. [2021-07-09 17:43:59,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:43:59,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:59,800 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:00,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 941 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4385 [2021-07-09 17:44:00,001 INFO L430 AbstractCegarLoop]: === Iteration 947 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:00,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:00,001 INFO L82 PathProgramCache]: Analyzing trace with hash -2135170990, now seen corresponding path program 941 times [2021-07-09 17:44:00,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:00,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337328239] [2021-07-09 17:44:00,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:00,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:00,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337328239] [2021-07-09 17:44:00,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337328239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:00,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493488240] [2021-07-09 17:44:00,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 942 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 942 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:00,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:44:00,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:00,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:44:00,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:00,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:00,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:00,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:44:00,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:00,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:00,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:00,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:44:00,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:00,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:00,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:00,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:44:00,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:00,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:00,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:44:00,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:00,290 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:44:00,290 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:44:00,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:00,291 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:44:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:00,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493488240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:00,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:00,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:44:00,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817256623] [2021-07-09 17:44:00,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:44:00,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:00,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:44:00,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:44:00,316 INFO L87 Difference]: Start difference. First operand 317 states and 707 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:00,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:00,974 INFO L93 Difference]: Finished difference Result 428 states and 915 transitions. [2021-07-09 17:44:00,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:44:00,974 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:00,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:00,974 INFO L225 Difference]: With dead ends: 428 [2021-07-09 17:44:00,974 INFO L226 Difference]: Without dead ends: 428 [2021-07-09 17:44:00,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 584.1ms TimeCoverageRelationStatistics Valid=196, Invalid=1526, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:44:00,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-07-09 17:44:00,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 318. [2021-07-09 17:44:00,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.2460567823343847) internal successors, (712), 317 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:00,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 712 transitions. [2021-07-09 17:44:00,977 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 712 transitions. Word has length 21 [2021-07-09 17:44:00,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:00,978 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 712 transitions. [2021-07-09 17:44:00,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:00,978 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 712 transitions. [2021-07-09 17:44:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:00,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:00,978 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:01,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 942 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4395 [2021-07-09 17:44:01,178 INFO L430 AbstractCegarLoop]: === Iteration 948 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:01,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:01,179 INFO L82 PathProgramCache]: Analyzing trace with hash -73255688, now seen corresponding path program 942 times [2021-07-09 17:44:01,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:01,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014933855] [2021-07-09 17:44:01,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:01,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:01,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014933855] [2021-07-09 17:44:01,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014933855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:01,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910442940] [2021-07-09 17:44:01,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 943 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 943 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:01,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:44:01,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:01,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:44:01,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:01,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910442940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:01,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:01,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:44:01,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670046195] [2021-07-09 17:44:01,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:44:01,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:01,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:44:01,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:44:01,445 INFO L87 Difference]: Start difference. First operand 318 states and 712 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:01,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:01,798 INFO L93 Difference]: Finished difference Result 329 states and 728 transitions. [2021-07-09 17:44:01,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:44:01,798 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:01,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:01,799 INFO L225 Difference]: With dead ends: 329 [2021-07-09 17:44:01,799 INFO L226 Difference]: Without dead ends: 325 [2021-07-09 17:44:01,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 363.5ms TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:44:01,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-07-09 17:44:01,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 318. [2021-07-09 17:44:01,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.2429022082018926) internal successors, (711), 317 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:01,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 711 transitions. [2021-07-09 17:44:01,801 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 711 transitions. Word has length 21 [2021-07-09 17:44:01,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:01,801 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 711 transitions. [2021-07-09 17:44:01,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:01,802 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 711 transitions. [2021-07-09 17:44:01,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:01,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:01,802 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:02,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 943 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4405 [2021-07-09 17:44:02,002 INFO L430 AbstractCegarLoop]: === Iteration 949 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:02,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:02,002 INFO L82 PathProgramCache]: Analyzing trace with hash 13625546, now seen corresponding path program 943 times [2021-07-09 17:44:02,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:02,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036557015] [2021-07-09 17:44:02,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:02,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:02,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036557015] [2021-07-09 17:44:02,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036557015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:02,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313476179] [2021-07-09 17:44:02,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 944 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 944 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:02,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:44:02,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:02,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:02,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:02,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:44:02,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:02,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:02,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:44:02,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:02,266 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:44:02,267 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:44:02,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:44:02,267 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:44:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:02,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313476179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:02,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:02,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:44:02,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510991887] [2021-07-09 17:44:02,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:44:02,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:02,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:44:02,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:44:02,273 INFO L87 Difference]: Start difference. First operand 318 states and 711 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:02,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:02,671 INFO L93 Difference]: Finished difference Result 368 states and 807 transitions. [2021-07-09 17:44:02,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:44:02,671 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:02,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:02,672 INFO L225 Difference]: With dead ends: 368 [2021-07-09 17:44:02,672 INFO L226 Difference]: Without dead ends: 368 [2021-07-09 17:44:02,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 344.0ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:44:02,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-07-09 17:44:02,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 314. [2021-07-09 17:44:02,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.236421725239617) internal successors, (700), 313 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:02,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 700 transitions. [2021-07-09 17:44:02,675 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 700 transitions. Word has length 21 [2021-07-09 17:44:02,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:02,675 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 700 transitions. [2021-07-09 17:44:02,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:02,675 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 700 transitions. [2021-07-09 17:44:02,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:02,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:02,675 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:02,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4409,944 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:02,876 INFO L430 AbstractCegarLoop]: === Iteration 950 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:02,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:02,876 INFO L82 PathProgramCache]: Analyzing trace with hash -86118714, now seen corresponding path program 944 times [2021-07-09 17:44:02,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:02,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402660917] [2021-07-09 17:44:02,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:02,989 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:02,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:02,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402660917] [2021-07-09 17:44:02,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402660917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:02,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115633984] [2021-07-09 17:44:02,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 945 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 945 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:03,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:44:03,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:03,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:44:03,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:03,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:03,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:03,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:44:03,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:03,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:03,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:03,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:44:03,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:03,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:03,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:03,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:44:03,150 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:03,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:03,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:44:03,153 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:03,190 INFO L628 ElimStorePlain]: treesize reduction 67, result has 38.5 percent of original size [2021-07-09 17:44:03,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:03,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:44:03,193 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:44:03,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:03,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:03,209 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-07-09 17:44:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:03,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115633984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:03,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:03,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:44:03,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168206616] [2021-07-09 17:44:03,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:44:03,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:03,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:44:03,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:44:03,255 INFO L87 Difference]: Start difference. First operand 314 states and 700 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:03,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:03,872 INFO L93 Difference]: Finished difference Result 365 states and 792 transitions. [2021-07-09 17:44:03,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:44:03,872 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:03,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:03,873 INFO L225 Difference]: With dead ends: 365 [2021-07-09 17:44:03,873 INFO L226 Difference]: Without dead ends: 365 [2021-07-09 17:44:03,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 520.0ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:44:03,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-07-09 17:44:03,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 317. [2021-07-09 17:44:03,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.240506329113924) internal successors, (708), 316 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:03,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 708 transitions. [2021-07-09 17:44:03,876 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 708 transitions. Word has length 21 [2021-07-09 17:44:03,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:03,876 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 708 transitions. [2021-07-09 17:44:03,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:03,876 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 708 transitions. [2021-07-09 17:44:03,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:03,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:03,876 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:04,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 945 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4413 [2021-07-09 17:44:04,077 INFO L430 AbstractCegarLoop]: === Iteration 951 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:04,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:04,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1924066996, now seen corresponding path program 945 times [2021-07-09 17:44:04,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:04,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497762057] [2021-07-09 17:44:04,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:04,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:04,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497762057] [2021-07-09 17:44:04,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497762057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:04,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956501618] [2021-07-09 17:44:04,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 946 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 946 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:04,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:44:04,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:04,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:44:04,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:04,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:04,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:04,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:44:04,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:04,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:04,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:04,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:44:04,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:04,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:04,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:04,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:44:04,358 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:04,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:04,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:44:04,361 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:04,388 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-07-09 17:44:04,388 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:44:04,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:04,388 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-07-09 17:44:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:04,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956501618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:04,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:04,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:44:04,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116294613] [2021-07-09 17:44:04,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:44:04,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:04,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:44:04,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:44:04,414 INFO L87 Difference]: Start difference. First operand 317 states and 708 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:05,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:05,370 INFO L93 Difference]: Finished difference Result 455 states and 976 transitions. [2021-07-09 17:44:05,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:44:05,371 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:05,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:05,371 INFO L225 Difference]: With dead ends: 455 [2021-07-09 17:44:05,371 INFO L226 Difference]: Without dead ends: 455 [2021-07-09 17:44:05,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 783.0ms TimeCoverageRelationStatistics Valid=242, Invalid=1828, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:44:05,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-07-09 17:44:05,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 319. [2021-07-09 17:44:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.251572327044025) internal successors, (716), 318 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:05,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 716 transitions. [2021-07-09 17:44:05,374 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 716 transitions. Word has length 21 [2021-07-09 17:44:05,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:05,374 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 716 transitions. [2021-07-09 17:44:05,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:05,374 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 716 transitions. [2021-07-09 17:44:05,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:05,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:05,375 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:05,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4417,946 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:05,575 INFO L430 AbstractCegarLoop]: === Iteration 952 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:05,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:05,575 INFO L82 PathProgramCache]: Analyzing trace with hash -959053968, now seen corresponding path program 946 times [2021-07-09 17:44:05,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:05,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691030810] [2021-07-09 17:44:05,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:05,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:05,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691030810] [2021-07-09 17:44:05,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691030810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:05,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659997121] [2021-07-09 17:44:05,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 947 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 947 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:05,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:44:05,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:05,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:44:05,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:05,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659997121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:05,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:05,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:44:05,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064182142] [2021-07-09 17:44:05,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:44:05,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:05,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:44:05,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:44:05,880 INFO L87 Difference]: Start difference. First operand 319 states and 716 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:06,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:06,474 INFO L93 Difference]: Finished difference Result 336 states and 742 transitions. [2021-07-09 17:44:06,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:44:06,474 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:06,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:06,475 INFO L225 Difference]: With dead ends: 336 [2021-07-09 17:44:06,475 INFO L226 Difference]: Without dead ends: 332 [2021-07-09 17:44:06,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 581.0ms TimeCoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:44:06,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-07-09 17:44:06,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 319. [2021-07-09 17:44:06,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.248427672955975) internal successors, (715), 318 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:06,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 715 transitions. [2021-07-09 17:44:06,478 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 715 transitions. Word has length 21 [2021-07-09 17:44:06,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:06,478 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 715 transitions. [2021-07-09 17:44:06,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:06,478 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 715 transitions. [2021-07-09 17:44:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:06,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:06,478 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:06,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 947 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4427 [2021-07-09 17:44:06,679 INFO L430 AbstractCegarLoop]: === Iteration 953 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:06,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:06,679 INFO L82 PathProgramCache]: Analyzing trace with hash -872172734, now seen corresponding path program 947 times [2021-07-09 17:44:06,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:06,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260331446] [2021-07-09 17:44:06,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:06,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:06,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260331446] [2021-07-09 17:44:06,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260331446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:06,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293127458] [2021-07-09 17:44:06,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 948 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 948 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:06,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:44:06,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:06,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:44:06,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:06,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:06,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:06,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:44:06,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:06,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:06,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:44:06,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:06,953 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:44:06,953 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:44:06,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:44:06,954 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:44:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:06,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293127458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:06,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:06,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:44:06,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607453055] [2021-07-09 17:44:06,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:44:06,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:06,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:44:06,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:44:06,960 INFO L87 Difference]: Start difference. First operand 319 states and 715 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:07,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:07,612 INFO L93 Difference]: Finished difference Result 394 states and 860 transitions. [2021-07-09 17:44:07,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:44:07,612 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:07,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:07,613 INFO L225 Difference]: With dead ends: 394 [2021-07-09 17:44:07,613 INFO L226 Difference]: Without dead ends: 394 [2021-07-09 17:44:07,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 554.7ms TimeCoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:44:07,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-09 17:44:07,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 318. [2021-07-09 17:44:07,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.2492113564668768) internal successors, (713), 317 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 713 transitions. [2021-07-09 17:44:07,615 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 713 transitions. Word has length 21 [2021-07-09 17:44:07,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:07,616 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 713 transitions. [2021-07-09 17:44:07,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:07,616 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 713 transitions. [2021-07-09 17:44:07,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:07,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:07,616 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:07,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 948 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4431 [2021-07-09 17:44:07,816 INFO L430 AbstractCegarLoop]: === Iteration 954 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:07,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:07,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1465400234, now seen corresponding path program 948 times [2021-07-09 17:44:07,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:07,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831219884] [2021-07-09 17:44:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:07,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:07,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831219884] [2021-07-09 17:44:07,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831219884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:07,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607078438] [2021-07-09 17:44:07,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 949 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 949 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:07,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:44:07,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:07,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:44:07,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:08,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607078438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:08,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:08,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:44:08,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471865735] [2021-07-09 17:44:08,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:44:08,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:08,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:44:08,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:44:08,069 INFO L87 Difference]: Start difference. First operand 318 states and 713 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:08,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:08,409 INFO L93 Difference]: Finished difference Result 332 states and 734 transitions. [2021-07-09 17:44:08,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:44:08,409 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:08,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:08,410 INFO L225 Difference]: With dead ends: 332 [2021-07-09 17:44:08,410 INFO L226 Difference]: Without dead ends: 326 [2021-07-09 17:44:08,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 311.8ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:44:08,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-07-09 17:44:08,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 318. [2021-07-09 17:44:08,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.2460567823343847) internal successors, (712), 317 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:08,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 712 transitions. [2021-07-09 17:44:08,413 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 712 transitions. Word has length 21 [2021-07-09 17:44:08,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:08,413 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 712 transitions. [2021-07-09 17:44:08,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:08,413 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 712 transitions. [2021-07-09 17:44:08,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:08,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:08,413 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:08,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4435,949 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:08,614 INFO L430 AbstractCegarLoop]: === Iteration 955 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:08,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:08,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1316010442, now seen corresponding path program 949 times [2021-07-09 17:44:08,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:08,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537235609] [2021-07-09 17:44:08,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:08,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:08,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:08,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537235609] [2021-07-09 17:44:08,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537235609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:08,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079705704] [2021-07-09 17:44:08,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 950 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 950 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:08,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:44:08,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:08,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:08,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:08,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:44:08,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:08,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:08,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:44:08,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:08,879 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-07-09 17:44:08,879 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:44:08,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:44:08,879 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-07-09 17:44:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:08,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079705704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:08,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:08,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 17:44:08,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916100074] [2021-07-09 17:44:08,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:44:08,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:08,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:44:08,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:44:08,885 INFO L87 Difference]: Start difference. First operand 318 states and 712 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:09,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:09,316 INFO L93 Difference]: Finished difference Result 372 states and 815 transitions. [2021-07-09 17:44:09,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:44:09,316 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:09,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:09,317 INFO L225 Difference]: With dead ends: 372 [2021-07-09 17:44:09,317 INFO L226 Difference]: Without dead ends: 372 [2021-07-09 17:44:09,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 344.5ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:44:09,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-07-09 17:44:09,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 315. [2021-07-09 17:44:09,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.2356687898089174) internal successors, (702), 314 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:09,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 702 transitions. [2021-07-09 17:44:09,320 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 702 transitions. Word has length 21 [2021-07-09 17:44:09,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:09,320 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 702 transitions. [2021-07-09 17:44:09,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:09,320 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 702 transitions. [2021-07-09 17:44:09,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:09,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:09,320 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:09,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 950 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4439 [2021-07-09 17:44:09,521 INFO L430 AbstractCegarLoop]: === Iteration 956 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:09,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:09,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1182332586, now seen corresponding path program 950 times [2021-07-09 17:44:09,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:09,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435829620] [2021-07-09 17:44:09,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:09,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:09,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435829620] [2021-07-09 17:44:09,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435829620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:09,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976434439] [2021-07-09 17:44:09,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 951 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 951 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:09,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:44:09,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:09,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:44:09,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:09,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976434439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:09,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:09,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:44:09,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887468057] [2021-07-09 17:44:09,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:44:09,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:09,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:44:09,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:44:09,865 INFO L87 Difference]: Start difference. First operand 315 states and 702 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:10,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:10,153 INFO L93 Difference]: Finished difference Result 335 states and 733 transitions. [2021-07-09 17:44:10,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:44:10,153 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:10,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:10,153 INFO L225 Difference]: With dead ends: 335 [2021-07-09 17:44:10,153 INFO L226 Difference]: Without dead ends: 320 [2021-07-09 17:44:10,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:44:10,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-07-09 17:44:10,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 315. [2021-07-09 17:44:10,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.232484076433121) internal successors, (701), 314 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:10,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 701 transitions. [2021-07-09 17:44:10,156 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 701 transitions. Word has length 21 [2021-07-09 17:44:10,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:10,156 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 701 transitions. [2021-07-09 17:44:10,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:10,156 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 701 transitions. [2021-07-09 17:44:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:10,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:10,157 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:10,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4443,951 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:10,357 INFO L430 AbstractCegarLoop]: === Iteration 957 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:10,357 INFO L82 PathProgramCache]: Analyzing trace with hash 374678282, now seen corresponding path program 951 times [2021-07-09 17:44:10,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:10,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550140650] [2021-07-09 17:44:10,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:10,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:10,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550140650] [2021-07-09 17:44:10,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550140650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:10,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471101758] [2021-07-09 17:44:10,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 952 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 952 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:10,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:44:10,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:10,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:44:10,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:10,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471101758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:10,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:10,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 17:44:10,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239255513] [2021-07-09 17:44:10,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:44:10,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:10,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:44:10,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:44:10,692 INFO L87 Difference]: Start difference. First operand 315 states and 701 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:10,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:10,898 INFO L93 Difference]: Finished difference Result 340 states and 750 transitions. [2021-07-09 17:44:10,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:44:10,899 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:10,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:10,899 INFO L225 Difference]: With dead ends: 340 [2021-07-09 17:44:10,899 INFO L226 Difference]: Without dead ends: 340 [2021-07-09 17:44:10,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 236.8ms TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:44:10,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-07-09 17:44:10,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 315. [2021-07-09 17:44:10,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.232484076433121) internal successors, (701), 314 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:10,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 701 transitions. [2021-07-09 17:44:10,902 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 701 transitions. Word has length 21 [2021-07-09 17:44:10,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:10,902 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 701 transitions. [2021-07-09 17:44:10,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:10,902 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 701 transitions. [2021-07-09 17:44:10,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:10,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:10,902 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:11,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 952 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4448 [2021-07-09 17:44:11,103 INFO L430 AbstractCegarLoop]: === Iteration 958 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:11,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:11,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1857086246, now seen corresponding path program 952 times [2021-07-09 17:44:11,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:11,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078025219] [2021-07-09 17:44:11,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:11,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:11,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078025219] [2021-07-09 17:44:11,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078025219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:11,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175851970] [2021-07-09 17:44:11,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 953 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 953 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:11,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:44:11,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:11,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:44:11,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:11,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175851970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:11,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:11,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:44:11,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261283221] [2021-07-09 17:44:11,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:44:11,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:11,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:44:11,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:44:11,426 INFO L87 Difference]: Start difference. First operand 315 states and 701 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:11,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:11,843 INFO L93 Difference]: Finished difference Result 373 states and 817 transitions. [2021-07-09 17:44:11,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:44:11,843 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:11,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:11,844 INFO L225 Difference]: With dead ends: 373 [2021-07-09 17:44:11,844 INFO L226 Difference]: Without dead ends: 373 [2021-07-09 17:44:11,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 467.1ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:44:11,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-07-09 17:44:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 315. [2021-07-09 17:44:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.232484076433121) internal successors, (701), 314 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 701 transitions. [2021-07-09 17:44:11,847 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 701 transitions. Word has length 21 [2021-07-09 17:44:11,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:11,847 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 701 transitions. [2021-07-09 17:44:11,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:11,847 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 701 transitions. [2021-07-09 17:44:11,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:11,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:11,847 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:12,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 953 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4452 [2021-07-09 17:44:12,047 INFO L430 AbstractCegarLoop]: === Iteration 959 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:12,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:12,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1790531318, now seen corresponding path program 953 times [2021-07-09 17:44:12,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:12,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406070280] [2021-07-09 17:44:12,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:12,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:12,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406070280] [2021-07-09 17:44:12,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406070280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:12,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750016049] [2021-07-09 17:44:12,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 954 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 954 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:12,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:44:12,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:12,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:44:12,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:12,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750016049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:12,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:12,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:44:12,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756768239] [2021-07-09 17:44:12,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:44:12,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:12,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:44:12,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:44:12,382 INFO L87 Difference]: Start difference. First operand 315 states and 701 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:13,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:13,112 INFO L93 Difference]: Finished difference Result 390 states and 852 transitions. [2021-07-09 17:44:13,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:44:13,112 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:13,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:13,113 INFO L225 Difference]: With dead ends: 390 [2021-07-09 17:44:13,113 INFO L226 Difference]: Without dead ends: 390 [2021-07-09 17:44:13,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 679.8ms TimeCoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:44:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-07-09 17:44:13,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 315. [2021-07-09 17:44:13,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.232484076433121) internal successors, (701), 314 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:13,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 701 transitions. [2021-07-09 17:44:13,116 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 701 transitions. Word has length 21 [2021-07-09 17:44:13,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:13,116 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 701 transitions. [2021-07-09 17:44:13,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:13,116 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 701 transitions. [2021-07-09 17:44:13,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:13,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:13,116 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:13,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4456,954 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:13,317 INFO L430 AbstractCegarLoop]: === Iteration 960 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:13,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:13,317 INFO L82 PathProgramCache]: Analyzing trace with hash -388402162, now seen corresponding path program 954 times [2021-07-09 17:44:13,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:13,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060953310] [2021-07-09 17:44:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:13,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:13,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060953310] [2021-07-09 17:44:13,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060953310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:13,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390464058] [2021-07-09 17:44:13,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 955 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 955 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:13,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:44:13,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:13,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:44:13,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:13,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390464058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:13,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:13,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:44:13,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997492823] [2021-07-09 17:44:13,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:44:13,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:13,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:44:13,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:44:13,753 INFO L87 Difference]: Start difference. First operand 315 states and 701 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:14,055 INFO L93 Difference]: Finished difference Result 328 states and 721 transitions. [2021-07-09 17:44:14,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:44:14,055 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:14,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:14,055 INFO L225 Difference]: With dead ends: 328 [2021-07-09 17:44:14,055 INFO L226 Difference]: Without dead ends: 322 [2021-07-09 17:44:14,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:44:14,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-07-09 17:44:14,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 314. [2021-07-09 17:44:14,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.230031948881789) internal successors, (698), 313 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:14,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 698 transitions. [2021-07-09 17:44:14,058 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 698 transitions. Word has length 21 [2021-07-09 17:44:14,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:14,058 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 698 transitions. [2021-07-09 17:44:14,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:14,058 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 698 transitions. [2021-07-09 17:44:14,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:14,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:14,059 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:14,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 955 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4460 [2021-07-09 17:44:14,259 INFO L430 AbstractCegarLoop]: === Iteration 961 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:14,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:14,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1259656922, now seen corresponding path program 955 times [2021-07-09 17:44:14,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:14,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112625555] [2021-07-09 17:44:14,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:14,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:14,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112625555] [2021-07-09 17:44:14,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112625555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:14,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514090698] [2021-07-09 17:44:14,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 956 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 956 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:14,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:44:14,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:14,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514090698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:14,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:14,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:44:14,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407328129] [2021-07-09 17:44:14,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:44:14,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:14,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:44:14,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:44:14,614 INFO L87 Difference]: Start difference. First operand 314 states and 698 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:15,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:15,437 INFO L93 Difference]: Finished difference Result 405 states and 883 transitions. [2021-07-09 17:44:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:44:15,437 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:15,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:15,438 INFO L225 Difference]: With dead ends: 405 [2021-07-09 17:44:15,438 INFO L226 Difference]: Without dead ends: 405 [2021-07-09 17:44:15,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 702.8ms TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:44:15,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-07-09 17:44:15,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 315. [2021-07-09 17:44:15,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.229299363057325) internal successors, (700), 314 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:15,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 700 transitions. [2021-07-09 17:44:15,441 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 700 transitions. Word has length 21 [2021-07-09 17:44:15,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:15,441 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 700 transitions. [2021-07-09 17:44:15,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:15,441 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 700 transitions. [2021-07-09 17:44:15,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:15,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:15,441 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:15,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4465,956 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:15,641 INFO L430 AbstractCegarLoop]: === Iteration 962 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:15,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:15,642 INFO L82 PathProgramCache]: Analyzing trace with hash 899740404, now seen corresponding path program 956 times [2021-07-09 17:44:15,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:15,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084950474] [2021-07-09 17:44:15,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:15,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:15,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084950474] [2021-07-09 17:44:15,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084950474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:15,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117129352] [2021-07-09 17:44:15,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 957 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 957 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:15,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:44:15,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:15,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:44:15,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:15,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:15,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:15,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:44:15,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:15,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:15,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:44:15,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:16,008 INFO L628 ElimStorePlain]: treesize reduction 76, result has 38.2 percent of original size [2021-07-09 17:44:16,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:16,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:44:16,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:16,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:16,026 INFO L518 ElimStorePlain]: Eliminatee v_prenex_846 vanished before elimination [2021-07-09 17:44:16,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:16,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:44:16,029 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:44:16,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:16,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:16,044 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:44:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:16,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117129352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:16,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:16,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 17:44:16,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608504133] [2021-07-09 17:44:16,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:44:16,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:16,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:44:16,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:44:16,089 INFO L87 Difference]: Start difference. First operand 315 states and 700 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:16,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:16,891 INFO L93 Difference]: Finished difference Result 408 states and 889 transitions. [2021-07-09 17:44:16,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:44:16,891 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:16,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:16,892 INFO L225 Difference]: With dead ends: 408 [2021-07-09 17:44:16,892 INFO L226 Difference]: Without dead ends: 408 [2021-07-09 17:44:16,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 718.5ms TimeCoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:44:16,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-07-09 17:44:16,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 316. [2021-07-09 17:44:16,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.2285714285714286) internal successors, (702), 315 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 702 transitions. [2021-07-09 17:44:16,895 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 702 transitions. Word has length 21 [2021-07-09 17:44:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:16,895 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 702 transitions. [2021-07-09 17:44:16,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 702 transitions. [2021-07-09 17:44:16,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:16,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:16,895 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:17,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4469,957 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:17,096 INFO L430 AbstractCegarLoop]: === Iteration 963 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:17,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:17,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1609788174, now seen corresponding path program 957 times [2021-07-09 17:44:17,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:17,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183447158] [2021-07-09 17:44:17,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:17,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:17,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183447158] [2021-07-09 17:44:17,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183447158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:17,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068780087] [2021-07-09 17:44:17,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 958 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 958 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:17,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:44:17,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:17,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:44:17,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:17,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:17,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:17,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:44:17,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:17,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:17,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:44:17,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:17,527 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-07-09 17:44:17,527 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-07-09 17:44:17,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:44:17,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:17,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:17,541 INFO L518 ElimStorePlain]: Eliminatee v_prenex_849 vanished before elimination [2021-07-09 17:44:17,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:17,542 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-07-09 17:44:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:17,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068780087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:17,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:17,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:44:17,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671304295] [2021-07-09 17:44:17,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:44:17,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:17,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:44:17,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:44:17,571 INFO L87 Difference]: Start difference. First operand 316 states and 702 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:18,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:18,110 INFO L93 Difference]: Finished difference Result 337 states and 743 transitions. [2021-07-09 17:44:18,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:44:18,110 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:18,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:18,110 INFO L225 Difference]: With dead ends: 337 [2021-07-09 17:44:18,110 INFO L226 Difference]: Without dead ends: 337 [2021-07-09 17:44:18,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 576.2ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:44:18,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-07-09 17:44:18,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 311. [2021-07-09 17:44:18,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.232258064516129) internal successors, (692), 310 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:18,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 692 transitions. [2021-07-09 17:44:18,113 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 692 transitions. Word has length 21 [2021-07-09 17:44:18,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:18,113 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 692 transitions. [2021-07-09 17:44:18,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:18,113 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 692 transitions. [2021-07-09 17:44:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:18,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:18,114 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:18,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 958 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4473 [2021-07-09 17:44:18,314 INFO L430 AbstractCegarLoop]: === Iteration 964 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:18,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:18,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1589258578, now seen corresponding path program 958 times [2021-07-09 17:44:18,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:18,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250718885] [2021-07-09 17:44:18,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:18,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:18,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250718885] [2021-07-09 17:44:18,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250718885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:18,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817323407] [2021-07-09 17:44:18,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 959 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 959 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:18,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:44:18,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:18,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:44:18,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:18,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817323407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:18,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:18,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:44:18,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059207285] [2021-07-09 17:44:18,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:44:18,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:18,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:44:18,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:44:18,621 INFO L87 Difference]: Start difference. First operand 311 states and 692 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:18,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:18,844 INFO L93 Difference]: Finished difference Result 352 states and 773 transitions. [2021-07-09 17:44:18,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:44:18,844 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:18,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:18,845 INFO L225 Difference]: With dead ends: 352 [2021-07-09 17:44:18,845 INFO L226 Difference]: Without dead ends: 352 [2021-07-09 17:44:18,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 241.5ms TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:44:18,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-07-09 17:44:18,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 311. [2021-07-09 17:44:18,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.232258064516129) internal successors, (692), 310 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 692 transitions. [2021-07-09 17:44:18,848 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 692 transitions. Word has length 21 [2021-07-09 17:44:18,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:18,848 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 692 transitions. [2021-07-09 17:44:18,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:18,848 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 692 transitions. [2021-07-09 17:44:18,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:18,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:18,848 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:19,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 959 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4480 [2021-07-09 17:44:19,048 INFO L430 AbstractCegarLoop]: === Iteration 965 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:19,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:19,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1655813506, now seen corresponding path program 959 times [2021-07-09 17:44:19,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:19,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992684332] [2021-07-09 17:44:19,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:19,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:19,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992684332] [2021-07-09 17:44:19,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992684332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:19,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941422158] [2021-07-09 17:44:19,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 960 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 960 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:19,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:44:19,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:19,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:44:19,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:19,351 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:19,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941422158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:19,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:19,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:44:19,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696933756] [2021-07-09 17:44:19,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:44:19,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:19,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:44:19,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:44:19,352 INFO L87 Difference]: Start difference. First operand 311 states and 692 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:19,929 INFO L93 Difference]: Finished difference Result 379 states and 828 transitions. [2021-07-09 17:44:19,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:44:19,929 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:19,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:19,930 INFO L225 Difference]: With dead ends: 379 [2021-07-09 17:44:19,930 INFO L226 Difference]: Without dead ends: 379 [2021-07-09 17:44:19,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 572.9ms TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:44:19,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-07-09 17:44:19,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 312. [2021-07-09 17:44:19,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.2315112540192925) internal successors, (694), 311 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 694 transitions. [2021-07-09 17:44:19,933 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 694 transitions. Word has length 21 [2021-07-09 17:44:19,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:19,933 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 694 transitions. [2021-07-09 17:44:19,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 694 transitions. [2021-07-09 17:44:19,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:19,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:19,933 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:20,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 960 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4484 [2021-07-09 17:44:20,133 INFO L430 AbstractCegarLoop]: === Iteration 966 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:20,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:20,134 INFO L82 PathProgramCache]: Analyzing trace with hash 411034450, now seen corresponding path program 960 times [2021-07-09 17:44:20,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:20,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651975271] [2021-07-09 17:44:20,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:20,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:20,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651975271] [2021-07-09 17:44:20,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651975271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:20,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374408396] [2021-07-09 17:44:20,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 961 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 961 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:20,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:44:20,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:20,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:44:20,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:20,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374408396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:20,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:20,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 17:44:20,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436089096] [2021-07-09 17:44:20,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:44:20,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:20,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:44:20,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:44:20,452 INFO L87 Difference]: Start difference. First operand 312 states and 694 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:21,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:21,088 INFO L93 Difference]: Finished difference Result 409 states and 887 transitions. [2021-07-09 17:44:21,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:44:21,089 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:21,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:21,089 INFO L225 Difference]: With dead ends: 409 [2021-07-09 17:44:21,089 INFO L226 Difference]: Without dead ends: 409 [2021-07-09 17:44:21,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 618.3ms TimeCoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:44:21,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-07-09 17:44:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 313. [2021-07-09 17:44:21,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.230769230769231) internal successors, (696), 312 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 696 transitions. [2021-07-09 17:44:21,092 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 696 transitions. Word has length 21 [2021-07-09 17:44:21,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:21,092 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 696 transitions. [2021-07-09 17:44:21,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:21,092 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 696 transitions. [2021-07-09 17:44:21,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:21,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:21,093 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:21,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4488,961 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:21,293 INFO L430 AbstractCegarLoop]: === Iteration 967 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:21,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:21,293 INFO L82 PathProgramCache]: Analyzing trace with hash 51117932, now seen corresponding path program 961 times [2021-07-09 17:44:21,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:21,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674612161] [2021-07-09 17:44:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:21,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:21,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674612161] [2021-07-09 17:44:21,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674612161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:21,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553930719] [2021-07-09 17:44:21,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 962 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 962 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:21,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:44:21,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:21,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:21,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:21,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:44:21,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:21,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:21,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:44:21,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:21,628 INFO L628 ElimStorePlain]: treesize reduction 74, result has 39.8 percent of original size [2021-07-09 17:44:21,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:21,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-09 17:44:21,631 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 17:44:21,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:21,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:44:21,652 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:21,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:21,666 INFO L518 ElimStorePlain]: Eliminatee v_prenex_854 vanished before elimination [2021-07-09 17:44:21,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:21,668 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-07-09 17:44:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:21,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553930719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:21,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:21,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 17:44:21,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110935403] [2021-07-09 17:44:21,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:44:21,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:21,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:44:21,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:44:21,712 INFO L87 Difference]: Start difference. First operand 313 states and 696 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:22,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:22,479 INFO L93 Difference]: Finished difference Result 407 states and 883 transitions. [2021-07-09 17:44:22,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:44:22,480 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:44:22,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:22,480 INFO L225 Difference]: With dead ends: 407 [2021-07-09 17:44:22,480 INFO L226 Difference]: Without dead ends: 407 [2021-07-09 17:44:22,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 682.6ms TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:44:22,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-07-09 17:44:22,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 314. [2021-07-09 17:44:22,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.230031948881789) internal successors, (698), 313 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:22,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 698 transitions. [2021-07-09 17:44:22,483 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 698 transitions. Word has length 21 [2021-07-09 17:44:22,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:22,483 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 698 transitions. [2021-07-09 17:44:22,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:22,483 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 698 transitions. [2021-07-09 17:44:22,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:44:22,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:22,484 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:22,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 962 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4492 [2021-07-09 17:44:22,684 INFO L430 AbstractCegarLoop]: === Iteration 968 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:22,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:22,684 INFO L82 PathProgramCache]: Analyzing trace with hash 761165702, now seen corresponding path program 962 times [2021-07-09 17:44:22,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:22,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461005318] [2021-07-09 17:44:22,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:22,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:22,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461005318] [2021-07-09 17:44:22,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461005318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:22,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574834636] [2021-07-09 17:44:22,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 963 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 963 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:22,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:44:22,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:22,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:44:22,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:23,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:23,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:23,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:44:23,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:23,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:44:23,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:44:23,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. Received shutdown request... [2021-07-09 17:44:23,081 WARN L222 SmtUtils]: Removed 5 from assertion stack [2021-07-09 17:44:23,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 963 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4496 [2021-07-09 17:44:23,282 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 17:44:23,283 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 17:44:23,284 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 17:44:23,285 INFO L202 PluginConnector]: Adding new model chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 05:44:23 BasicIcfg [2021-07-09 17:44:23,285 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 17:44:23,285 INFO L168 Benchmark]: Toolchain (without parser) took 907333.16 ms. Allocated memory was 200.3 MB in the beginning and 330.3 MB in the end (delta: 130.0 MB). Free memory was 179.3 MB in the beginning and 160.5 MB in the end (delta: 18.8 MB). Peak memory consumption was 149.9 MB. Max. memory is 8.0 GB. [2021-07-09 17:44:23,285 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 200.3 MB. Free memory is still 180.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:44:23,285 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.40 ms. Allocated memory is still 200.3 MB. Free memory was 179.1 MB in the beginning and 177.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:44:23,285 INFO L168 Benchmark]: Boogie Preprocessor took 17.23 ms. Allocated memory is still 200.3 MB. Free memory was 177.8 MB in the beginning and 176.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:44:23,285 INFO L168 Benchmark]: RCFGBuilder took 249.25 ms. Allocated memory is still 200.3 MB. Free memory was 176.5 MB in the beginning and 158.7 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-07-09 17:44:23,285 INFO L168 Benchmark]: TraceAbstraction took 907042.42 ms. Allocated memory was 200.3 MB in the beginning and 330.3 MB in the end (delta: 130.0 MB). Free memory was 158.3 MB in the beginning and 160.5 MB in the end (delta: -2.2 MB). Peak memory consumption was 128.9 MB. Max. memory is 8.0 GB. [2021-07-09 17:44:23,285 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 200.3 MB. Free memory is still 180.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.40 ms. Allocated memory is still 200.3 MB. Free memory was 179.1 MB in the beginning and 177.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.23 ms. Allocated memory is still 200.3 MB. Free memory was 177.8 MB in the beginning and 176.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 249.25 ms. Allocated memory is still 200.3 MB. Free memory was 176.5 MB in the beginning and 158.7 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 907042.42 ms. Allocated memory was 200.3 MB in the beginning and 330.3 MB in the end (delta: 130.0 MB). Free memory was 158.3 MB in the beginning and 160.5 MB in the end (delta: -2.2 MB). Peak memory consumption was 128.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 42 for 43ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 906938.4ms, OverallIterations: 968, TraceHistogramMax: 5, EmptinessCheckTime: 278.8ms, AutomataDifference: 346483.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 28869 SDtfs, 30927 SDslu, 222910 SDs, 0 SdLazy, 398360 SolverSat, 12621 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 141449.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34493 GetRequests, 10954 SyntacticMatches, 1111 SemanticMatches, 22428 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100670 ImplicationChecksByTransitivity, 398520.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=321occurred in iteration=931, InterpolantAutomatonStates: 15814, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1739.0ms AutomataMinimizationTime, 967 MinimizatonAttempts, 28380 StatesRemovedByMinimization, 944 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3122.3ms SsaConstructionTime, 10296.7ms SatisfiabilityAnalysisTime, 334215.6ms InterpolantComputationTime, 36315 NumberOfCodeBlocks, 36315 NumberOfCodeBlocksAsserted, 3425 NumberOfCheckSat, 34387 ConstructedInterpolants, 2003 QuantifiedInterpolants, 446331 SizeOfPredicates, 5872 NumberOfNonLiveVariables, 80712 ConjunctsInSsa, 23764 ConjunctsInUnsatCore, 1928 InterpolantComputations, 6 PerfectInterpolantSequences, 2728/30551 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown